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GPX MOTO GPX 250r TSE Maintenance Manual

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GPX 250r TSE
Maintenance Manual
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  • Page 1 GPX MOTO GPX MOTO GPX 250r TSE Maintenance Manual WWW.GPXMOTO.COM WWW.GPXMOTOUK.COM - 1 - www.GPXMOTO.com + www.GPXMOTOUK.com...
  • Page 2 GPX MOTO This service manual is edited by GPXMOTO No part of this publication may be reproduced without authorization. GPXMOTO reserves the right to make changes at any time without notice and without incurring any obligation. The vehicle pictured in this owner’s manual may not match your actual vehicle.
  • Page 3 GPX MOTO PREFACE Congratulations on your purchase of a GPX motorcycle. We believe that you have made an excellent choice ,which will give you great and reliable performance. This Handbook and Manual will give you an understanding of our product. It has detailed the complete range of specialized maintenance and adjustment schedules as well as the procedures required.
  • Page 4 GPX MOTO MEANINGS OF REPRESENTATION All work requires specialist knowledge and technical understanding. If you do not have the skill or confidence to perform that, you must go to an authorized GPX workshop or GPX after-sale service point. There, your motorcycle will be optimally cared for by specially trained experts using the specialist tools required.
  • Page 5 GPX MOTO If you crash the motorcycle, check the condition of the motorcycle before you resume your journey. Ignoring this advice could easily lead to an accident and endanger your own safety as well as others , as you may be riding a broken or faulting motorcycle .
  • Page 6 GPX MOTO APPEARANCE TSE 250R COMPONENTS AND POSITIONS www.GPXMOTO.com + www.GPXMOTOUK.com - 6 -...
  • Page 7 GPX MOTO Name Name Front fender Front brake caliper Headlight Front shock Handlebar Fuel tank Vent pipe Carburettor Fuel tank cap Gear shift lever Fuel tank petcock Pedal Air filter cover Chain Chain guide cover Chain guide Front disc brake cover Rear sprocket www.GPXMOTO.com + www.GPXMOTOUK.com...
  • Page 8 GPX MOTO www.GPXMOTO.com + www.GPXMOTOUK.com - 8 -...
  • Page 9 GPX MOTO Name Name Tail light Rear brake caliper Rear fender Aluminium swinging arm Exhaust silencer Triangle rocker arm Seat U-shape rocker arm Rear shock Rear brake oil cup Upper clamp Brake pedal Cooling water tank Exhaust pipe Lower clamp...

  • Page 10: Chassis Number

    GPX MOTO VIN CODE Vin code of the TSE 250r ,is located on the head stock. CHASSIS NUMBER Chassis Number of TSE 250r is located on the headstock/frame/chassis under the handlebars ENGINE NUMBER www.GPXMOTO.com + www.GPXMOTOUK.com - 10 -...
  • Page 11 GPX MOTO The engine number of TSE 250r is located on the engine case behind the cylinder block. www.GPXMOTO.com + www.GPXMOTOUK.com - 11 -...
  • Page 12 GPX MOTO PARAMETER DIMENSIONS AND SPECIFICATION - TSE 250R 2180×820×1254 L*W*H（mm） 1480mm Wheelbase（mm） Net weight（kg） Tire size F: 80/100-21；R: 110/100-18. Rear will accept a 140 80/90 18” Enduro or MX tyre 939mm. This can be reduced by 55mm to 884mm by using the 2 lower Seat height（mm）...
  • Page 13 GPX MOTO compression and rebound. Seals , dust seal and range of springs available (after market), L=950mm. Compression recovery dual adjustable nitrogen airbag rear shock, Rear shock L=480mm, 300mm travel , CRF general configuration.Quality high performance unit with spring preload, adjustable compression as well as...
  • Page 14 GPX MOTO Competitive high-strength aluminium alloy fat bar (imported),，material Handlebar 7075 Φ28.6mm, with GPX special ultra-soft off-road grip 1.60×21, 2.15×18, 7050 high strength aluminium rim ， F/R rims forged CNC wheel hub Powerful Hydraulic alloy twin piston caliper with 260mm disc...

