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Yamaha RS90PB Owner's Manual

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OWNER'S MANUAL
Read this manual carefully
before operating this vehicle.
RS90PB
RS90PLTB
RST90B
RST90PGTB
LIT-12628-03-03
8HV-28199-10

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Summary of Contents for Yamaha RS90PB

  • Page 1 OWNER’S MANUAL Read this manual carefully before operating this vehicle. RS90PB RS90PLTB RST90B RST90PGTB LIT-12628-03-03 8HV-28199-10...
  • Page 2 ESU10041 Read this manual carefully before operating this vehicle. This manual should stay with this vehicle if it is sold.
  • Page 3 ©2011 by Yamaha Motor Corporation, U.S.A. It represents the high degree of craftsmanship 1st Edition, May 2011 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 V-belt holders ....... 29 Location of the important labels ..1 Passenger grips (RST90PGT) ..30 Passenger grip warmer switch Safety information ......6 (RST90 / RST90PGT) ....30 Passenger footrests Description ........9 (RST90 / RST90PGT) ....31 Backrest (RST90 / RST90PGT) ...
  • Page 6 Contents Adjusting the engine idling speed YAMAHA EXTENDED SERVICE (RST90) ........69 (Y.E.S.) ........131 Adjusting the throttle lever free play ..........69 Checking the throttle override system (T.O.R.S.) ..... 72 Checking the air filter ....73 Carburetors (RST90) ....77 High-altitude settings ....

  • 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- RS90P / RS90PLT...

  • Page 8: Location Of The Important Labels

    Location of the important labels RS90P / RS90PLT RST90 RST90PGT...
  • Page 9 Location of the important labels 1 RS90P / RS90PLT ATTENTION 8ET-2815K-10 1 RST90 NOTICE 8ET-2815K-00 1 RST90PGT 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 9 RS90P / RS90PLT 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. CHAIN CASE OIL TYPE 250 cm³...
  • Page 11 Location of the important labels 13 RS90PLT 14 RST90 / RST90PGT LOAD LIMIT / CHARGE LIMITE 10kg {22lbs} 8ET-24897-00 15 RST90 / RST90PGT LOAD LIMIT / CHARGE LIMITE 20kg {44lbs} 8FM-24897-01 16 RST90 / RST90PGT MAX. TOWING FORCE MAX. VERTICAL FORCE FORCE DE REMORQUAGE MAX.

  • Page 12: Safety Information

    Consult a Such use is prohibited by law, and you Yamaha dealer about any control or func- could collide with another vehicle. tion you do not understand. RS90P and RS90PLT are designed to carry Wear protective clothing.
  • Page 13 Many surfaces such as ice and hardpacked Yamaha dealer, have been designed, tested, snow require much longer stopping distanc- and approved by Yamaha for use on your es. Be alert, plan ahead and begin deceler- snowmobile. Many companies with no con- ating early.
  • Page 14 Safety information clothes dryers, and the like. Allow the en- gine to cool off before storing the snowmo- bile in an enclosed space.

  • Page 15: Description

    Description ESU10261 RS90P 1,2,3 5,6,7 RS90PLT 1,2,3 5,6,7 1. Battery 2. Main fuse 3. Air filter 4. Oil filler cap 5. Fuse box 6. Coolant reservoir 7. Coolant recovery tank 8. Storage compartment 9. Tool kit 10. Tail/brake light 11. Slide rail suspension 12.
  • Page 16 Description 10,12 1,2,3,4 7 8 9 19 13 14 RST90 1,2,3 9 10,11,12 13 RST90PGT 1. Battery 2. Main fuse 3. Air filter 4. Oil filler cap 5. Fuse box 6. Coolant reservoir 7. Passenger grip warmer switch 8. Passenger grip 9.
  • Page 17 Description RS90P / RS90PLT RST90 RST90PGT 3 11 2 3 5 1. Brake lever 8. Main switch 2. Parking brake lever 9. Shift lever 3. Grip warmer adjusting switch 10. Auxiliary DC jack 4. Thumb warmer adjusting switch 11. Headlight beam switch 5.

  • Page 18: 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 19: Throttle Override System (T.o.r.s.)

    RS90PLT / RST90PGT) or flashes (RST90) EWS00041 in the meter display. If this occurs, have a WARNING Yamaha dealer check the system as soon as If the T.O.R.S. is activated, make sure that possible. the cause of the malfunction has been cor-...

