Owners Manual
Page 6
...17 PRE-OPERATION CHECKS ...6-1 Fuel ...6-1 Engine oil...6-2 Coolant ...6-2 Throttle lever ...6-3 Recoil starter ...6-3 Throttle override system (T.O.R.S.) ...6-3 Brake ...6-4 Brake fluid leakage ...6-5 V-belt ...6-5 Drive guard ...6-5 Drive track ...6-6 51-mm (2.0-in) high-profile pattern drive track...6-6 Slide runners ...6-6 Skis and ski runners ...6-7 Steering system...6-7 Lights ...6-7 Battery ...6-8 Air filter ...6-8 Fittings and fasteners ...6-9 Tool kit and recommended equipment...6-9 OPERATION ...7-1 Starting the engine ...7-1 Emergency engine starting...7-2 Break-in ...7-4 Riding your...
...17 PRE-OPERATION CHECKS ...6-1 Fuel ...6-1 Engine oil...6-2 Coolant ...6-2 Throttle lever ...6-3 Recoil starter ...6-3 Throttle override system (T.O.R.S.) ...6-3 Brake ...6-4 Brake fluid leakage ...6-5 V-belt ...6-5 Drive guard ...6-5 Drive track ...6-6 51-mm (2.0-in) high-profile pattern drive track...6-6 Slide runners ...6-6 Skis and ski runners ...6-7 Steering system...6-7 Lights ...6-7 Battery ...6-8 Air filter ...6-8 Fittings and fasteners ...6-9 Tool kit and recommended equipment...6-9 OPERATION ...7-1 Starting the engine ...7-1 Emergency engine starting...7-2 Break-in ...7-4 Riding your...
Owners Manual
Page 7
... ...8-10 Cooling system ...8-11 V-belt replacement ...8-13 Checking the oil level of the drive chain housing ...8-15 Checking the brake pads...8-17 Checking the parking brake pads...8-17 Checking the brake fluid level...8-18 Brake fluid replacement...8-18 Suspension...8-18 Drive track adjustment...8-26 Ski alignment ...8-28 Lubrication ...8-29 Headlight bulb replacement...8-30 Headlight beam adjustment...8-30 Battery ...8-31 Fuse replacement...8-32 TROUBLESHOOTING ...9-1 STORAGE ...10-1 SPECIFICATIONS ...11-1 Dimensions...11-1 Engine ...11-1 Chassis...11-2 Electric...11-3 WIRING DIAGRAM ...12...
... ...8-10 Cooling system ...8-11 V-belt replacement ...8-13 Checking the oil level of the drive chain housing ...8-15 Checking the brake pads...8-17 Checking the parking brake pads...8-17 Checking the brake fluid level...8-18 Brake fluid replacement...8-18 Suspension...8-18 Drive track adjustment...8-26 Ski alignment ...8-28 Lubrication ...8-29 Headlight bulb replacement...8-30 Headlight beam adjustment...8-30 Battery ...8-31 Fuse replacement...8-32 TROUBLESHOOTING ...9-1 STORAGE ...10-1 SPECIFICATIONS ...11-1 Dimensions...11-1 Engine ...11-1 Chassis...11-2 Electric...11-3 WIRING DIAGRAM ...12...
Owners Manual
Page 14
... alcohol or drugs. 5. Consult a Yamaha dealer about any of control. 4. Apply the parking brake before starting the engine. Such use the following . Carrying a passenger can cause loss of the following for proper operation every time before starting the engine. Severe injury or death may overheat the brake disc and reduce braking ability. 3-1 SAFETY INFORMATION When you ride your safety. This may result if you...
... alcohol or drugs. 5. Consult a Yamaha dealer about any of control. 4. Apply the parking brake before starting the engine. Such use the following . Carrying a passenger can cause loss of the following for proper operation every time before starting the engine. Severe injury or death may overheat the brake disc and reduce braking ability. 3-1 SAFETY INFORMATION When you ride your safety. This may result if you...