  • Page 15: Front Disc Brake

    GPX MOTO CONTROL CLUTCH The clutch is controlled by the clutch lever, which is fitted on the left side of the handlebar. By adjusting 2 the screws indicated you can change the biting point of the clutch and the distance between the clutch lever and handlebar to your preference.
  • Page 16 GPX MOTO www.GPXMOTO.com + www.GPXMOTOUK.com - 16 -...

  • Page 17: Throttle Lever

    GPX MOTO THROTTLE LEVER The throttle lever is located on the right side of the handlebar. The throttle is very sensitive. Turn the throttle counter clockwise to increasing the engine speed and power ouput. The reverse will reduce the engine speed and power output. It will back to normal smoothly once you lease the handle.
  • Page 18 GPX MOTO FUEL TANK SWITCH The fuel tank switch is located on the bottom left side of the fuel tank. By turning the switch, you can control the entrance of the fuel into into the carburettor. fuel tank switch The meaning of symbols on the oil tank switch is shown as the left picture.

  • Page 19: Rear Disc Brake

    GPX MOTO REAR DISC BRAKE The rear brake pedal is located on the right side of the engine and is operate by pushing down on it gently using the right foot. The rear brake adopts a floating caliper disc brake. This is located on the right side of the rear wheel and fixed by a disc brake bracket.
  • Page 20 GPX MOTO www.GPXMOTO.com + www.GPXMOTOUK.com - 20 -...

  • Page 21: Preparing For Use

    GPX MOTO PREPARING FOR USE ADVICE ON FIRST USE 1. Before your first trip, read the entire operating instructions carefully, especially the section of “Controls” and “Riding Instructions”. 2. When driving, please carry out a standardized run-in period first. 3. If any parts problems are found during using, you can repair that according to this manual or contact GPX Dealers for professional aid.

  • Page 22: Riding Instructions

    GPX MOTO RIDING INSTRUCTIONS PREPARATION BEFORE RIDING 1. Check fuel level in fuel tank and replenish if necessary. 2. Check fluid level in front brake fluid reservoir and replenish if necessary. 3. Check fluid level in rear foot brake fluid reservoir and replenish if necessary.
  • Page 23 GPX MOTO PRECAUTIONS FOR TURNING 1. Take care to slow down in advance conditions when turning 2. Lower your centre of gravity to reduce the risk of side rolling when turning 3. Do not shift gears when turning PRECAUTIONS FOR ACCELERATION 1.
  • Page 24 GPX MOTO SUGGESTED INSPECTION TIME FOR ALL PARTS OF THE VEHICLE every 30 hours every 20 hours every 10 hours/after every race 1 hour after each ride Check and charge the battery ● ● ● Check the front disc brake ●...

  • Page 25: Suspension System

    GPX MOTO SUSPENSION SYSTEM CHECK THE COMPRESSION AND REBOUND OF THE VEHICLE WITH THE RIDER ON BOARD To ensure the best driving characteristics of the vehicle and avoid damage to swingarm, shock absorbers, linkage and frame, the basic setting of the suspension components must match the driver's weight.
  • Page 26 GPX MOTO www.GPXMOTO.com + www.GPXMOTOUK.com - 26 -...
  • Page 27 GPX MOTO ADJUSTING THE REBOUND DAMPING OF THE REAR SHOCK ABSORBER You can adjust the rebound damping by adjusting the screw with a flat bladed screwdriver. Turn counter clockwise to decrease rebound damping(fast), or turn clockwise to increase rebound damping(slow)
  • Page 28 GPX MOTO MEASURE DISTANCE BETWEEN REAR WHEEL CENTER AND REAR FENDER IN DRIVING CONDITION The measurement procedure is as follows: 1. The driver rides the motorcycle (the engine does not start) 2. Up right the motorcycle so that the centre surface of the tire is perpendicular to the ground 3.

