Yamaha Vector RS90GTA Owner's Manual
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Yamaha Vector RS90GTA Owner's Manual

Yamaha Vector RS90GTA Owner's Manual

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OWNER'S MANUAL
Read this manual carefully
before operating this vehicle.
RS90GTA
RS90LTGTA
RST90A
RST90GTA
LIT-12628-02-95
8JA-28199-11

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Table of Contents
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Summary of Contents for Yamaha Vector RS90GTA

  • Page 1 OWNER’S MANUAL Read this manual carefully before operating this vehicle. RS90GTA RS90LTGTA RST90A RST90GTA LIT-12628-02-95 8JA-28199-11...
  • Page 2 ESU10041 Read this manual carefully before operating this vehicle. This manual should stay with this vehicle if it is sold.
  • Page 3 ©2010 by Yamaha Motor Corporation, U.S.A. It represents the high degree of craftsmanship 1st Edition, June 2010 and reliability that have made Yamaha a lead- All rights reserved. er in these fields. Any reprinting or unauthorized use This manual will give you an understanding of...
  • Page 4 Important manual information ESU10151 Particularly important information is distin- guished in this manual by the following nota- tions. This is the safety alert symbol. It is used to alert you to potential personal injury haz- ards. Obey all safety messages that follow this symbol to avoid possible injury or death.

  • Page 5: Table Of Contents

    Contents Backrest (RST90 / RST90GT) ..30 Location of the important labels ..1 Storage compartment (RS90GT / RS90LTGT / RST90GT) ... 31 Safety information ......6 Storage areas (RST90) ....33 Tow hitch bracket Description ........8 (RST90 / RST90GT) ....35 Fuel ..........
  • Page 6 Replacing a fuse ......109 Troubleshooting ......116 Storage .......... 120 Specifications ....... 122 Consumer information....125 Identification number records ..125 Vehicle Emission Control Information label ...... 126 YAMAHA MOTOR CORPORATION, U.S.A. SNOWMOBILE LIMITED WARRANTY......127 YAMAHA EXTENDED SERVICE (Y.E.S.)........130...

  • Page 7: Location Of The Important Labels

    Read and understand all of the labels on your vehicle. They contain important information for safe and proper operation of your vehicle. Never remove any labels from your vehicle. If a label becomes difficult to read or comes off, a replacement label is available from your Yamaha deal- RS90GT / RS90LTGT...

  • Page 8: Location Of The Important Labels

    Location of the important labels RS90GT / RS90LTGT RST90 RST90GT...
  • Page 9 Location of the important labels 1 RS90GT / RS90LTGT ATTENTION 8ET-2815K-10 1 RST90 NOTICE 8ET-2815K-00 1 RST90GT WARNING AVERTISSEMENT SEVERE INJURY OR DEATH MAY RESULT IF YOU IGNORE ANY OF AFIN D’ÉVITER TOUT RISQUE DE BLESSURE SÉRIEUSE OU MÊME MORTELLE, THE FOLLOWING: VEUILLEZ SUIVRE LES RECOMMANDATIONS SUIVANTES: •...
  • Page 10 Location of the important labels 8 RS90GT / RS90LTGT / RST90 9 RS90GT / RS90LTGT 8FR-77763-E0 TUNE-UP SPECIFICATIONS SPECIFICATIONS DE LA MISE AU POINT DRIVE ENTRAÎNEMENT 1. CHAIN CASE OIL Q’TY 1. CAPACITÉ D’HUILE DU CARTER DE CHAÎNE 250 cm³ (8.5 oz) 2.
  • Page 11 Location of the important labels 13 RS90LTGT 14 RST90 / RST90GT 15 RST90 / RST90GT LOAD LIMIT / CHARGE LIMITE LOAD LIMIT / CHARGE LIMITE 10kg {22lbs} 20kg {44lbs} 8ET-24897-00 8FM-24897-01 16 RST90 / RST90GT MAX. TOWING FORCE MAX. VERTICAL FORCE FORCE DE REMORQUAGE MAX.

  • Page 12: Safety Information

    Become familiar with all of the operating RS90GT and RS90LTGT are designed to controls and their function. Consult a carry the OPERATOR ONLY. Passengers Yamaha dealer about any control or func- are prohibited. Carrying a passenger can tion you do not understand. cause loss of control.
  • Page 13 Many surfaces such as ice and hardpacked cessories or offer other modifications for snow require much longer stopping distanc- Yamaha vehicles. Yamaha is not in a position es. Be alert, plan ahead and begin deceler- to test the products that these aftermarket ating early.

  • Page 14: Description

    Description ESU10261 RS90GT 1,2,3 5,6,7 RS90LTGT 1,2,3 5,6,7 1. Battery 13. Drive track 2. Main fuse 14. V-belt holder 3. Air filter 4. Oil filler cap 5. Fuse box 6. Coolant reservoir 7. Coolant recovery tank 8. Storage compartment 9. Tool kit 10.
  • Page 15 Description RST90 10,12 1,2,3,4 7 8 9 19 13 RST90GT 1,2,3 9 10,11,12 13 1. Battery 16. Drive track 2. Main fuse 17. V-belt holder 3. Air filter 18. Solo touring storage area (RST90) 4. Oil filler cap 19. Rear carrier (RST90) 5.
  • Page 16 Description RS90GT / RS90LTGT RST90 RST90GT 4 12 2 3 6 1. Brake lever 8. Throttle lever 2. Parking brake lever 9. Main switch 3. Grip/thumb warmer adjusting switch 10. Shift lever (RS90GT / RS90LTGT / RST90GT) 11. Auxiliary DC jack 4.