Owners Manual
Page 15
... that the fuel tank cap is closed securely after running. Operation 1. Hitting a rock or stump, or running or hot. Handle fuel with extreme care. Wear protective clothing. Never remove the fuel cap indoors. A...controls. Do not run the engine indoors, except when starting , inspecting, or adjusting the snowmobile. exhaust fumes are dangerous. 2. There may be dangerous to cool for operation of gasoline vapor, or get some gasoline into wires could cause an accident and injury. 3-2 Stay on your skin or clothing, immediately wash your skin with soap and water, and change...
... that the fuel tank cap is closed securely after running. Operation 1. Hitting a rock or stump, or running or hot. Handle fuel with extreme care. Wear protective clothing. Never remove the fuel cap indoors. A...controls. Do not run the engine indoors, except when starting , inspecting, or adjusting the snowmobile. exhaust fumes are dangerous. 2. There may be dangerous to cool for operation of gasoline vapor, or get some gasoline into wires could cause an accident and injury. 3-2 Stay on your skin or clothing, immediately wash your skin with soap and water, and change...
Owners Manual
Page 16
... the fuel tank inside a building where ignition sources are present such as hot water and space heaters, an open flame, sparks, clothes dryers, and the like. Maintenance and storage 1. Many surfaces such as necessary. 3-3 Operation under such conditions will damage or result in an enclosed space. 4. Modifications made to the snowmobile not approved by Yamaha, or the removal of control...
... the fuel tank inside a building where ignition sources are present such as hot water and space heaters, an open flame, sparks, clothes dryers, and the like. Maintenance and storage 1. Many surfaces such as necessary. 3-3 Operation under such conditions will damage or result in an enclosed space. 4. Modifications made to the snowmobile not approved by Yamaha, or the removal of control...
Owners Manual
Page 18
...[ \ ] _ a Storage compartment Tail/brake light Snow flap Side mirror (VT70) Brake lever Parking brake lever Grip warmer adjustment switch Headlight beam switch Strap (SXV70M) Engine stop switch Thumb warmer adjustment switch Throttle lever Shift lever (SXV70ER/VT70) Starter handle Shroud latch Main switch Starter lever Tachometer "D.C.S." (Detonation Control System) indicator light High beam indicator light Warning light Self-diagnosis warning indicator Coolant temperature warning indicator Fuel level warning indicator Oil level warning indicator Speedometer Grip warmer indicator Select/reset...
...[ \ ] _ a Storage compartment Tail/brake light Snow flap Side mirror (VT70) Brake lever Parking brake lever Grip warmer adjustment switch Headlight beam switch Strap (SXV70M) Engine stop switch Thumb warmer adjustment switch Throttle lever Shift lever (SXV70ER/VT70) Starter handle Shroud latch Main switch Starter lever Tachometer "D.C.S." (Detonation Control System) indicator light High beam indicator light Warning light Self-diagnosis warning indicator Coolant temperature warning indicator Fuel level warning indicator Oil level warning indicator Speedometer Grip warmer indicator Select/reset...
Owners Manual
Page 19
CONTROL FUNCTIONS ESU00256 Main switch The main switch controls the following items. 1 "OFF" The ignition circuit is switched on. A 2 "ON" The ignition circuit is switched off. CAUTION: @ Release the switch immediately after the engine starts. @ B For SXV70ER/VT70 3 "START" The starting circuit is switched on after the engine starts. @ È SXV70M/SXV70S É SXV70ER/VT70 5-1 The key can be removed only in this position. NOTE: @ The headlight, meter lights, and taillight will come on . The engine can be started. The starter motor starts. ESU00013 5-
CONTROL FUNCTIONS ESU00256 Main switch The main switch controls the following items. 1 "OFF" The ignition circuit is switched on. A 2 "ON" The ignition circuit is switched off. CAUTION: @ Release the switch immediately after the engine starts. @ B For SXV70ER/VT70 3 "START" The starting circuit is switched on after the engine starts. @ È SXV70M/SXV70S É SXV70ER/VT70 5-1 The key can be removed only in this position. NOTE: @ The headlight, meter lights, and taillight will come on . The engine can be started. The starter motor starts. ESU00013 5-
Owners Manual
Page 20
... a cold engine. 1 2 3 4 @ Starter lever (choke) When starting the engine. @ ESU00023 Throttle override system (T.O.R.S.) If the carburetor or throttle cable should malfunction during operation, the T.O.R.S. WARNING @ Check the throttle, brake, and steering for proper operation. @ ESU00022 Throttle lever Once the engine is running cleanly, squeezing a the throttle lever 1 will increase the engine speed and cause engagement of the snowmobile by varying the throttle position. is designed to interrupt the ignition...