  • Page 20: 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 21 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 78 for the oil change procedure.) E LO 1. Odometer/tripmeter/fuel reserve tripmeter Pushing the “SELECT”...
  • Page 22 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 23: High Beam Indicator Light

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

  • Page 24: Low Coolant Temperature Indicator Light

    Control functions RS90P / RS90PLT / RST90PGT RS90P / RS90PLT / RST90PGT 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 25: Fuel Meter And Grip/Thumb Warmer Level Indicator

    Control functions RS90P / RS90PLT / RST90PGT ESU10426 Fuel meter and grip/thumb warmer level indicator The fuel meter and grip/thumb warmer level indicator have eight segments which show the amount of fuel remaining in the fuel tank, the grip warmer level, or the thumb warmer level.
  • Page 26 Control functions When the thumb warmer adjusting switch is RS90P / RS90PLT / RST90PGT pressed, the thumb warmer indicator comes on and the display switches to the thumb warmer level. See “Grip/thumb warmer adjusting switch” on page 24 for detailed information. RS90P / RS90PLT / RST90PGT 1.

  • Page 27: Fuel Level Warning Indicator

    If this occurs, have a Yamaha dealer inspect the snowmobile as soon as possible. RS90P / RS90PLT / RST90PGT 1.

  • Page 28: Oil Level/Pressure Warning Indicator (Rs90P / Rs90Plt / Rst90Pgt)

    If the oil level warning indicator and the warn- If the warning indicator and the warning light ing light still remain on, have a Yamaha dealer still remain on, have a Yamaha dealer check check the snowmobile. the snowmobile.

  • Page 29: Coolant Temperature Warning Indicator

    Do not continue to operate the engine if it plays (RS90P / RS90PLT / RST90PGT) or is overheating. flashes slowly (RST90) in the meter display. Note the error code, and then have a Yamaha dealer inspect the snowmobile as soon as possible. NOTICE: Do not continue to oper-...

  • Page 30: Engine Stop Switch

    Control functions ate the engine longer than necessary if there is an error code to avoid possible en- gine damage. [ECS00820] RS90P / RS90PLT / RST90PGT 1. Engine stop switch “ ” During the first few rides, practice using the stop switch so that you can react quickly in an emergency.

  • Page 31: Auxiliary Dc Jack

    Control functions RS90P / RS90PLT / RST90PGT See “Fuel meter and grip/thumb warmer level indicator” on page 19 for detailed information. ESU10696 Auxiliary DC jack The auxiliary DC jack is located in the front panel and can be used for accessories. The auxiliary DC jack can only be used if the engine is running.

  • Page 32: Helmet Shield Heater Jack (Rs90P / Rs90Plt / Rst90Pgt)

    Control functions After using the auxiliary DC jack, be sure to remove the accessory power plug from the jack and to close the auxiliary DC jack cap. ECS00122 NOTICE To avoid circuit overload and a possible fuse blowing, do not use accessories re- quiring more than the maximum rated capacity for the auxiliary DC jack.

  • Page 33: Parking Brake Lever

    Control functions 1. Brake lever ESU10593 Shift lever The shift lever is used to put the snowmobile When the brake lever is squeezed, the brake into forward or reverse. After coming to a light comes on. complete stop, pull the shift lever out, slide it to “FWD”...

  • Page 34: 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 NOTICE RST90 Do not use the shift lever while the snow- mobile is moving, otherwise the drive train could be damaged.

  • Page 35: 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 (RS90P / RS90PLT / RST90PGT), or under the shroud (RST90). [See page 63 (RS90P / RS90PLT / RST90PGT) or page 67 (RST90) for information on how to access the drive guard.]...

  • Page 36: Passenger Grips (Rst90Pgt)

    Control functions RS90P / RS90PLT / RST90PGT 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 37: Passenger Footrests (Rst90 / Rst90Pgt)

    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 RST90PGT securely after changing the position of the footrests. Do not overtighten the screws, other- wise the footrest may be damaged.

  • Page 38: Storage Compartment (Rs90P / Rs90Plt / Rst90Pgt)

    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 RST90PGT ESU14120 Storage compartment (RS90P / RS90PLT / RST90PGT) RS90P / RS90PLT...