  • Page 29: Adjusting The Handlebar

    GPX MOTO If it is difficult to rebound the front shock absorber, decrease the rebound damping appropriately. When the ambient temperature is high, the front shock absorber should also be properly bled of air using the bleed button on the top of the fork cap. Push the bleed button for 5 seconds to release all of the air.
  • Page 30 GPX MOTO The handlebars of the vehicle can be adjusted according to the customer’s driving habits. The specific steps are as follows: 1. Remove the handlebar cover and handlebar pad on the handlebar. 2. Loosen the bolts securing the upper handlebar clamp so that the handlebar can be turned.
  • Page 31 GPX MOTO VEHICLE MAINTENANCE PLACEMENT Raise you motorcycle on its centre stand always when carrying out the related maintenance. It is helpful to remove or install various parts. REMOVING OR INSTALLING THE DISC BRAKE COVER Removing steps are as follows: 1.
  • Page 32 GPX MOTO REMOVING OR INSTALLING THE FRONT BRAKE DISC CALIPER Removing Steps are as follow: 1. Remove the front brake fluid hose clamp from the left fork protection guard. 2. Remove the front brake master cylinder from the handlebars. 3. Remove the front disc brake caliper.
  • Page 33 GPX MOTO Removing Steps are as follows: 1. Remove the headlight 2. Remove the front wheel 3. Remove the front brake caliper 4. Remove both front forks 5. Remove the handlebars 6. Remove the lock nut and the punch bolt of the steering column as indicated 7.
  • Page 34 GPX MOTO CHECK THE FRONT STEERING Check the front steering steps are as follows: 1. Put the GPX on a stand lifting both wheels off the ground. 2. Turning the handlebars left to right to control . It should move smoothly and there should be no obstruction.
  • Page 35 GPX MOTO REMOVING OR INSTALLING FRONT HEADLIGHT Removing Steps are as follows: 1. Remove or loosen the rubber fixing strap on both the left and right fork suspension leg. 2. Remove the headlight 3. Pull out the connector between headlight and main...
  • Page 36 GPX MOTO Removing Steps are as follows: 1. Remove the 2 fixing screws. 2. Pull out the Front Fender. Installing Steps: The instalment should be carried out in the reverse order of removal. - 35 - www.GPXMOTO.com + www.GPXMOTOUK.com...
  • Page 37 GPX MOTO REMOVING OR INSTALLING THE REAR SHOCK ABSORBER Check the rear shock absorber to determine the performance of the unit. Please follow the steps below to removing the rear shock absorber: 1. Remove the rear silencer. 2. Remove the upper and lower mounting bolts of the rear shock absorber and the sub frame bolts.
  • Page 38 GPX MOTO REMOVING OR INSTALLING THE AIR FILTER HOUSING Removing Steps are as follows: 1. Place the left hand fingers behind the cover at position A. 2. Place the right hand fingers behind the cover at position B. 3. Pull smoothly but with good pressure.
  • Page 39 GPX MOTO CLEANING AND MAINTENANCE OF AIR FILTER Before performing maintenance on the air filter parts, it is necessary to check the filter first. Follow this direction: 1. Check whether there are cracks on the surface of the air filter rubber hose that connect the carburettor to the air box.
  • Page 40 GPX MOTO REMOVING OR INSTALLING THE REAR SILENCER The exhaust pipe and the silencer can guide the gas emission and reduce the noise. If the exhaust pipe is rusty or ruptured or damaged by impact, please replace it with a new one immediately. If...
  • Page 41 GPX MOTO Removing steps as below: 1. Remove the seat . 2. Remove the left and right radiator shroud screws. 3. Unscrew the single central fuel tank installation screw. 4. Remove the fuel tank from the frame. Installing Steps: The instalment should be carried out in the reverse order of removal.
  • Page 42 GPX MOTO CHECK AND CLEAN THE CHAIN Checking the condition of the chain: 1. Observe the chain from the rear of the vehicle to check whether the chain is skewed as a whole 2. Rotate the rear wheel by hand and observe whether...
  • Page 43 GPX MOTO CHECK AND ADJUST THE CHAIN TENSION The chain transfers the power output from the engine to the wheels. It is therefore important that the chain is in good condition , is well lubricated and works correctly. It is an important part of the motorcycle. The chain needs frequent inspection and maintenance to ensure its normal use.
  • Page 44 GPX MOTO When checking the chain tension, you should also check the plastic chain guides, the chain split link and both front and rear sprocket for wear or damage . When the chain is over-used, or the stretch exceeds 2%, the chain should be replaced. Replace and change the relevant guide rail and both sprockets at the same time.
  • Page 45 GPX MOTO CHECK THE STRUCTURE OF THE REAR SPROCKET, ENGINE SPROCKET AND GUIDE CHAIN Check the condition of the swinging arm rubber and the chain guide as per the guide photos. Under normal circumstances, these two parts play a role in guiding the movement of the chain. If they are...
  • Page 46 GPX MOTO CHECK THE HANDLEBAR POSITION This setting is very personal to the operator. You should sit on the motorcycle and rest your hands on the handlebars naturally, and feel whether the position of the clutch grip and brake grip are comfortable or not.