... a cold engine. 1 2 3 4 @ Starter lever (choke) When starting the engine. @ ESU00023 Throttle override system (T.O.R.S.) If the carburetor or throttle cable should malfunction during operation, the T.O.R.S. WARNING @ Check the throttle, brake, and steering for proper operation. @ ESU00022 Throttle lever Once the engine is running cleanly, squeezing a the throttle lever 1 will increase the engine speed and cause engagement of the snowmobile by varying the throttle position. is designed to interrupt the ignition...
Owners Manual
Page 21
... the malfunction has been corrected and that the engine can be operated without a problem before restarting the engine. will operate CA-01E Mode A Idle or Switch starting Throttle switch Off Carburetor switch On B Engine È É Ê 1 2 3 4 a b Idle or starting Run Trouble Carburetor switch Throttle switch Throttle cable Throttle valve On Off Run C 5-3 Be sure to use the specified spark plug and spark plug cap. will not work properly. B Run On Off Run C Trouble Off Off T.O.R.S. WARNING @ G G A @ If the T.O.R.S.
... the malfunction has been corrected and that the engine can be operated without a problem before restarting the engine. will operate CA-01E Mode A Idle or Switch starting Throttle switch Off Carburetor switch On B Engine È É Ê 1 2 3 4 a b Idle or starting Run Trouble Carburetor switch Throttle switch Throttle cable Throttle valve On Off Run C 5-3 Be sure to use the specified spark plug and spark plug cap. will not work properly. B Run On Off Run C Trouble Off Off T.O.R.S. WARNING @ G G A @ If the T.O.R.S.
Owners Manual
Page 22
... (which show self-diagnosis, coolant temperature, fuel level, and oil level warnings) G a "D.C.S." (Detonation Control System) indicator light (which shows occurrences of abnormal combustion) G a fuel meter (which shows the fuel remaining in the fuel tank) G a grip/thumb warmer heat level indicator (which shows the heat level of the meter 3 turn on and off if there are no problems. The grip warmer heat level is initially displayed...
... (which show self-diagnosis, coolant temperature, fuel level, and oil level warnings) G a "D.C.S." (Detonation Control System) indicator light (which shows occurrences of abnormal combustion) G a fuel meter (which shows the fuel remaining in the fuel tank) G a grip/thumb warmer heat level indicator (which shows the heat level of the meter 3 turn on and off if there are no problems. The grip warmer heat level is initially displayed...
Owners Manual
Page 49
... are the two basic factors of its controls. @ Braking When slowing down or stopping, release the throttle and apply the brake gently-not suddenly. Once it is supplied with the snowmobile's handling and performance characteristics. Improper use of the brake can be rewarded with the operation of an accident. @ 7-5 Also, read this Owner's Manual completely and understand the operation of...
... are the two basic factors of its controls. @ Braking When slowing down or stopping, release the throttle and apply the brake gently-not suddenly. Once it is supplied with the snowmobile's handling and performance characteristics. Improper use of the brake can be rewarded with the operation of an accident. @ 7-5 Also, read this Owner's Manual completely and understand the operation of...
Owners Manual
Page 50
... engine and set the parking brake. Do not get on the running board to prevent track slippage. This procedure should be practiced at higher speeds or in a large flat area with the operation of the turn and lean your snowmobile. On climbs straight up a hill, do so, put your weight on gentle slopes. Try more as abrupt throttle changes...
... engine and set the parking brake. Do not get on the running board to prevent track slippage. This procedure should be practiced at higher speeds or in a large flat area with the operation of the turn and lean your snowmobile. On climbs straight up a hill, do so, put your weight on gentle slopes. Try more as abrupt throttle changes...
Owners Manual
Page 51
Also apply the brake frequently, with the knee of control. @ If you have to operate on the running board. Snow and ice are no obstacles in your body weight as needed. Riding downhill When riding downhill, keep the clutch engaged while descending the hill...slope WARNING @ WARNING @ When you are an ever-present danger. @ Traversing slopes is not recommended for turning, stopping, or starting is to a minimum. A recommended riding position is much less than that your snowmobile is important to apply just enough throttle to keep speed to kneel with light pressure....