  • Page 39: Storage Compartment

    Control functions To close the storage compartment Fold the storage compartment cover down, and then turn the fastener to the original posi- tion. RST90PGT This snowmobile is equipped with a storage compartment, which includes a storage pouch. Storage compartment 1. Storage compartment ECS00900 NOTICE The bottom of the storage compartment...

  • Page 40: 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 41 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 42: Tow Hitch Bracket (Rst90 / Rst90Pgt)

    Then, place the lever under the rear car- 1. Tow hitch bracket rier and secure it with the holder. A tow hitch is available at a Yamaha dealer. Tow weight limit: 120 kgf (264 lbf) Vertical weight limit:...

  • Page 43: Fuel

    Control functions ESU10605 Fuel EWS00071 WARNING Gasoline and gasoline vapors are ex- tremely flammable. To avoid fires and ex- plosions and to reduce the risk of injury when refueling, follow these instructions. Make sure there is sufficient gasoline in the tank.

  • Page 44: 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 45 Control functions Loosen the locknut. Tighten the locknut to the specified To increase the spring preload and there- torque. NOTICE: Always tighten the by harden the suspension, turn the ad- locknut against the adjusting nut, and justing nut in direction (a). To decrease then tighten the locknut to the speci- the spring preload and thereby soften the fied torque.
  • Page 46 Control functions The spring preload setting is determined by measuring distance A, shown in the illustra- tion. The longer distance A is, the higher the spring preload; the shorter distance A is, the lower the spring preload. Spring preload setting*: Minimum (soft): RST90 111.5 mm (4.39 in) RST90PGT 122.1 mm (4.81 in)
  • Page 47 Control functions ESU13094 Adjusting the 2-up adjusting blocks (RST90) EWS00760 WARNING Make sure that the 2-up adjusting blocks are installed in the same position on both sides of the snowmobile, otherwise poor handling and loss of stability may result. The spring force can be adjusted by changing 1.
  • Page 48 Control functions 1. 2-up position (rider and passenger) 1. Compression damping force adjusting knob 2. Solo rider position Compression damping force setting: 3. Special tool Minimum (soft): 4. Lock pin 12 click(s) in direction (b)* Pull the lock pin and turn the special tools Standard: 6 click(s) in direction (b)* to change the block position.
  • Page 49 Control functions 1. Rebound damping force adjusting knob 1. Special wrench corner 2. Control rod adjuster Rebound damping force setting: 3. Scale range Minimum (soft): 4. Special wrench 20 click(s) in direction (b)* 5. Control rod length Standard: 11 click(s) in direction (b)* Maximum (hard): Use the special wrench in the owner’s tool kit 3 click(s) in direction (b)*...
  • Page 50 Control functions Make sure that the special wrench is securely fitted on the locknut. 1. Special wrench Locknut tightening torque: 35 Nm (3.5 m·kgf, 25 ft·lbf) RST90 / RST90PGT EWS00770 WARNING 1. Locknut The left and right adjusting nuts must be 2.
  • 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 18 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- A broken track, track fittings, or debris tion on page 6. thrown by the track could be danger- Please read all warning and notice labels on ous to bystanders. [EWS00690] your snowmobile. Also, read the Snowmobil- Braking er’s Safety Handbook that is supplied with EWS00220...
  • Page 58 Operation er speeds or in tighter curves. Lean more as the turn gets sharper or is made at higher speeds. 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.
  • 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

    Operation track, slide runners, and drive sprockets. Op- ESU11350 Maximizing drive track life eration of the snowmobile on the following surfaces should be avoided at all times: Recommendations Dirt Track tension Sand During initial break-in, the new drive track will Rocks tend to stretch quickly as the track settles.

  • Page 61: Driving

    Operation around the already weakened area. To mini- RS90P / RS90PLT / RST90PGT mize possible damage, consult your stud manufacturer for installation and stud pattern recommendations. Yamaha does not recommend track stud- ding. ESU11395 Driving EWS00300 WARNING Be sure to read the “SAFETY INFORMA- 1.

  • 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

    RS90P / RS90PLT / 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 32 for information check the torque settings and adjust them if on how to access the storage compartment.)

