Faulty Clutch; Overheating; Overcooling - Yamaha Grizzly550 User Manual

Transmission
• Worn gear dog
EAS28580

FAULTY CLUTCH

Engine operates but vehicle will not move
1. V-belt
• Damaged or worn V-belt
• Slipping V-belt
2. Primary pulley cam and primary pulley slider
• Damaged or worn primary pulley cam
• Damaged or worn primary pulley slider
3. Clutch spring(s)
• Damaged clutch spring
4. Transmission gear(s)
• Damaged transmission gear
Clutch slips
1. Clutch spring
• Damaged, loose or worn clutch spring
2. Clutch shoe
• Damaged or worn clutch shoe
3. Primary sliding sheave
• Seized primary sliding sheave
Poor starting performance
1. V-belt
• V-belt slips
• Oil or grease on the V-belt
2. Primary sliding sheave
• Faulty operation
• Worn pin groove
• Worn pin
3. Clutch shoe
• Bent, damaged or worn clutch shoe
Poor speed performance
1. V-belt
• Oil or grease on the V-belt
2. Primary pulley weight(s)
• Faulty operation
• Worn primary pulley weight
3. Primary fixed sheave
• Worn primary fixed sheave
4. Primary sliding sheave
• Worn primary sliding sheave
5. Secondary fixed sheave
• Worn secondary fixed sheave
6. Secondary sliding sheave
• Worn secondary sliding sheave
TROUBLESHOOTING
EAS28600

OVERHEATING

Engine
1. Clogged coolant passages
2. Cylinder head and piston
• Heavy carbon buildup
3. Engine oil
• Incorrect oil level
• Incorrect oil viscosity
• Inferior oil quality
Cooling system
1. Coolant
• Low coolant level
2. Radiator
• Damaged or leaking radiator
• Faulty radiator cap
• Bent or damaged radiator fin
3. Water pump
• Damaged or faulty water pump
4. Thermostat
• Thermostat stays closed
5. Hose(s) and pipe(s)
• Damaged hose
• Improperly connected hose
• Damaged pipe
• Improperly connected pipe
Fuel system
1. Throttle body
• Damaged or loose throttle body joint
2. Air filter
• Clogged air filter element
Chassis
1. Brake(s)
• Dragging brake
Electrical system
1. Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
2. Ignition system
• Faulty ECU
EAS28610

OVERCOOLING

Cooling system
1. Thermostat
• Thermostat stays open
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