Yamaha FZ1-N Service Manual page 442

• Uneven tire pressures (front and rear)
• Incorrect tire pressure
• Uneven tire wear
7. Wheel(s)
• Incorrect wheel balance
• Deformed cast wheel
• Damaged wheel bearing
• Bent or loose wheel axle
• Excessive wheel runout
8. Frame
• Bent frame
• Damaged steering head pipe
• Improperly installed bearing race
EAS28710
FAULTY LIGHTING OR SIGNALING SYS-
TEM
Headlight does not come on
• Wrong headlight bulb
• Too many electrical accessories
• Hard charging
• Incorrect connection
• Improperly grounded circuit
• Poor contacts (main or light switch)
• Burnt-out headlight bulb
Headlight bulb burnt out
• Wrong headlight bulb
• Faulty battery
• Faulty rectifier/regulator
• Improperly grounded circuit
• Faulty main switch
• Faulty light switch
• Headlight bulb life expired
Tail/brake light does not come on
• Wrong tail/brake light bulb
• Too many electrical accessories
• Incorrect connection
• Burnt-out tail/brake light bulb
Tail/brake light bulb burnt out
• Wrong tail/brake light bulb
• Faulty battery
• Incorrectly adjusted rear brake light switch
• Tail/brake light bulb life expired
Turn signal does not come on
• Faulty turn signal switch
• Faulty turn signal relay
• Burnt-out turn signal bulb
• Incorrect connection
• Damaged or faulty wire harness
TROUBLESHOOTING
• Improperly grounded circuit
• Faulty battery
• Blown, damaged or incorrect fuse
Turn signal blinks slowly
• Faulty turn signal relay
• Faulty main switch
• Faulty turn signal switch
• Incorrect turn signal bulb
Turn signal remains lit
• Faulty turn signal relay
• Burnt-out turn signal bulb
Turn signal blinks quickly
• Incorrect turn signal bulb
• Faulty turn signal relay
• Burnt-out turn signal bulb
Horn does not sound
• Improperly adjusted horn
• Damaged or faulty horn
• Faulty main switch
• Faulty horn switch
• Faulty battery
• Blown, damaged or incorrect fuse
• Faulty wire harness
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