  • Page 17: Control Functions

    Control functions ESU13740 Main switch The main switch controls the ignition and lighting systems. The various positions are described below. 1. Starter (choke) lever Refer to the “Starting the engine” section on page 48 for proper operation. 1. Off 2. On 3.

  • Page 18: Throttle Override System (T.o.r.s.)

    (RS90GT / RS90LTGT / RST90GT) or flash- EWS00041 es (RST90) in the meter display. If this oc- WARNING curs, have a Yamaha dealer check the If the T.O.R.S. is activated, make sure that system as soon as possible. the cause of the malfunction has been cor-...

  • Page 19: Multi-Function Meter Unit

    Control functions RST90 a display brightness control function When the key is turned to the on position, the tachometer needle makes one sweep, and the low coolant temperature indicator light, the warning light, and all segments of the meter unit display come on and go off. E LO 1.
  • Page 20 Control functions Odometer and tripmeter modes counting the distance traveled from that point. When this occurs, change the engine oil as E LO soon as possible. (See page 77 for the oil change procedure.) E LO 1. Odometer/tripmeter/fuel reserve tripmeter Pushing the “SELECT”...
  • Page 21 Control functions If the engine oil is changed before the oil Push the “RESET” button to change the change tripmeter appears in the display (i.e., hour setting, and then push the “SE- before the periodic oil change interval has LECT” button. The minute digits will start been reached), the tripmeter must be reset af- flashing.

  • Page 22: High Beam Indicator Light

    Control functions a tachometer an odometer To switch the speedometer, odometer, and a tripmeter (which shows the distance trav- tripmeter displays between kilometers and eled since it was last set to zero) miles, select the odometer mode “ODO”, and warning indicators (which show engine then push the select/reset button for at least trouble, coolant temperature, fuel level, and 10 seconds while the snowmobile is stopped.

  • Page 23: Low Coolant Temperature Indicator Light

    Control functions RS90GT / RS90LTGT / RST90GT RS90GT / RS90LTGT / RST90GT 1. High beam indicator light “ ” 1. Low coolant temperature indicator light “ ” RST90 RST90 1. High beam indicator light “ ” 1. Low coolant temperature indicator ESU13761 light “...

  • Page 24: Fuel Meter And Grip/Thumb Warmer Level Indicator

    Control functions ESU14040 Fuel meter and grip/thumb The snowmobile must be stopped on a level warmer level indicator surface to obtain an accurate fuel meter read- RS90GT / RS90LTGT / RST90GT ing, since the reading changes according to The fuel meter and grip/thumb warmer level the movement and inclination of the snowmo- indicator have eight segments which show bile.
  • Page 25 Control functions The grip/thumb warmer level is displayed for 5 seconds after releasing the grip/thumb warmer adjusting switch, then the display switches to the fuel meter. When the engine is started, the grip/thumb warmer levels are set to the levels selected when the engine was last stopped.

  • Page 26: Fuel Level Warning Indicator

    1. Grip warmer adjusting switch If this occurs, have a Yamaha dealer inspect the snowmobile as soon as possible. RS90GT / RS90LTGT / RST90GT 1. Thumb warmer adjusting switch 1.

  • Page 27: Oil Level Warning Indicator

    If the oil level warning indicator and the warn- ESU10462 Oil level warning indicator “ ” ing light still remain on, have a Yamaha dealer The oil level warning indicator and the warn- check the snowmobile. ing light come on when the engine oil level is...

  • Page 28: Self-Diagnosis Device

    ” flashes slowly (RST90) in the meter display. 2. Engine trouble warning indicator “ ” Note the error code, and then have a Yamaha 3. Error code display dealer inspect the snowmobile as soon as ESU10531 possible. NOTICE: Do not continue to oper- Engine stop switch “...

  • Page 29: Headlight Beam Switch "Lights

    Control functions 1. Engine stop switch “ ” 1. Grip/thumb warmer adjusting switch During the first few rides, practice using the To raise the temperature stop switch so that you can react quickly in an To raise the grip warmer temperature, press emergency.

  • Page 30: Auxiliary Dc Jack

    Control functions RS90GT / RS90LTGT / RST90GT 1. Thumb warmer adjusting switch 1. Auxiliary DC jack cap To raise the temperature 2. Auxiliary DC jack To raise the temperature, press the respec- RST90 tive switch to “HI”. To lower the temperature To lower the temperature, press the respec- tive switch to “LO”.

  • Page 31: Helmet Shield Heater Jack (Rs90Gt / Rs90Ltgt / Rst90Gt)

    Control functions Maximum rated capacity: Maximum rated capacity: DC 12 V, 2.5 A (30 W) DC 12 V, 1.5 A (18 W) ESU13264 ESU10571 Helmet shield heater jack Brake lever (RS90GT / RS90LTGT / The snowmobile is stopped by braking the en- tire drive system.

  • Page 32: Parking Brake Lever

    Control functions ESU10593 Shift lever The shift lever is used to put the snowmobile into forward or reverse. After coming to a complete stop, pull the shift lever out, slide it to “FWD” or to “REV” until it stops, and then release it.

  • Page 33: Drive Guard

    Control functions 1. Pull out. 1. Pull out. 2. Slide to “REV” (reverse). 2. Slide to “REV” (reverse). 3. Release. 3. Release. ECS00072 RST90 NOTICE Do not use the shift lever while the snow- mobile is moving, otherwise the drive train could be damaged.