  • Page 47: Maintenance Of The Brake System

    GPX MOTO MAINTENANCE OF THE BRAKE SYSTEM CHECK THE FREE-PLAY OF FRONT BRAKE LEVER Checking steps as below: 1. Rest your right hand on the right hand grip naturally 2. Use the index finger and middle finger of your right hand to check the free play.
  • Page 48 GPX MOTO CHECK THE DISC BRAKE Checking Steps are as follows: 1. Check whether there are cracks, dents and other damages on the surface 2. Measure the thickness of the rear disc and compare it with the limit thickness required.

  • Page 49: Check The Front Brake Pads

    GPX MOTO REFILL THE BRAKE FLUID LEVEL You should check/refuel the liquid level regularly. If the brake fluid is mixed with water, soil or other particles, the brake fluid should also be replaced. It is recommended to use DOT4 brake fluid.
  • Page 50 GPX MOTO In normal use,the free-play of the brake pedal is shown in the table below. Check the brake lever and pay attention to whether the stroke is correct. Model Free-Play 25～30mm www.GPXMOTO.com + www.GPXMOTOUK.com - 44 -...
  • Page 51 GPX MOTO CHECK THE REAR BRAKE DISK LIQUID LEVEL Check the Liquid level through the Observing Hole. The liquid level should higher than minimum level as required. You should refuel it if it is insufficient with DOT 4 brake fluid.
  • Page 52 GPX MOTO CHECK THE REAR BRAKE PADS After checking the thickness of the brake pads of the brake caliper, the thickness should not be less than 2 mm. If the thickness of the brake pads is lower than the minimum thickness, the entire set of brake pads should be replaced immediately.
  • Page 53 GPX MOTO TIRE INSPECTION AND MAINTENANCE REMOVING OR INSTALLING THE FRONT WHEEL Removing Steps are as follows:  Lift the motorcycle off the ground and Stabilize it by using a motorcycle stand.  Remove front disc brake cover.  Loosen the 2 front wheel axle pinch bolts on each side.

  • Page 54: Check Tire Pressure

    GPX MOTO CHECK TIRE PRESSURE Check the tire pressure by using a pressure gage. If it happens frequently with lower pressure problem, find out if there is a deflation or not and contact the GPX Dealer for help. Pressure advice...
  • Page 55 GPX MOTO www.GPXMOTO.com + www.GPXMOTOUK.com - 48 -...

  • Page 56: Electrical System

    GPX MOTO ELECTRICAL SYSTEM REMOVING OR INSTALLING THE BATTERY Removing Steps are as follows: 1. Removing the passenger seat 2. Disconnect cable from the battery 3. Remove the screw on battery holder 4. Pull the battery up and out. Installing Steps: The instalment should be carried out in the reverse order of removal.

  • Page 57: Main Cable

    GPX MOTO MAIN CABLE GPX VEHICLE WIRING DIAGRAM www.GPXMOTO.com + www.GPXMOTOUK.com - 50 -...

