Poor Performance In Middle And High Speed; Failure To Gear; Shift Pedal Does Not Move; Skip Gears - Yamaha FZ-16 Service Manual

Electrical System
1. Battery
•
Discharged battery
•
Defective battery
2. Plug
•
Electrode gap of spark plug incorrect
•
Heat range spark plug incorrect
•
Spark plug faulty
•
Worn or damaged electrode
•
Worn or damaged insulation
•
Faulty spark plug cap
3. Ignition coil
•
Primary or secondary coils fractured or
short circuit
•
Faulty spark plug wire
•
Ignition coil cracked or fractured
4. Ignition system
•
Defective CDI
•
Crankshaft position sensor faulty
•
Rotor magnet or pin broken
POOR PERFORMANCE IN MIDDLE AND HIGH
SPEED
Refer to "STARTING FAILURES"
on page 8-1.
.
Engine
1. Air filter
•
Air filter element clogged
Fuel System
1. Carburetor
•
Defective carburetor

FAILURE TO GEAR

Changing gear is difficult
See "Drag clutch."

SHIFT PEDAL DOES NOT MOVE

Axis changes
•
Bent shift shaft
Drum changes and forks
•
Foreign body in a drum groove changes
•
Shift fork stuck
•
Guide bar bent shift fork
Transmission
•
Transmission gear stuck
•
Foreign objects between the wheels of
transmission
•
Incorrect assembly of the transmission
TROUBLESHOOTING

SKIP GEARS

Axis changes
•
Pedal position error changes
•
The top of the lever returns so
incorrect
Forks of changes
•
Worn shift fork
Shift drum
•
Axial incorrect
•
Treadwear drum changes
Transmission
•
Wear lace Gear
CLUTCH FAILURE
Clutch slips
1. Clutch
•
Improper clutch assembly
•
Incorrect cable free play
•
Clutch spring fatigued or weak
•
Wear of the friction discs
•
Wear of the clutch plates
2. Engine Oil
•
Improper oil level
•
Improper oil viscosity (low)
•
Oil deterioration
Clutch Drag
1. Clutch
•
Uneven tension clutch springs
•
Warped pressure plate
•
Bent clutch disc
•
Friction disc swelling
•
Clutch push rod bent
•
Fractured disc holder
•
Primary gear bushing burned
2. Engine Oil
•
Improper oil level
•
Improper oil viscosity (High)
•
Oil deterioration
OVERHEATING
Ignition system
• Electrode gap of spark plug incorrect
•
Heat range spark plug incorrect
•
Defective CDI
8.2