  • Page 34: V-Belt Holders

    Control functions The drive guard is designed to protect the V- belt clutch and V-belt in case parts break or come loose. The drive guard is located behind the left side cover (RS90GT / RS90LTGT / RST90GT), or under the shroud (RST90). [See page 63 (RS90GT / RS90LTGT / RST90GT) or page 67 (RST90) for information on how to access the drive guard.]...

  • Page 35: Passenger Grips (Rst90Gt)

    Control functions RS90GT / RS90LTGT / RST90GT 1. Passenger grip 1. V-belt holder 2. Passenger grip adjusting knob RST90 To change the passenger grip posi- tion Remove the passenger grip adjusting knob by turning it counterclockwise. Move the passenger grip to the desired position.

  • Page 36: Passenger Footrests (Rst90 / Rst90Gt)

    Control functions RST90 1. Footrest 1. Passenger grip warmer switch 2. Screw 2. Off 3. “HI” (high) ECS00131 NOTICE 4. “LO” (low) Make sure that the screws are tightened RST90GT securely after changing the position of the footrests. Do not overtighten the screws, other- wise the footrest may be damaged.

  • Page 37: Storage Compartment (Rs90Gt / Rs90Ltgt / Rst90Gt)

    Control functions RST90 When riding without a passenger, the back- rest can be moved to the forward-most posi- tion, and its angle can be adjusted to suit the operator’s preference as shown. 1. Backrest 2. Backrest adjusting knob RST90GT ESU14120 Storage compartment (RS90GT / RS90LTGT / RST90GT)
  • Page 38 Control functions To close the storage compartment Fold the storage compartment cover down, and then turn the fastener to the original posi- tion. RST90GT This snowmobile is equipped with a storage compartment, which includes a storage pouch. Storage compartment ECS00900 NOTICE 1.

  • Page 39: Storage Areas (Rst90)

    Control functions ECS00781 NOTICE Before starting the engine, make sure that the tool kit is securely fastened and that the storage pouch zipper is completely closed. ESU10823 Storage areas (RST90) This snowmobile is equipped with a storage compartment, rear storage area, and rear car- 1.
  • Page 40 Control functions 1. Backrest 1. Hole 2. Rear carrier 2. Rear carrier Remove the passenger seat lock knob, 3. Bolt and then remove the passenger seat. 4. Carrier lock bracket Slide the rear carrier backward until it stops. Pull the carrier lock lever up to lock the rear carrier in place.

  • Page 41: Tow Hitch Bracket (Rst90 / Rst90Gt)

    Control functions Align the holes in the backrest bracket with the bolts on the carrier lock bracket, and then place the backrest on the carrier lock bracket. 1. Carrier lock lever ESU10862 Tow hitch bracket (RST90 / RST90GT) 1. Hole ECS00241 NOTICE To prevent premature wear of the V-belt,...

  • Page 42: Fuel

    Control functions Tow weight limit: 120 kgf (264 lbf) Vertical weight limit: 15 kgf (33 lbf) ESU10605 Fuel EWS00071 WARNING Gasoline and gasoline vapors are ex- tremely flammable. To avoid fires and ex- 1. Filler tube plosions and to reduce the risk of injury 2.

  • Page 43: Suspension

    Do not use alcohol deicers or water ab- include the special wrench, the special sorbing additives with oxygenated fuel. wrench can be obtained at a Yamaha dealer. The fuel tank should be filled with the recommended gasoline. The use of oth-...
  • Page 44 Control functions To increase the spring preload and there- Spring preload setting*: by harden the suspension, turn the ad- Minimum (soft): justing nut in direction (a). To decrease RS90GT / RS90LTGT 119.0 mm (4.69 in) the spring preload and thereby soften the RST90 161.0 mm (6.34 in) suspension, turn the adjusting nut in di- RST90GT 122.6 mm (4.83 in)
  • Page 45 Control functions To increase the compression damping force, turn the adjusting knob in direction (a). To de- crease the compression damping force, turn the adjusting knob in direction (b). 1. Rebound damping force adjusting knob Rebound damping setting: Minimum (soft): 20 click(s) in direction (b)* 1.
  • Page 46 Control functions the spring preload and thereby soften the Tightening torque: suspension, turn the adjusting nut in di- Locknut: rection (b). 42 Nm (4.2 m·kgf, 30 ft·lbf) Rear torsion springs EWS00750 WARNING The left and right spring preloads must be adjusted to the same setting.
  • Page 47 Maximum (hard): The spring preload can be further adjusted by changing the position of the spring seat. Have a Yamaha dealer make this adjustment as it requires special tools. ESU13094 Adjusting the 2-up adjusting blocks 1. 2-up position (rider and passenger) 2.
  • Page 48 Control functions ESU14010 Rebound damping setting: Adjusting the rebound damping force Minimum (soft): of the rear shock absorber (RS90GT / 11 click(s) in direction (b)* RS90LTGT) Standard: EWS00161 Adjusting dial aligned with standard WARNING position match mark Maximum (hard): Do not turn the remote adjusting dial while 11 click(s) in direction (a)* the snowmobile is moving as this could * With the adjusting dial in the standard...
  • Page 49 Control functions Compression damping force setting: Minimum (soft): Use the special wrench in the owner’s tool kit 12 click(s) in direction (b)* to make this adjustment. Standard: 6 click(s) in direction (b)* Loosen the locknut. Maximum (hard): To increase weight transfer, turn the ad- 2 click(s) in direction (b)* juster in direction (a), and to decrease * With the adjusting knob fully turned in...
  • Page 50 Control functions 1. Special wrench Locknut tightening torque: 35 Nm (3.5 m·kgf, 25 ft·lbf) RST90 / RST90GT EWS00770 WARNING The left and right adjusting nuts must be set to the same position. Uneven settings can cause poor handling and loss of sta- bility.
  • Page 51 Control functions 1. Locknut 2. Control rod adjusting nut 3. Standard position 4. Adjustable range 5. Red paint area Tighten the locknut while holding the ad- justing nut in place. NOTICE: Always tighten the locknut against the adjust- ing nut, and then tighten the locknut to the specified torque.