Also apply the brake frequently, with the knee of control. @ If you have to operate on the running board. Snow and ice are no obstacles in your body weight as needed. Riding downhill When riding downhill, keep the clutch engaged while descending the hill...slope WARNING @ WARNING @ When you are an ever-present danger. @ Traversing slopes is not recommended for turning, stopping, or starting is to a minimum. A recommended riding position is much less than that your snowmobile is important to apply just enough throttle to keep speed to kneel with light pressure....
Owners Manual
Page 58
...) G Page Spark plugs Check condition. Check coolant level. G G 8-4-8-5 6-2 Engine oil Fuel ∗ Fuel filter ∗ Fuel line G 6-1-6-2 G G ∗ Oil line G 6-2, 8-11-8-12 G G Whenever operating condition (elevation/temperature) is recommended that these items be serviced by a Yamaha dealer. 8-1 Check operation. Check operation. ∗ Repair if necessary. Check oil level. Check oil hose for cracks or damage. Check operation and rope damage. ∗ Replace if necessary. Check condition. Recoil starter Engine stop switch Throttle override system...
...) G Page Spark plugs Check condition. Check coolant level. G G 8-4-8-5 6-2 Engine oil Fuel ∗ Fuel filter ∗ Fuel line G 6-1-6-2 G G ∗ Oil line G 6-2, 8-11-8-12 G G Whenever operating condition (elevation/temperature) is recommended that these items be serviced by a Yamaha dealer. 8-1 Check operation. Check operation. ∗ Repair if necessary. Check oil level. Check oil hose for cracks or damage. Check operation and rope damage. ∗ Replace if necessary. Check condition. Recoil starter Engine stop switch Throttle override system...
Owners Manual
Page 59
...; Exhaust system ∗ Decarbonization Drive guard V-belt Drive track and idler wheels Slide runners Check for wear and damage. ∗ Adjust/replace if necessary. More frequently if necessary. G G G G G G G G G G 5-15, 6-5 6-5, 8-13-8-15 6-6, 8-26-8-28 6-6 G 5-12-5-13, 6-4-6-5 8-17-8-18 G Brake and parking brake See NOTE on page 8-3. Check operation. Check for slight free play and/or replace pads if necessary. ∗ Replace brake fluid. Tighten or replace gasket if...
...; Exhaust system ∗ Decarbonization Drive guard V-belt Drive track and idler wheels Slide runners Check for wear and damage. ∗ Adjust/replace if necessary. More frequently if necessary. G G G G G G G G G G 5-15, 6-5 6-5, 8-13-8-15 6-6, 8-26-8-28 6-6 G 5-12-5-13, 6-4-6-5 8-17-8-18 G Brake and parking brake See NOTE on page 8-3. Check operation. Check for slight free play and/or replace pads if necessary. ∗ Replace brake fluid. Tighten or replace gasket if...
Owners Manual
Page 62
.... Turn the throttle stop screw 1 in combustion chamber hot spots and thread damage. Always use a spark plug with a wire thickness gauge and adjust to the end of the threaded portion. Make sure that the carburetor is too short, spark plug fouling and poor performance may result. NOTE: @ Refer to adjust the engine idle speed. Also, if the reach is too long, overheating and engine...
.... Turn the throttle stop screw 1 in combustion chamber hot spots and thread damage. Always use a spark plug with a wire thickness gauge and adjust to the end of the threaded portion. Make sure that the carburetor is too short, spark plug fouling and poor performance may result. NOTE: @ Refer to adjust the engine idle speed. Also, if the reach is too long, overheating and engine...
Owners Manual
Page 66
Large No. 1. Changing these settings without sufficient technical knowledge may result in the holder and throttle operates smoothly after assembling the carburetor. @ ESU00156 Yamaha Power Valve System (Y.P.V.S.) The Y.P .V.S. Standard main jet: # 156.3 CD-04E Main jet 1 Mixture Lean Rich Condition Warm weather High altitude Cold weather Low altitude Small No. WARNING @ Make sure that the throttle outer cable is a vital part...