  • Page 58: Cooling System

    GPX MOTO COOLING SYSTEM COOLING SYSTEM PROFILE The excess heat from the engine is captured by the water and antifreeze (coolant)within the cooling system. This coolant is circulated around the engine and through 2 radiators by a coolant pump that is mounted within the engine .
  • Page 59 GPX MOTO CHECK COOLANT/ANTI FREEZE LEVEL  Stop and stand the motorcycle upright on a horizontal surface.  Release the radiator cap when the engine is cool only .  Sway the motorcycle from side to side and then check the antifreeze level, which should be between Min and Max and should be less that 1 inch from the very top of the neck .

  • Page 60: Filling The Cooling System

    GPX MOTO FILLING THE COOLING SYSTEM You should change the coolant regularly to increase service lift. Main work:  Drain out the coolant. → p.50  Replace the bolt after draining the coolant completely.  Fill in a little of coolant through radiator tank.

  • Page 61: Installing The Engine

    GPX MOTO INTRODUCING ABOUT THE ENGINE STRUCTURE 1. COOLING SYSTEM The GPX uses coolant to cool the engine. The coolant enters the engine from the water tank through the radiators, takes away the heat of the engine, flows back to the water tank, and then exchanges heat with the air.
  • Page 62 GPX MOTO THE ENGINE ADJUSTMENT IDLE SPEED ADJUSTMENT OF CARBURETOR The idle speed of the carburettor can be adjusted through the idle screw and air mixture screw. Proceed as follows: 1. Rotate the air screw clockwise until it reaches the top of its stroke, and then reverse one and a quarter of a turn;...
  • Page 63 GPX MOTO The carburettor will leave a portion of fuel after every ride. Therefore, the carburettor should be cleaned after each ride to avoid the generation of grease, stains and affect the use of the carburettor. The cleaning steps as follows: 1.
  • Page 64 GPX MOTO CHECK THE SHIFT LEVER POSITION The inspection steps are as follows: Shift 1. Raise the whole vehicle so that the centre plane of the tire is perpendicular to the ground 2. The line of sight is level with the tread surface, and observe the position of the shift head 3.

  • Page 65: Lubricant Selection

    GPX MOTO LUBRICANT SELECTION Lubricating oil is an important factor affecting the performance and life of the engine. It must be selected according to regulations. It is forbidden to replace it with ordinary engine oil, gear oil, vegetable oil, etc.
  • Page 66 GPX MOTO LUBRICANT REPLACEMENT When replacing the lubricating oil, it should be done before the engine is warm and has not yet cooled, so as to ensure that the lubricating oil in the crankcase can be discharged quickly and completely. When replacing, place an oil pan under the engine and unscrew the oil bolt A to release the lubricating oil.
  • Page 67 GPX MOTO www.GPXMOTO.com + www.GPXMOTOUK.com - 60 -...
  • Page 68 GPX MOTO REMOVAL OF THE COOLING PUMP The removal steps of the cooling pump are as follows: 1. Place a container under the engine, unscrew the engine drain bolt A, and release the coolant in the engine. 2. Unscrew the fastening bolts B, C, D of the water pump cover.
  • Page 69 GPX MOTO 4. Install the cooling pump cover NOTE: Sealant needs to be applied to both sides of the paper pad of the cooling pump cover. NOTE: The tightening torque of the cooling pump cover bolts is 10～15N.m. ENGINE CYLINDER BLOCK AND PISTON...

  • Page 70: Removal Of Cylinder

    GPX MOTO REMOVAL OF CYLINDER The cylinder block removal steps are as follows: 1. Remove the cylinder head. 2. Remove the cylinder head gasket. 3. Remove the cylinder block. NOTE: When removing the cylinder, the cylinder block positioning pin cannot fall into the crankcase.

  • Page 71: Piston And Piston Ring Inspection

    GPX MOTO PISTON AND PISTON RING INSPECTION Use thickness gauge A to measure the gap between the piston ring and the groove of the piston ring. Measurement standard value: The first ring: 0.02～0.04 The second ring: 0.02～0.06 Remove the piston ring.
  • Page 72 GPX MOTO CHECK CLEARANCE BETWEEN CYLINDER PISTON Measure the outer diameter 10mm above the bottom end of the piston skirt. Standard value: 77.950～77.97 Calculate the gap between the cylinder and the piston. MEASURE THE DIAMETER OF PISTON PIN AND PIN HOLE Measure the diameter of the piston pin hole: Standard value: 17.002～17.008...