  • Page 69: Recommended Equipment

    If you do not have a torque wrench available shroud and covers (RS90P / during a service operation requiring one, take RS90PLT / RST90PGT) your snowmobile to a Yamaha dealer to EWS00091 check the torque settings and adjust them if WARNING necessary.
  • Page 70 Periodic maintenance and adjustment 1. Shroud stay Fit the projections on the side cover into the slots as shown. Left and right side covers To remove a side cover Remove the shroud. (See the above pro- cedure.) Loosen the fasteners, pull outward on the areas shown, and then slide the side cov- er forward to remove it.
  • Page 71 Periodic maintenance and adjustment Remove the screws, and then remove To install the top cover the cable guide. Connect the main switch coupler. Place the top cover in the original posi- tion, making sure to fit the projections on the cover into the slots in the headlight unit.
  • Page 72 Periodic maintenance and adjustment When installing the shroud and covers, be sure to tighten the fasteners secure- Top cover (RST90PGT) 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.

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

    Periodic maintenance and adjustment Shroud To open the shroud Unhook the shroud latches, and then slowly raise the shroud forward until it stops. Tighten the quick fastener screws. Place the windshield stay rubber covers in their original position. Pass the brake hose, throttle cable, park- 1.

  • 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

    Periodic maintenance and adjustment Spark plug gap: Standard engine idling speed: 0.7–0.8 mm (0.028–0.031 in) 1300–1500 r/min When installing the spark plug, always clean Close the shroud. the gasket surface. Wipe off any grime from ESU14071 Adjusting the throttle lever free the threads and tighten the spark plug to the play specified torque.
  • Page 76 Periodic maintenance and adjustment Loosen the locknut. 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 Open the shroud. Loosen the locknut. 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. Headlight unit bolt 2.

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

    Periodic maintenance and adjustment 1. Locknut 1. Weatherstrip 2. Throttle lever free play adjusting bolt 10. Install the headlight unit bolts and wind- 3. Throttle lever free play shield stay bolts, and then tighten them to their specified torques. Throttle lever free play: 2.0–3.0 mm (0.08–0.12 in) Tightening torques: Headlight unit bolt:...

  • 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 RS90P / RS90PLT Place the snowmobile on a level surface and apply the parking brake. Remove the shroud, the left and right side covers, and the top cover. (See page 63 for removal procedures.) Remove the headlight unit bolt on each side of the snowmobile.
  • Page 81 Periodic maintenance and adjustment Install the headlight unit, making sure to Remove the air filter case cover by un- fit the slots on its bottom onto the projec- hooking the case fastener and the case tions on its stay. cover fasteners. 1.
  • Page 82 Periodic maintenance and adjustment Place the air filter element frame in the original position. Install the air filter case cover and attach the air filter case by hooking all the fas- teners. Close the shroud. RST90PGT Place the snowmobile on a level surface and apply the parking brake.

  • Page 83: Carburetors (Rst90)

    Common problems are hard starting, bogging, and plug fouling. Proper carburetion adjustments will correct the air/fuel ratio. Be sure to have a Yamaha dealer make these adjustments. 1. Weatherstrip...

  • Page 84: Valve Clearance

    800 km (500 mi) of sult a Yamaha dealer. The dealer can tell you operation, and every 20000 km (12000 if there are any changes necessary for the al- mi) of operation thereafter.
  • Page 85 Periodic maintenance and adjustment Remove the shroud and the right side cover (RS90P / RS90PLT / RST90PGT), or open the shroud (RST90). [See page 63 (RS90P / RS90PLT / RST90PGT) or page 67 (RST90) for the procedures.] Disconnect the oil level gauge coupler. NOTICE: Disconnect the oil level gauge coupler before removing the oil filler cap, otherwise the cable could...
  • Page 86 Periodic maintenance and adjustment If the engine oil is below the “L” level RS90P / RS90PLT / RST90PGT mark, add sufficient oil of the recom- mended type to raise it to the “H” level mark. (See page 123 for the recommend- ed oil.) NOTICE: When adding the en- gine oil, be careful not to fill above the “H”...
  • Page 87 Periodic maintenance and adjustment RS90P / RS90PLT / RST90PGT RST90 1. Cylinder head cap 1. Oil level gauge coupler 2. Oil filler cap RST90PGT RST90 1. Cylinder head cap 1. Oil level gauge coupler RS90P / RS90PLT / RST90PGT 2. Oil filler cap Remove the oil filler cap and the cylinder head cap, and then remove the engine oil drain bolt and its gasket to drain the oil...
  • Page 88 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 89 Periodic maintenance and adjustment RST90 Tightening torques: Engine oil drain bolt (crankcase): 10 Nm (1.0 m·kgf, 7.2 ft·lbf) Engine oil drain bolt (oil tank): 16 Nm (1.6 m·kgf, 12 ft·lbf) 15. Add 2.0 L (2.11 US qt, 1.76 Imp.qt) of the recommended engine oil to the oil tank, and then install and tighten the oil filler cap and the cylinder head cap.