Large No. 1. Changing these settings without sufficient technical knowledge may result in the holder and throttle operates smoothly after assembling the carburetor. @ ESU00156 Yamaha Power Valve System (Y.P.V.S.) The Y.P .V.S. Standard main jet: # 156.3 CD-04E Main jet 1 Mixture Lean Rich Condition Warm weather High altitude Cold weather Low altitude Small No. WARNING @ Make sure that the throttle outer cable is a vital part...
Owners Manual
Page 90
... cylinder ...Ask a Yamaha dealer to combustion chamber G No fuel in tank ...Supply fuel. B. The T.O.R.S. Fuel system No fuel supplied to inspect. Electrical system Poor or no spark G Spark plugs are dirty with the recoil starter 1. Engine does not turn over but does not start 1. G Worn or damaged gasket ...Replace gasket. G Faulty ignition system ...Ask a Yamaha dealer to inspect the electrical circuits as soon as possible. 1 Relay with throttle open or wipe the spark plugs...
... cylinder ...Ask a Yamaha dealer to combustion chamber G No fuel in tank ...Supply fuel. B. The T.O.R.S. Fuel system No fuel supplied to inspect. Electrical system Poor or no spark G Spark plugs are dirty with the recoil starter 1. Engine does not turn over but does not start 1. G Worn or damaged gasket ...Replace gasket. G Faulty ignition system ...Ask a Yamaha dealer to inspect the electrical circuits as soon as possible. 1 Relay with throttle open or wipe the spark plugs...
Owners Manual
Page 91
... V-belt clutch offset ...Ask a Yamaha dealer to inspect. 2. Worn or damaged V-belt ...Replace the V-belt or ask a Yamaha dealer to inspect. 4. Worn or sticking primary sheave assembly ...Ask a Yamaha dealer to inspect. 2. Faulty wire connections ...Check connections or ask a Yamaha dealer to inspect. 3. Discharged battery...Check battery fluid and charge battery. 3. Improper fuel flow ...See A.1. Engine constantly backfires or misfires 1. Faulty spark plugs ...Replace the spark plugs. 2. above . above . 4. Air in the drive track...
... V-belt clutch offset ...Ask a Yamaha dealer to inspect. 2. Worn or damaged V-belt ...Replace the V-belt or ask a Yamaha dealer to inspect. 4. Worn or sticking primary sheave assembly ...Ask a Yamaha dealer to inspect. 2. Faulty wire connections ...Check connections or ask a Yamaha dealer to inspect. 3. Discharged battery...Check battery fluid and charge battery. 3. Improper fuel flow ...See A.1. Engine constantly backfires or misfires 1. Faulty spark plugs ...Replace the spark plugs. 2. above . above . 4. Air in the drive track...
Owners Manual
Page 99
...(SXV70ER/VT70) Battery (SXV70ER/VT70) Starter motor (SXV70ER/VT70) Main switch Engine stop switch Throttle switch Carburetor switch Grip warmer Thumb warmer CDI unit Servo motor Throttle position sensor Grip warmer adjustment switch Thumb warmer adjustment switch Engine ground Ignition coil Spark plug Frame ground Coolant temperature sensor Passenger grip warmer switch (VT70) Resistor (VT70) Passenger grip warmer (left) (VT70) Passenger grip warmer (right) (VT70) Passenger grip warmer relay (VT70) DC back buzzer (SXV70ER/VT70) Gear position switch (SXV70ER/VT70) Knock sensor Brake light switch
...(SXV70ER/VT70) Battery (SXV70ER/VT70) Starter motor (SXV70ER/VT70) Main switch Engine stop switch Throttle switch Carburetor switch Grip warmer Thumb warmer CDI unit Servo motor Throttle position sensor Grip warmer adjustment switch Thumb warmer adjustment switch Engine ground Ignition coil Spark plug Frame ground Coolant temperature sensor Passenger grip warmer switch (VT70) Resistor (VT70) Passenger grip warmer (left) (VT70) Passenger grip warmer (right) (VT70) Passenger grip warmer relay (VT70) DC back buzzer (SXV70ER/VT70) Gear position switch (SXV70ER/VT70) Knock sensor Brake light switch