Yamaha YW125Y_ Utility Trailer User Manual


 
8-3
TRBL
SHTG
FAULTY CLUTCH/OVERHEATING
EAS00853
FAULTY CLUTCH
ENGINE OPERATES BUT SCOOTER WILL
NOT MOVE
V-belt
8Bent, damaged or worn V-belt
8Slipping V-belt
Primary pulley cam and primary pulley slider
8Damaged or worn primary pulley cam
8Damaged or worn primary pulley slider
Clutch spring(s)
8Damaged clutch spring
Transmission gears
8Damaged transmission gear
CLUTCH SLIPS
Clutch shoe springs
8Damaged, loose or worn clutch shoe
spring
Clutch shoes
8Damaged or worn clutch shoe
Primary sliding sheave
8Seized primary sliding sheave
POOR STARTING PERFORMANCE
V-belt
8V-belt slips
8Oil or grease on the V-belt
Primary sliding sheave
8Faulty operation
8Worn pin groove
8Worn pin
Clutch shoes
8Bent, damaged or worn clutch shoe
POOR SPEED PERFORMANCE
V-belt
8Worn V-belt
8Oil or grease on the V-belt
Primary pulley weight(s)
8Faulty operation
8Worn primary pulley weight
Primary fixed sheave
8Worn primary fixed sheave
Primary sliding sheave
8Worn primary sliding sheave
Secondary fixed sheave
8Worn secondary fixed sheave
Secondary sliding sheave
8Worn secondary sliding sheave
EAS00855
OVERHEATING
ENGINE
Clogged coolant passages
8Heavy carbon buildup in cylinder head
and piston
Engine oil
8Incorrect oil level
8Incorrect oil viscosity
8Inferior oil quality
FUEL SYSTEM
Throttle body
8Faulty throttle body
8Damaged or loose throttle body joint
Air filter
8Clogged air filter element
CHASSIS
Brake(s)
8Dragging brake
ELECTRICAL SYSTEMS
Spark plug
8Incorrect spark plug gap
8Incorrect spark plug heat range
Ignition system
8Faulty ECU
8Faulty engine temperature sensor
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