  • Page 73: Installation Of Piston

    GPX MOTO Precautions when installing the piston ring: The opening of one ring faces the pin position of the other ring; The opening of the second ring faces the pin position of the second ring. INSTALLATION OF PISTON Install the piston, piston pin and new piston retaining ring.

  • Page 74: Installation Of Cylinder

    GPX MOTO INSTALLATION CYLINDER The installation steps of the cylinder block are as follows: 1. Install the new paper pad and positioning pin. 2. Coat the cylinder and piston ring with a layer of oil. 3. Install the cylinder. The tightening torque of cylinder block nut: 24±2N.m NOTE: When installing, avoid damaging the piston.

  • Page 75: Clutch Inspection

    GPX MOTO REMOVAL THE CLUTCH The clutch disassembly steps are as follows: 1. Remove the locking bolt of the clutch friction plate. 2. Remove the clutch friction plate pressure plate and pull rod. 3. Loosen the clutch lock nut. 4. Remove the clutch assembly.
  • Page 76 GPX MOTO Use a thickness gauge to check the flatness of the driven friction plate Standard value: ≤0.1 Repair limit value: 0.2 Vernier caliper to check the free height of the clutch spring Standard value: 35.5 Repair limit: 34 INSTALLATION OF CLUTCH The clutch installation steps are as follows: 1.
  • Page 77 GPX MOTO 8. Installation centre set combination 9. Install the clutch lock nut gasket (concave face down) 10. Install the clutch lock nut (chamfered face down) The installation torque is: (70～80) N·m 11. Install the clutch cover 12. Install bearings, flat washers and push rods 13.
  • Page 78 GPX MOTO REMOVAL OR INSTALLATION OF THE SHIFT MECHANISM IN THE ENGINE The disassembly and assembly steps of the shift mechanism are as follows: 1. Remove the clutch assembly. 2. Pull out the shift arm. Check whether the shift arm has any deformation and wear that affect the use.
  • Page 79 GPX MOTO MAGNETO AND ELECTRIC STARTING PARTS OF ENGINE REMOVAL OR INSTALLATION OF STARTER MOTOR The removal steps of the starter motor are as follows: 1. Remove the motor mounting bolt A 2. Remove the starting motor Installation is carried out in the reverse order of removal.
  • Page 80 GPX MOTO REMOVAL OR INSTALLATION OF MAGNETO STATOR The removal steps of the magneto stator are as follows: 1. Remove the mounting bolt B of the stator crimping plate. 2. Remove the stator crimping plate. 3. Remove the trigger component D.
  • Page 81 GPX MOTO 8. Check whether the double gear and the driven gear are worn or damaged, if any, replace it. Installation is carried out in the reverse order of removal. Torque of tightening bolts of electric start driven wheel pressing plate: 10～14N·m...

  • Page 82: Crankshaft Inspection

    GPX MOTO REMOVAL OF CRANKCASE The removal steps of the crankcase are as follows: 1. Loosen the connecting bolts of the crankcase. 2. Remove the right crankcase. 3. Remove the positioning pin of the box. Remove the sealant on the end face, do not damage the...
  • Page 83 GPX MOTO Check the crankshaft bearing for wear or damage, if any, replace it. TRANSMISSION MECHANISM INSPECTION Check the thickness of the shift fork plate A. Standard value: 4.93～5.0 Repair limit value: 4.83 Check the fork pin diameter B Standard value: 5.93～6.0 Check whether the rotation and axial sliding of the gears of the main and counter shafts are flexible.
  • Page 84 GPX MOTO INSTALLATION OF TRANSMISSION MECHANISM The installation steps of the transmission mechanism are as follows: 1. Heat the crankshaft bearing hole of the left crankcase to 130～150℃. 2. Gently press the crankshaft into the crankcase. 3. Turn the crankshaft to see if it turns flexibly.
  • Page 85 GPX MOTO INSTALLATION OF REMAINING PARTS The installation steps are as follows: 1. Install O-ring B and counter shaft sleeve A on the counter shaft. 2. Apply a proper amount of thread fastening glue to the thread of the counter shaft.