  • Page 52: Pre-Operation Checks

    • Make sure the drive guard is installed securely. Drive guard • Check the drive guard mounts for damage. • Check operation. • If soft or spongy, have Yamaha dealer bleed hy- draulic system. • Check brake pads for wear. Brake •...
  • Page 53 • Check the deflection. • Adjust if necessary. Drive track • Check for wear and damage. • If necessary, have a Yamaha dealer replace track. • Check for wear and damage. Slide runners • If necessary, have Yamaha dealer replace slide runners.

  • Page 54: Operation

    Turn the main switch to the start position the engine does not start or if it stops again, and release it when the engine starts. ask a Yamaha dealer to inspect the snow- NOTICE: Release the switch immedi- mobile. ately after the engine starts. If the en-...
  • Page 55 Operation 1. Start 1. Run position 2. Off position Warm up the engine until it runs smooth- Fully open the starter (choke) lever. Be sure the low coolant temperature indi- cator light has gone out before operation. (See page 17 for detailed information about the indicator light.) RST90 Apply the parking brake.

  • Page 56: Break-In

    After 800 km (500 mi) of operation, the engine oil must be changed and the oil filter cartridge replaced. If any engine trouble should occur dur- ing the engine break-in period, immedi- ately have a Yamaha dealer check the snowmobile. ESU11333 1. Start Riding your snowmobile...
  • Page 57 Operation Pay particular attention to the safety informa- Braking tion on page 6. EWS00220 WARNING Please read all warning and notice labels on Many surfaces such as ice and hard- your snowmobile. Also, read the Snowmobil- packed snow require much longer stop- er’s Safety Handbook that is supplied with ping distances.
  • Page 58 Operation Improper riding techniques such as abrupt throttle changes, excessive braking, incorrect body movements, or too much speed for the sharpness of the turn may cause the snow- mobile to tip. If your snowmobile begins to tip while turning, lean more into the turn to regain balance. If necessary, gradually let off on the throttle or steer to the outside of the turn.
  • Page 59 Operation Snow and ice are slippery, so be prepared for the possibility that your snowmobile could be- gin to slip sideways on the slope. If this hap- pens, steer in the direction of the slide if there are no obstacles in your path. As you regain proper balance, gradually steer again in the direction you wish to travel.

  • Page 60: Maximizing Drive Track Life

    Recommendations recommendations. Track tension Yamaha does not recommend track stud- During initial break-in, the new drive track will ding. tend to stretch quickly as the track settles. Be sure to correct the track tension and align-...

  • Page 61: Driving

    Operation RS90GT / RS90LTGT / RST90GT ESU11394 Driving EWS00300 WARNING Be sure to read the “SAFETY INFORMA- TION” section on page 6 and the “Riding your snowmobile” section on page 50 carefully before operating the snowmo- bile. 1. Pull out. Make sure that the engine is warmed up 2.

  • Page 62: Stopping The Engine

    Operation 1. Pull out. 1. Off 2. Slide to “REV” (reverse). 3. Release. Push down the engine stop switch to stop the engine in an emergency. The reverse buzzer beeps while the shift lever is in reverse. While squeezing the brake lever, release the parking brake by moving the parking brake lever to the right, and then release the brake lever.
  • Page 63 Operation If transporting the snowmobile in an open trailer or truck, put a tight fitting cover on the snowmobile. A cover specifically designed for your snowmobile is best. This will help keep foreign objects out of the cooling vents, and also help protect the snowmo- bile against damage from debris on the road.

  • Page 64: Periodic Maintenance And Adjustment

    Failure to properly maintain the snowmobile or performing maintenance activities incor- rectly may increase your risk of injury or death during service or while using the snow- mobile. If you are not familiar with snowmobile service, have a Yamaha dealer perform service.

  • Page 65: Periodic Maintenance Chart For The Emission Control System

    Periodic maintenance and adjustment ESU11461 Periodic maintenance chart for the emission control system Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical skills. INITIAL EVERY Seasonally 1 month ITEM...

  • Page 66: General Maintenance And Lubrication Chart

    Periodic maintenance and adjustment ESU11564 General maintenance and lubrication chart INITIAL EVERY Seasonally 1 month ITEM REMARKS PAGE or 800 km 4000 km (500 mi) (2500 mi) (40 hr) (200 hr) • Change (warm engine before Engine oil draining). Every Engine oil filter car- •...
  • Page 67 Periodic maintenance and adjustment INITIAL EVERY Seasonally 1 month ITEM REMARKS PAGE or 800 km 4000 km (500 mi) (2500 mi) (40 hr) (200 hr) • Check for wear and damage. * Slide runners • Replace if necessary. Skis and ski run- •...