  • Page 90: Cooling System

    This procedure al- and have a Yamaha dealer check the lows any residual pressure to escape. snowmobile. Continuing to operate When the hissing sound has stopped,...
  • Page 91 (See page 63 for removal proce- seen in the cooling system, or if there is a dures.) cooling system leak. Consult a Yamaha deal- Check the coolant level in the coolant re- covery tank when the engine is cold. If the ECS00500 coolant level is below the “COLD LEVEL”...
  • Page 92 Periodic maintenance and adjustment 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 The cooling system must be bled if the cool- ant reservoir becomes empty, if air can be seen in the coolant reservoir, or if there is a cooling system leak. Consult a Yamaha deal- 1. “COLD LEVEL” mark 2. Coolant reservoir cap...

  • Page 94: V-Belt

    Check the V-belt for wear and damage. engine. Replace if necessary. 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 it reaches the “COLD LEVEL” mark.
  • Page 95 As the V-belt wears, the position of the V- belt will change. If the V-belt position is out of specification, it must be adjusted to en- sure proper clutch performance. Have a Yamaha dealer make this adjust- 1. Secondary sliding sheave ment. 2. Secondary fixed sheave...
  • Page 96 Periodic maintenance and adjustment Standard V-belt position: From 1.5 mm (0.06 in) above the edge of the secondary sheave as- sembly to 0.5 mm (0.02 in) below the edge If the V-belt position is incorrect, adjust it by removing or adding a spacer on each V-belt position adjusting bolt.

  • Page 97: Drive Chain Housing

    Periodic maintenance and adjustment Tighten the V-belt position adjusting RS90P / RS90PLT / RST90PGT bolts. V-belt position adjusting bolt tightening torque: 10 Nm (1.0 m·kgf, 7.2 ft·lbf) 10. Install the V-belt over the primary sheave assembly. 11. Rotate the secondary sliding sheave clockwise and push it so that it separates from the secondary fixed sheave.
  • Page 98 Periodic maintenance and adjustment RST90 Recommended drive chain oil: SAE 75W or 80W API GL-3 Gear oil Install the dipstick, making sure to align the notch in the dipstick handle with the projection on the drive chain housing. 1. Dipstick Remove the dipstick and check that the oil is between the maximum and mini- mum level marks on the “REVERSE”...

  • Page 99: Brake And Parking Brake

    1. Brake pad wear limit You could lose braking ability, which could lead to an accident. Ask a Yamaha Brake pad wear limit: dealer to inspect and repair the brake 7.5 mm (0.30 in) system.
  • Page 100 Check the parking brake pads for wear by measuring the thickness of the pads. If the parking brake pads reach the wear limit, ask a Yamaha dealer to replace them. 1. Parking brake pad adjusting bolt locknut 2. Parking brake pad adjusting bolt 3.

  • Page 101: Extrovert Drive Sprocket (Rs90P / Rs90Plt / Rst90Pgt)

    If the brake fluid level goes down suddenly, have a Yamaha dealer check the cause before further riding. Changing the brake fluid 1.

  • Page 102: Skis And Ski Runners

    Periodic maintenance and adjustment To measure the drive sprocket wear Measure the drive sprocket tooth width at the measuring line shown. If the tooth width is 13 mm (0.51 in) or less, replace the drive sprock- 1. Ski wear limit 2.

  • Page 103: Steering System

    Turn the handlebar slightly to the right tion. NOTICE: Make sure that the pro- and left. jection on the handlebar is not installed into the area shown. [ECS00571] If excessive free play is felt, consult a Yamaha dealer.