  • Page 86: Troubleshooting

    GPX MOTO ENGINE TIGHTENING TORQUE TABLE The engine tightening torque table is as follows: Applicable parts TORQUE VALUE 28-32N.m Cylinder head nut M8 Cylinder head boltM6 10-15N.m Timing sprocket 10-15N.m Clutch tightening nut 40-50N.m Magneto rotor bolt 65-71N.m Valve cover 12-18N.m...
  • Page 87 GPX MOTO or short-circuited The ignition switch is faulty The starting mechanism is slipping, Low Pressure and the engine cannot be turned Valve clearance is too small Valve opening blocked Cylinder or piston ring wear Test cylinder pressure Cylinder head gasket...
  • Page 88 GPX MOTO of the fine adjustment screw of the Correct carburettor plunger Deterioration of Air leak Carburettor seal ring Check whether the carburettor gasket Loose carburettor is leaking Airtight Damaged carburettor gasket The spark plug is faulty or carbon deposits...
  • Page 89 GPX MOTO Valve clearance is too Check whether there is Abnormal noise in the large abnormal noise in the valve valve Valve wear Piston and cylinder wear The small end holes Check whether there is of the piston pin and...
  • Page 90 GPX MOTO high, the viscosity is 40, 50 or Viscosity Compounding agent without ZDDP [2] with ZDDP Viscosity index improver Low molecular weight PIB [3] High molecular weight PIB Ash [4] High [1] Flash point: Flash is kind of fleeting flashing phenomenon. It is occurred when flammable gas, which is mixed gas of vapour produced on the surface and air, encounters a fire.

  • Page 91: Motorcycle Cleaning

    GPX MOTO MOTORCYCLE CLEANING The cleaning of the vehicle is also an important part of the daily use and maintenance of the motorcycle. Frequent cleaning of your motorcycle can keep your car in a good state of motion and prolong its service life. You can clean your motorcycle through the following steps: 1.

  • Page 92: Maintenance Points

    GPX MOTO NOTE: When applying anti-rust oil, please do not splash the oil on the brake and rubber parts, otherwise the rubber may be aged. PREPARING FOR USE AFTER LONG STORAGE After the motorcycle has been stored for a long time, please follow the steps below when it is put into use: 1.
  • Page 93 GPX MOTO check the battery The motorcycle has been stored Drain the old fuel and add new for a long time and the fuel has fuel deteriorated Clean or dry the spark plug, if Dirt or wet spark plug necessary, replace the spark plug...
  • Page 94 GPX MOTO Check and correct the exhaust Open exhaust valve valve Close the choke valve, clean the The engine can be started, Incorrect air supply fuel tank vent pipe, and adjust the will stop air filter duct immediately Lack of fuel...
  • Page 95 GPX MOTO gasket is ageing, replace the gasket White smoke from Change fuel The fuel contains water exhaust pipe Air filter is clogged Remove and clean the air filter Black smoke from exhaust The combustible mixture is too Adjust the carburettor valve...
  • Page 96 GPX MOTO Note: It is required to add the same kind of oil Change to fork oil with suitable Fork oil viscosity is too low viscosity Check whether the tires are Tire pressure is too low leaking, if the tires are complete,...
  • Page 97 GPX MOTO Disc brake disc wear Replace the disc brake Insufficient brake fluid Replenish brake fluid Deteriorating brake fluid Replace brake fluid Piston damaged Contact GPX Service Centre Brake failure Check the brake pads, if the thickness is less than the minimum...
  • Page 98 GPX MOTO Rear sprocket mounting 27～35 M8×31 10.9 level screws 452～550 Rear axle nut M22×1.5 Rear brake disc guard 7～11 M6×12 mounting bolt Brake pedal head mounting 4～7 M5×10 full thread screw 20～32 Brake limit bolt M8×20 full thread Rear brake pump mounting 7～11...

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