Overheat; Poor Speed - Yamaha YW50AP Service Manual

OVERHEAT

OVER HEAT
Ignition system
Fuel system
Compression system
Muffler, Exhaust pipe
Oil pimp
Brake
Cooling system

POOR SPEED

POOR SPEED
Ignition system
Fuel system
Compression system
Muffler, Exhaust pipe
Clutch
Brake
OVER HEAT / POOR SPEED
PROBABLE CAUSE
8 Improper plug gap
8 Improper spark plug heat range
8 Faulty C.D.I. unit
8 Improper carburetor setting
8 Clogged air filter
8 Carbon accumulation of cylinder head
8 Clogged
8 Faulty oil pump
8 Faulty oil quality
8 Drag
8 Fan damaged
PROBABLE CAUSE
8 Faulty spark plug
8 Improper spark plug heat range
8 Faulty C.D.I. unit
8 Faulty source coil
8 Clogged fuel tank cap
8 Clogged air filter
8 Clogged carburetor
8 Worn cylinder
8 Worn, fatigued or broken piston ring
8 Broken cylinder head gasket
8 Broken cylinder gasket
8 Carbon accumulation of cylinder head
8 Clogged
8 Refer to "FAULTY AUTOMATIC"
8 Drag
8-5
TRBL
SHTG