Yamaha Tracer MT09TRAH 2017 Service Manual page 550

• Damaged pipe
• Improperly connected pipe
Fuel system
1. Throttle body (-ies)
• Damaged or loose throttle body joint
2. Air filter
• Clogged air filter element
Chassis
1. Brake(s)
• Dragging brake
Electrical system
1. Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
2. Ignition system
• Faulty ECU
EAS30608
OVERCOOLING
Cooling system
1. Thermostat
• Thermostat stays open
EAS30609
POOR BRAKING PERFORMANCE
• Worn brake pad
• Worn brake disc
• Air in hydraulic brake system
• Leaking brake fluid
• Faulty brake caliper kit
• Faulty brake caliper seal
• Loose union bolt
• Damaged brake hose
• Oil or grease on the brake disc
• Oil or grease on the brake pad
• Incorrect brake fluid level
EAS30610
FAULTY FRONT FORK LEGS
Leaking oil
• Bent, damaged or rusty inner tube
• Cracked or damaged outer tube
• Improperly installed oil seal
• Damaged oil seal lip
• Incorrect oil level (high)
• Loose damper rod assembly bolt
• Damaged damper rod assembly bolt copper
washer
• Cracked or damaged cap bolt O-ring
Malfunction
• Bent or damaged inner tube
• Bent or damaged outer tube
• Damaged fork spring
• Worn or damaged outer tube bushing
• Bent or damaged damper rod
TROUBLESHOOTING
• Incorrect oil viscosity
• Incorrect oil level
EAS30611
UNSTABLE HANDLING
Handlebar
• Bent or improperly installed handlebar
Steering head components
• Improperly installed upper bracket
• Improperly installed lower bracket
(improperly tightened ring nut)
• Bent steering stem
• Damaged ball bearing or bearing race
Front fork leg(s)
• Uneven oil levels (both front fork legs)
• Unevenly tensioned fork spring (both front fork
legs)
• Broken fork spring
• Bent or damaged inner tube
• Bent or damaged outer tube
Swingarm
• Worn bearing or bushing
• Bent or damaged swingarm
Rear shock absorber assembly
• Faulty rear shock absorber spring
• Leaking oil or gas
Tire(s)
• Uneven tire pressures (front and rear)
• Incorrect tire pressure
• Uneven tire wear
Wheel(s)
• Incorrect wheel balance
• Deformed cast wheel
• Damaged wheel bearing
• Bent or loose wheel axle
• Excessive wheel runout
Frame
• Bent frame
• Damaged steering head pipe
• Improperly installed bearing race
EAS30612
FAULTY LIGHTING OR SIGNALING SYSTEM
Headlight does not come on
• Faulty dimmer/pass switch
• Too many electrical accessories
• Hard charging
• Incorrect connection
• Improperly grounded circuit
• Poor contacts (main or light switch)
• Faulty headlight assembly
Tail/brake light does not come on
• Faulty brake light switch
• Too many electrical accessories
9-3