  • Page 68: Tool Kit

    RS90GT / RS90LTGT / RST90 during a service operation requiring one, take The owner’s tool kit is located in the storage your snowmobile to a Yamaha dealer to compartment. (See page 31 for information check the torque settings and adjust them if on how to access the storage compartment.)

  • Page 69: Removing And Installing The Shroud And Covers (Rs90Gt / Rs90Ltgt / Rst90Gt)

    Periodic maintenance and adjustment ECS00940 NOTICE Be sure to slide the covers onto the short end of each hexagon wrench be- fore placing the wrenches in the tool kit. Securely tie the strap around the tool kit. 1. Fastener 2. Shroud 3.
  • Page 70 Periodic maintenance and adjustment Top cover (RS90GT / RS90LTGT) To remove the top cover Remove the shroud and the left side cov- er. (See the above procedures.) Remove the plastic band that is holding the auxiliary DC lead, and then discon- nect the auxiliary DC jack coupler.
  • Page 71 Periodic maintenance and adjustment 1. Quick fastener screw 1. Top cover 2. Top cover Tighten the quick fastener screws. Lift up the rear of the top cover, discon- Pass the brake hose, throttle cable, park- nect the main switch coupler, and then ing brake cable and wire harness through remove the cover.
  • Page 72 Periodic maintenance and adjustment Top cover (RST90GT) To remove the top cover Remove the shroud and the left side cov- er. (See the above procedures.) Disconnect the auxiliary DC jack coupler. 1. Windshield stay rubber cover Loosen the quick fastener screws. Lift up the rear of the top cover, discon- nect the main switch coupler, and then remove the cover.

  • Page 73: Opening And Closing The Shroud And Removing And Installing The Right Side Cover (Rst90)

    Periodic maintenance and adjustment 1. Shroud latch Tighten the quick fastener screws. 2. Shroud Place the windshield stay rubber covers To close the shroud in their original position. Slowly lower the shroud to its original position, Install the handlebar cover. and then hook the shroud latches.

  • Page 74: Checking The Spark Plugs

    Do not at- tempt to diagnose such problems yourself. Instead, take the snowmobile to a Yamaha dealer for inspection and possible repairs. You should periodically remove and inspect...

  • Page 75: Adjusting The Engine Idling Speed (Rst90)

    Periodic maintenance and adjustment When installing the spark plug, always clean ESU14071 Adjusting the throttle lever free the gasket surface. Wipe off any grime from play the threads and tighten the spark plug to the RS90GT / RS90LTGT specified torque. Place the snowmobile on a level surface Spark plug tightening torque: and apply the parking brake.
  • Page 76 Periodic maintenance and adjustment To increase the throttle lever free play, turn the adjusting bolt in direction (a). To decrease the throttle lever free play, turn the adjusting bolt in direction (b). 1. Slot 2. Projection Fit the weatherstrip on the headlight unit into the recess in the top of the air filter case cover.
  • Page 77 Periodic maintenance and adjustment Loosen the locknut. Unhook the headlight unit as shown, then To increase the throttle lever free play, lift it up and move it forward, away from turn the adjusting bolt in direction (a). To the handlebar. NOTICE: Be careful not decrease the throttle lever free play, turn to scratch the snowmobile when mov- the adjusting bolt in direction (b).

  • Page 78: Checking The Throttle Override System (T.o.r.s.)

    Periodic maintenance and adjustment ESU11863 Checking the throttle override system (T.O.R.S.) EWS00352 WARNING When checking the T.O.R.S., take precau- tions to avoid snowmobile movement which could cause an accident: Make sure that the throttle lever moves smoothly with the engine off before 1.

  • Page 79: Checking The Air Filter

    Yamaha dealer. Operating the snowmobile with a mal- functioning T.O.R.S. could result in loss of control.
  • Page 80 Periodic maintenance and adjustment Install the headlight unit, making sure to fit the slots on its bottom onto the projec- tions on its stay. 1. Air filter case cover fastener Lift up the air filter element frame and check the air filter element. If there is any 1.
  • Page 81 Periodic maintenance and adjustment Remove the air filter case cover by un- Place the air filter element frame in the hooking the case fastener and the case original position. cover fasteners. Install the air filter case cover and attach the air filter case by hooking all the fas- teners.
  • Page 82 Periodic maintenance and adjustment 1. Headlight unit Place the air filter element frame in the Remove the air filter case cover by un- original position, and then install the air hooking the fasteners. filter case cover by hooking the fasteners. Install the headlight unit, making sure to fit the slots on its bottom onto the projec- tions on its stay.

  • Page 83: Carburetors (Rst90)

    The carburetors are an important part of the sult a Yamaha dealer. The dealer can tell you engine and its emission control system, which if there are any changes necessary for the al- require very sophisticated adjustment.
  • Page 84 Periodic maintenance and adjustment [See page 63 (RS90GT / RS90LTGT / ECS00482 NOTICE RST90GT) or page 67 (RST90) for the Do not run the engine with too much or procedures.] not enough oil in the oil tank. Oil could Disconnect the oil level gauge coupler. spray out or the engine could be dam- NOTICE: Disconnect the oil level aged.
  • Page 85 Periodic maintenance and adjustment If the engine oil is below the “L” level mark, add sufficient oil of the recom- mended type to raise it to the “H” level mark. (See page 122 for the recommend- ed oil.) NOTICE: When adding the en- gine oil, be careful not to fill above the “H”...
  • Page 86 Periodic maintenance and adjustment RS90GT / RS90LTGT / RST90GT RST90 1. Oil level gauge coupler 1. Screw 2. Oil filler cap 2. Right lower cover Remove the oil filler cap and the cylinder Remove the bottom panel by removing head cap, and then remove the engine oil the bolts.
  • Page 87 RST90 1. Oil filter cartridge 1. Engine oil drain bolt (oil tank) 2. Gasket An oil filter wrench is available at a Yamaha Place an oil pan under the engine to col- dealer. lect the used oil. 10. Remove the engine oil drain bolt and its 12.
  • Page 88 Periodic maintenance and adjustment stick. NOTICE: When adding the en- gine oil, be careful not to fill above the “H” level mark on the dipstick. Use only the recommended oil. (See page 122.) Make sure that no foreign materi- al enters the engine oil tank. [ECS00462] RS90GT / RS90LTGT / RST90GT 1.