  • Page 104: Drive Track And Slide Runners

    Periodic maintenance and adjustment ESU13702 Drive track and slide runners Drive track EWS00481 WARNING A broken track, track fittings or debris thrown by the drive track could be danger- ous to an operator or bystanders. Observe the following precautions: Do not allow anyone to stand behind the snowmobile when the engine is running.
  • Page 105 Periodic maintenance and adjustment Adjust or replace if necessary. (See the fol- lowing section for more details.) 1. Spring scale Checking the drive track alignment Measure the gap between the slide runner Lift the rear of the snowmobile onto a suit- and the edge of the track window on both able stand to raise the drive track off the sides.
  • Page 106 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 107 Periodic maintenance and adjustment Tighten the locknuts to their specified torque. Locknut tightening torque: 59 Nm (5.9 m·kgf, 43 ft·lbf) Recheck alignment and deflection. If nec- essary, repeat steps 3 to 6 until the prop- er adjustment is achieved. Lower the snowmobile to the ground. Tighten the rear axle nut.

  • Page 108: Lubrication

    Periodic maintenance and adjustment Shifted to left 1. Slide runner 1. Forward 2. Wear limit height 2. Gap 3. Slide runner Slide runner wear limit height: 4. Drive track 10.5 mm (0.41 in) 5. Slide metal ECS00350 Adjust the drive track deflection to speci- NOTICE fication.
  • Page 109 Periodic maintenance and adjustment 1. Lubrication point 1. Grease nipple RS90P 1. Throttle cable end 1. Grease nipple RS90PLT 1. Grease nipple 1. Grease nipple...

  • Page 110: Replacing A Headlight Bulb

    Periodic maintenance and adjustment RST90 1. Screw 1. Grease nipple 2. Headlight access panel Disconnect the headlight coupler. RST90PGT Remove the bulb holder cover. 1. Grease nipple 1. Headlight coupler ESU14181 Replacing a headlight bulb 2. Bulb holder cover Unhook the bulb holder, and then remove RS90P / RS90PLT the burnt-out bulb.
  • Page 111 Periodic maintenance and adjustment the glass part of the bulb or its life and illumination will be affected. If the glass is oil stained, thoroughly clean it with a cloth moistened with alcohol or lacquer thinner. [ECS00621] 1. Bulb holder Install a new bulb, and then hook the bulb holder onto the headlight unit.
  • Page 112 Periodic maintenance and adjustment Unhook the bulb holder, and then remove the burnt-out bulb. 1. Headlight unit bolt 2. Windshield stay bolt 1. Bulb holder Unhook the headlight unit as shown, then lift it up and move it forward, away from Install a new bulb, and then hook the bulb the handlebar.

  • Page 113: Adjusting The Headlight Beams

    Periodic maintenance and adjustment Use a Phillips screwdriver to turn the headlight beam adjusting screw and ad- just the headlight beams. To lower the headlight beams, turn the headlight beam adjusting screw in direction (a). To raise the headlight beams, turn the head- light beam adjusting screw in direction (b).

  • 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 RST90PGT ESU14193 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 RS90P / RS90PLT 1. Negative battery lead 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. Fuel injection system fuse 4.
  • Page 118 Periodic maintenance and adjustment RST90PGT Specified fuses: Main fuse: 40.0 A EPS fuse: 40.0 A Fuel injection system fuse: 10.0 A Ignition fuse: 15.0 A Radiator fan fuse: RS90P 5.0 A RS90PLT 5.0 A Headlight fuse: 2 7 3 4 5 6 20.0 A Signaling system fuse: RS90P 3.0 A...
  • Page 119 14 Nm (1.4 m·kgf, 10 ft·lbf) connect the oil tank breather hose. 17. Install the top cover, the left and right side covers, and the shroud. If the fuse immediately blows again, ask a Yamaha dealer to inspect the snowmobile.
  • Page 120 Periodic maintenance and adjustment 1. Oil tank breather hose clamp 1. Crankcase breather hose clamp (air filter case side) 2. Oil tank breather hose Disconnect the negative battery lead. Slide the crankcase breather hose clamp Replace the blown fuse with one of the (crankcase side) up, and then disconnect proper amperage.
  • 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. 1. Fuse box 2. “HEAD” (headlight) fuse 3. “SIG” (signaling system) fuse 4.

