Yamaha YFM90RA Model Vehicle User Manual


 
8 - 3
TRBL
SHTG
FAULTY GEAR SHIFTING/CLUTCH SLIPPING/
DRAGGING/OVERHEATING
EAS00853
FAULTY CLUTCH
ENGINE OPERATES BUT VEHICLE WILL
NOT MOVE
V-belt
Bent, damaged or worn V-belt
Slipping V-belt
Primary pulley cam and primary pulley slider
Damaged or worn primary pulley cam
Damaged or worn primary pulley slider
Clutch spring(s)
Damaged clutch spring
Transmission gears
Damaged transmission gear
CLUTCH SLIPPING
Clutch shoe springs
Damaged, loose or worn clutch shoe
spring
Damaged or worn clutch shoe
Clutch shoes
Seized primary sliding sheave
EBS00546
OVERHEATING
OVERHEATING
Ignition system
Improper spark plug gap
Improper spark plug heat range
Faulty C.D.I. unit
Fuel system
Improper carburetor main jet (improper set-
ting)
Improper fuel level
Clogged air filter element
Compression system
Heavy carbon build-up
Engine oil
Improper oil level
Improper oil viscosity
Inferior oil quality
Brake
Brake drag
Primary sliding sheave
Oil or grease on the V-belt
Primary pulley weight(s)
Faulty operation
Worn primary pulley weight
Primary fixed sheave
V-belt
Worn pin groove
Worn pin
Primary sliding sheave
Faulty operation
Oil or grease on the V-belt
V-belt slips
Clutch shoes
Bent, damaged or worn clutch shoe
Worn primary sliding sheave
Worn primary fixed sheave
Primary sliding sheave
Seized primary sliding sheave
Secondary fixed sheave
Worn secondary sliding sheave
Secondary sliding sheave
POOR STARTING PERFORMANCE
POOR SPEED PERFORMANCE
V-belt