  • Page 89: Cooling System

    This procedure al- and have a Yamaha dealer check the lows any residual pressure to escape. snowmobile. Continuing to operate...
  • Page 90 RST90 against frost and corrosion. If water has been added to the coolant, have a Yamaha dealer check the antifreeze content of the coolant as soon as pos- sible, otherwise the effectiveness of the coolant will be reduced.
  • Page 91 The cooling system must be bled if the cool- ant reservoir becomes empty, if air can be seen in the cooling system, or if there is a cooling system leak. Consult a Yamaha deal- Recommended antifreeze: ECS00500 High-quality ethylene glycol antifreeze...
  • Page 92 Periodic maintenance and adjustment RST90 If you find any leaks, consult a Yamaha deal- Check the coolant level in the coolant reservoir. If it is not full, remove the cool- ant reservoir cap, fill the reservoir with the recommended coolant, and then install the cap.
  • Page 93 Check for any coolant leakage. If coolant is leaking, check for the cause. If you find any leaks, consult a Yamaha deal- Fill the coolant reservoir with coolant until 1. “COLD LEVEL” mark it reaches the “COLD LEVEL” mark.

  • Page 94: V-Belt

    Remove the shroud and the left side cov- sure proper clutch performance. er (RS90GT / RS90LTGT / RST90GT), Have a Yamaha dealer make this adjust- or open the shroud (RST90), and then re- ment. move the drive guard. (See page 27 for Place the snowmobile on a level surface drive guard removal procedures.)
  • Page 95 Periodic maintenance and adjustment RS90GT / RS90LTGT / RST90GT Remove the V-belt from the secondary sheave assembly and primary sheave assembly. Temporarily install the new V-belt on the secondary sheave assembly only, and then measure the V-belt position. Do not force the V-belt between the sheaves;...
  • Page 96 Periodic maintenance and adjustment 11. Rotate the secondary sliding sheave clockwise and push it so that it separates from the secondary fixed sheave. 1. Secondary sliding sheave 2. Secondary fixed sheave 12. Install the V-belt between the secondary sliding and fixed sheaves. 1.

  • Page 97: Drive Chain Housing

    Periodic maintenance and adjustment RS90GT / RS90LTGT / RST90GT RST90 1. Dipstick 1. Left lower cover Remove the dipstick and check that the 14. Install the drive guard, and then install the oil is between the maximum and mini- left side cover and the shroud (RS90GT / mum level marks on the “REVERSE”...

  • Page 98: Brake And Parking Brake

    Turn the chain tension adjusting bolt You could lose braking ability, which clockwise until it is finger tight, and then could lead to an accident. Ask a Yamaha loosen it 1/4 turn. dealer to inspect and repair the brake system.
  • Page 99 RST90GT) or page 67 (RST90) for the procedures.] Check the parking brake pads for wear by measuring the thickness of the pads. If 1. Brake pad wear limit the parking brake pads reach the wear limit, ask a Yamaha dealer to replace them.
  • Page 100 Periodic maintenance and adjustment 1. Parking brake pad wear limit 1. Parking brake pad adjusting bolt locknut 2. Parking brake pad adjusting bolt Parking brake pad wear limit: 3. Parking brake cable locknut 1.2 mm (0.047 in) 4. Parking brake cable adjusting bolt 5.

  • Page 101: Extrovert Drive Sprocket (Rs90Gt / Rs90Ltgt)

    Specified brake fluid: Check the skis and ski runners for wear and DOT 4 damage. Replace if necessary. Changing the brake fluid EWS00471 WARNING Make sure that the brake fluid and the fol- lowing parts are replaced by a Yamaha dealer.

  • Page 102: Steering System

    RS90LTGT 6.0 mm (0.24 in) RST90 8.0 mm (0.31 in) If the alignment is not correct, consult a RST90GT 8.0 mm (0.31 in) Yamaha dealer. Ski wear limit: ESU12164 RS90GT 12 mm (0.5 in) Steering system RS90LTGT 12 mm (0.5 in)
  • Page 103 NOTICE: Make sure that the pro- jection on the handlebar is not installed into the area shown. [ECS00571] If excessive free play is felt, consult a Yamaha dealer. RST90 To adjust the handlebar height Remove the handlebar cover.