  • Page 122: Troubleshooting

    • Clogged fuel line: Clean fuel line. ↓ • Clogged injector (RS90P / RS90PLT / RST90PGT): Ask a Yamaha dealer to check. • Clogged carburetor (RST90): Clean carburetor. Fuel supplied to combustion chamber • Flooded engine (RS90P / RS90PLT / RST90PGT): Crank engine or wipe spark plugs dry.
  • Page 123 • Worn or damaged piston and cylin- to the off position. der: Remove the shroud and the right side Ask a Yamaha dealer to check. cover (RS90P / RS90PLT / RST90PGT), or open the shroud (RST90). [See page Discharged battery...
  • Page 124 Electric starter does not operate or operates slowly Engine stop switch is pushed in: Pull it out. Faulty wire connections: Check connec- tions or ask a Yamaha dealer to check. Discharged battery: Charge battery or see “Discharged battery” above.
  • Page 125 Remove spark plugs and turn en- Yamaha dealer to check. gine over several times with ignition off to V-belt twists expel excess fuel. Ask a Yamaha dealer to Improper V-belt: Replace with correct V- check. belt. Engine power is low...
  • Page 126 Troubleshooting Worn or damaged drive track: Ask a Yamaha dealer to check.

  • Page 127: Storage

    Do not use high-pressure washers or oxygenated fuel (gasohol) is used, completely steam-jet cleaners since they cause wa- drain the fuel system. Consult a Yamaha ter seepage and deterioration in the fol- dealer if further information is needed. lowing areas: seals (of the slide rail...
  • Page 128 Yamaha dealer. The dealer has the experience and training to help you get Battery the maximum performance and use out of Remove the battery from the snowmobile.

  • Page 129: Specifications

    Specifications ESU1246C Recommended brand: YAMALUBE Type: Dimensions: SAE 0W-30 Overall length: Carburetor: RS90P 2815 mm (110.8 in) Model × quantity: RS90PLT 3015 mm (118.7 in) RST90 CVK40 × 3 RST90 3135 mm (123.4 in) Fuel injection: RST90PGT 3195 mm (125.8 in) ID mark: Overall width: RS90P 8JA1 00...
  • Page 130 Specifications Overall reduction ratio: Engine oil quantity: RS90P 6.02–1.58 : 1 With oil filter cartridge replacement: RS90PLT 6.18–1.63 : 1 RS90P 3.3 L (3.49 US qt, 2.90 Imp.qt) RST90 6.74–1.77 : 1 RS90PLT 3.3 L (3.49 US qt, 2.90 Imp.qt) RST90PGT 6.44–1.70 : 1 RST90 3.0 L (3.17 US qt, 2.64 Imp.qt) Sheave distance:...
  • Page 131 Specifications Tail/brake light: RS90P LED RS90PLT LED RST90PGT LED Meter lighting: RST90 14 V, 50 mA × 6 Meter lighting: RS90P LED RS90PLT LED RST90PGT LED High beam indicator light: RST90 14 V, 80 mA × 1 High beam indicator light: RS90P LED RS90PLT LED RST90PGT LED...

  • Page 132: 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 133: Vehicle Emission Control Information Label

    Consumer information RST90PGT ESU13461 Vehicle Emission Control Infor- mation label RS90P / RS90PLT 1. Vehicle Emission Control Information label 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.

  • Page 134: 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 135 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 136: 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 137 Consumer information ESU12511 YAMAHA EXTENDED SERVICE (Y.E.S.)
  • Page 138 Index Helmet shield heater jack Air filter, checking........73 (RS90P / RS90PLT / RST90PGT) ..26 Auxiliary DC jack ........25 High beam indicator light......17 High-altitude settings........ 77 Backrest (RST90 / RST90PGT) ....31 Battery............ 108 Identification numbers ......126 Brake and parking brake ......
  • Page 139 Index Shroud and right side cover, opening and closing, removing and installing (RST90) ..67 Skis and ski runners......... 96 Spark plugs, checking ......68 Specifications ......... 123 Starter (choke) lever (RST90) ....12 Starting the engine ........48 Steering system ........97 Stopping the engine .........
  • Page 141 Genuine Yamaha Accessories – Yamaha only offers accessories that meet our high standards for quality and performance. Buy with confidence, knowing your Genuine Yamaha Accessories will fit right and perform right – right out of the box. Yamalube – Take care of your Yamaha with legendary Yamalube oils, lubricants, and care products.
  • Page 142 PRINTED IN JAPAN 2011.05-0.8×1 CR PRINTED ON RECYCLED PAPER...

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