  • Page 104: Drive Track And Slide Runners

    Periodic maintenance and adjustment age or failure could result in loss of braking ability and snowmobile control, which could cause an accident. Checking the drive track EWS00490 WARNING Do not operate the snowmobile if you find damage to the drive track, or if it has been maladjusted.
  • Page 105 Periodic maintenance and adjustment 1. Slide runner 1. Drive track deflection 2. Slide runner Measuring the drive track deflection Lay the snowmobile on its side. Standard drive track deflection: Measure the drive track deflection with a RS90GT 30.0–35.0 mm (1.18–1.38 spring scale.
  • Page 106 Periodic maintenance and adjustment Loosen the locknut on the left and the Shifted to left right sides of the snowmobile, then align the drive track by turning the adjusting bolt on each side. Drive track Shifted to Shifted to left alignment right Left adjusting...
  • Page 107 Periodic maintenance and adjustment Shifted to right 1. Rear axle nut 1. Forward Lift the rear of the snowmobile onto a suit- 2. Gap able stand to raise the drive track off the 3. Slide runner ground. 4. Drive track 5.

  • Page 108: Lubrication

    Periodic maintenance and adjustment Recheck alignment and deflection. If nec- EWS00511 WARNING essary, repeat steps 3 to 5 until the prop- Do not grease the throttle cable because it er adjustment is achieved. could become frozen, which could cause Lower the snowmobile to the ground. loss of control.

  • Page 109: Replacing A Headlight Bulb

    Periodic maintenance and adjustment RS90LTGT 1. Grease nipple 1. Grease nipple RST90 1. Grease nipple 1. Grease nipple RS90GT RST90GT 1. Grease nipple 1. Grease nipple ESU14181 Replacing a headlight bulb RS90GT / RS90LTGT Remove the top cover. (See page 63 for removal procedures.) Remove the screws, and then remove the headlight access panel.
  • Page 110 Periodic maintenance and adjustment 1. Screw 1. Bulb holder Install a new bulb, and then hook the bulb holder onto the headlight unit. NOTICE: Keep oil and your hands away from the glass part of the bulb or its life and illumination will be affected.
  • Page 111 Periodic maintenance and adjustment 1. Headlight coupler 1. Do not touch the glass part of the bulb. 2. Bulb holder cover Bulb type: Unhook the bulb holder, and then remove Halogen bulb the burnt-out bulb. Install the bulb holder cover, and then connect the headlight coupler.
  • Page 112 Periodic maintenance and adjustment illumination will be affected. If the glass is oil stained, thoroughly clean it with a cloth moistened with alcohol or lacquer thinner. [ECS00621] 1. Headlight unit Disconnect the headlight coupler. Remove the bulb holder cover. 1. Do not touch the glass part of the bulb. Bulb type: Halogen bulb Install the bulb holder cover, and then...

  • Page 113: Adjusting The Headlight Beams

    Periodic maintenance and adjustment 1. Weatherstrip 1. Headlight beam adjusting screw 11. Install the headlight unit bolts and wind- Install the top cover. shield stay bolts, and then tighten them to RST90 their specified torques. Open the shroud. Insert a Phillips screwdriver into the hole Tightening torques: under the shroud to turn the headlight Headlight unit bolt:...

  • Page 114: Fittings And Fasteners

    Always shield your eyes when working near batteries. KEEP OUT OF THE REACH OF CHILDREN. Charge or have a Yamaha dealer charge the battery as soon as possible if it seems to have discharged. Keep in mind that the battery tends to discharge more quickly if the snow- 1.

  • Page 115: Replacing A Fuse

    Periodic maintenance and adjustment RST90GT ESU14192 Replacing a fuse EWS00550 WARNING Be sure to use the specified fuse. A wrong fuse could cause electrical system dam- age or A FIRE HAZARD. ECS00631 NOTICE Be sure to turn the main switch to the off position and disconnect the negative bat- 1.
  • Page 116 Periodic maintenance and adjustment Lift up the air filter case, disconnect the ISC (Idle Speed Control) unit inlet hose and cylinder head breather hose from the case, and then remove the case. 1. Air filter case fastener 2. Air temperature sensor coupler Loosen the joint clamp bolts.
  • Page 117 Periodic maintenance and adjustment RS90GT / RS90LTGT 1. Negative battery lead 2 3 4 5 6 7 10. Replace the blown fuse with one of the proper amperage. 1. Fuse box 2. “IGN” (ignition) fuse 1. Spare fuse 3. “FAN” (radiator fan) fuse 2.
  • Page 118 Periodic maintenance and adjustment RST90GT Specified fuses: Main fuse: 40.0 A Fuel injection system fuse: 10.0 A Ignition fuse: 15.0 A Radiator fan fuse: RS90GT 5.0 A RS90LTGT 5.0 A Headlight fuse: 20.0 A Signaling system fuse: 2 7 3 4 5 6 7.5 A Auxiliary DC jack fuse: 3.0 A...
  • Page 119 If the fuse immediately blows again, ask a Yamaha dealer to inspect the snowmobile. RST90 The main fuse is located under the air filter case. The fuse box, which contains the fuses for the individual circuits, is located behind the right side cover.
  • Page 120 Periodic maintenance and adjustment 1. Crankcase breather hose clamp (crankcase 1. Main fuse side) 2. Spare main fuse 2. Crankcase breather hose Lift up the air filter case, slide the crank- case breather hose clamp (air filter case side) down, disconnect the crankcase breather hose from the air filter case, and then remove the air filter case.
  • Page 121 12. Install the right side cover and close the shroud. If the fuse immediately blows again, ask a Yamaha dealer to inspect the snowmobile.

  • Page 122: Troubleshooting

    • Clogged fuel line: Clean fuel line. ↓ • Clogged injector (RS90GT / RS90LTGT / RST90GT): Ask a Yamaha dealer to check. • Clogged carburetor (RST90): Clean carburetor. Fuel supplied to combustion chamber • Flooded engine (RS90GT / RS90LTGT / RST90GT): Crank engine or wipe spark plugs dry.
  • Page 123 (RS90GT / RS90LTGT / der: RST90GT), or open the shroud (RST90). Ask a Yamaha dealer to check. [See page 63 (RS90GT / RS90LTGT / Discharged battery RST90GT) or page 67 (RST90) for the If the battery is discharged, the engine can be procedures.]...
  • Page 124 Pull the black (–) connecting lead cover Faulty wire connections: Check connec- to expose the terminal through the slit in tions or ask a Yamaha dealer to check. the cover, and then connect the black (–) Discharged battery: Charge battery or see jumper cable to the black (–) connecting...
  • Page 125 Clean. RST90: Incorrect carburetor jetting for alti- Problem with driveline: See “V-belt twists” tude or temperature: Ask a Yamaha dealer above. to check. Engine does not upshift or downshift Improper fuel flow: See “Engine turns over properly or engages harshly but does not start–Fuel system”...

  • Page 126: Storage

    (gasohol) is used, completely fluid, antifreeze or electrolyte. drain the fuel system. Consult a Yamaha Do not use high-pressure washers or dealer if further information is needed. steam-jet cleaners since they cause wa-...
  • Page 127 [ECS00681] Surface protection tuned by a Yamaha dealer. The dealer has Apply a coat of wax to painted surfaces. Apply the experience and training to help you get suitable protectants to the exterior of the en-...

  • Page 128: Specifications

    Specifications ESU1246B Type: SAE 0W-30 Carburetor: Dimensions: Model × quantity: Overall length: RST90 CVK40 × 3 RS90GT 2805 mm (110.4 in) Fuel injection: RS90LTGT 3000 mm (118.1 in) ID mark: RST90 3135 mm (123.4 in) RS90GT 8JA1 00 RST90GT 3185 mm (125.4 in) RS90LTGT 8JA1 00 Overall width: RST90GT 8JA1 00...
  • Page 129 Specifications Overall reduction ratio: Engine oil quantity: RS90GT 6.02–1.58 :1 With oil filter cartridge replacement: RS90LTGT 6.18–1.63 :1 RS90GT 3.3 L (3.49 US qt, 2.90 Imp.qt) RST90 6.74–1.77 :1 RS90LTGT 3.3 L (3.49 US qt, 2.90 Imp.qt) RST90GT 6.44–1.70 :1 RST90 3.0 L (3.17 US qt, 2.64 Imp.qt) Sheave distance: RST90GT 3.3 L (3.49 US qt, 2.90 Imp.qt)
  • Page 130 Specifications Tail/brake light: RS90GT LED RS90LTGT LED RST90GT LED Meter lighting: RST90 14 V, 50 mA × 6 Meter lighting: RS90GT LED RS90LTGT LED RST90GT LED High beam indicator light: RST90 14 V, 80 mA × 1 High beam indicator light: RS90GT LED RS90LTGT LED RST90GT LED...

  • Page 131: Consumer Information

    Record the frame serial number, engine serial number (Primary ID), and key identification number in the spaces provided for assistance when ordering spare parts from a Yamaha dealer. Also, record and keep the ID numbers in a separate place in case the snowmobile is sto- len.

  • Page 132: Vehicle Emission Control Information Label

    Consumer information The Vehicle Emission Control Information la- bel is affixed at the location in the illustration. This label shows specifications related to ex- haust emissions as required by federal law, state law and Environment Canada. ESU13461 Vehicle Emission Control Infor- mation label RS90GT / RS90LTGT 1.

  • Page 133: Yamaha Motor Corporation, U.s.a. Snowmobile Limited Warranty

    WARRANTY PERIOD: WARRANTY TRANSFER: To transfer any remain- 1. All Yamaha snowmobiles shall be warranted for a ing warranty from the original purchaser to any subse- term of one (1) year from the date of purchase, plus quent purchaser, it is imperative that the machine be a special early-season extension (if applicable).
  • Page 134 Post Office Box 6555 specified in the Owner’s Manual? Cypress, California 90630 A. No. The warranty on a new Yamaha cannot be “voided” or “canceled.” However, if a particular failure is caused by operation or maintenance other than as shown in the Owner’s Manual, that failure may not be...

  • Page 135: Change Of Address

    If the dealer is not able to do so, he is expected to contact Yamaha Motor If you should move after you have purchased your new Corporation, U.S.A., for clarification or assistance.

  • Page 136: Yamaha Extended Service (Y.e.s.)

    Consumer information ESU12510 YAMAHA EXTENDED SERVICE (Y.E.S.)
  • Page 137 Index High beam indicator light......16 Air filter, checking........73 High-altitude settings........ 77 Auxiliary DC jack ........24 Identification numbers ......125 Backrest (RST90 / RST90GT) ....30 Battery............ 108 Location of the important labels ....1 Brake and parking brake ......92 Low coolant temperature indicator light ...
  • Page 138 Index Shroud and covers, removing and installing (RS90GT / RS90LTGT / RST90GT) ..63 Shroud and right side cover, opening and closing, removing and installing (RST90) ..........67 Skis and ski runners......... 95 Spark plugs, checking ......68 Specifications ......... 122 Starter (choke) lever (RST90) ....
  • Page 140 YAMAHA MOTOR CO., LTD. PRINTED IN JAPAN 2010.06-0.7×1 CR PRINTED ON RECYCLED PAPER...

This manual is also suitable for:

Rs venture rst90aVector rs90ltgtaRs venture rst90gta

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