Yamaha Tracer MT09TRA - Service manual > General information

TIP

The following guide for troubleshooting does not cover all the possible causes of trouble. It should be helpful, however, as a guide to basic troubleshooting.

Refer to the relative procedure in this manual for checks, adjustments, and replacement of parts.

Starting failures

Engine

1. Cylinder(s) and cylinder head(s)

• Loose spark plug
• Loose cylinder head or cylinder
• Damaged cylinder head gasket
• Worn or damaged cylinder
• Incorrect valve clearance
• Improperly sealed valve
• Incorrect valve-to-valve-seat contact
• Incorrect valve timing
• Faulty valve spring
• Seized valve

2. Piston(s) and piston ring(s)

• Improperly installed piston ring
• Damaged, worn or fatigued piston ring
• Seized piston ring
• Seized or damaged piston

3. Air filter

• Improperly installed air filter
•  Clogged air filter element

4. Crankcase and crankshaft

• Improperly assembled crankcase
• Seized crankshaft

Fuel system

1. Fuel tank

• Empty fuel tank
• Clogged fuel tank cap breather hose
• Deteriorated or contaminated fuel
• Clogged or damaged fuel hose

2. Fuel pump

• Faulty fuel pump
• Faulty fuel pump relay

3. Throttle body (-ies)

• Deteriorated or contaminated fuel
• Sucked-in air

Electrical system

1. Battery

• Discharged battery
• Faulty battery

2. Fuse(s)

• Blown, damaged or incorrect fuse
• Improperly installed fuse

3. Spark plug(s)

• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator

4. Ignition coil(s)

• Cracked or broken ignition coil body
• Broken or shorted primary or secondary coils

5. Ignition system

• Faulty ECU
• Faulty crankshaft position sensor
• Broken generator rotor woodruff key

6. Switches and wiring

• Faulty main switch
• Faulty start/engine stop switch
• Broken or shorted wiring
• Faulty gear position switch
• Faulty sidestand switch
• Faulty clutch switch
•  Improperly grounded circuit
• Loose connections

7. Starting system

• Faulty starter motor
• Faulty starter relay
• Faulty starting circuit cut-off relay
• Faulty starter clutch

Incorrect engine idling speed

1. Cylinder(s) and cylinder head(s)

• Incorrect valve clearance
• Damaged valve train components

2. Air filter

• Clogged air filter element

Fuel system

1. Throttle body (-ies)

• Damaged or loose throttle body joint
• Improperly synchronized throttle bodies
• Improper throttle grip free play
• Flooded throttle body
• Faulty air induction system

Electrical system

1. Battery

• Discharged battery
• Faulty battery

2. Spark plug(s)

• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator

3. Ignition coil(s)

• Broken or shorted primary or secondary coils
• Cracked or broken ignition coil

4. Ignition system

• Faulty ECU
• Faulty crankshaft position sensor
• Broken generator rotor woodruff key

Poor medium-and-high-speed performance

Refer to "STARTING FAILURES"

Engine

1. Air filter

• Clogged air filter element

Fuel system

1. Throttle body (-ies)

• Faulty throttle body

2. Fuel pump

• Faulty fuel pump

Faulty gear shifting

Shift shaft

• Improperly adjusted shift rod
• Bent shift shaft

Shift drum and shift forks

• Foreign object in a shift drum groove
•  Seized shift fork
• Bent shift fork guide bar

Transmission

• Seized transmission gear
• Foreign object between transmission gears
• Improperly assembled transmission

Jumps out of gear

Shift shaft

• Incorrect shift pedal position
• Improperly returned stopper lever

Shift forks

• Worn shift fork

Shift drum

• Incorrect axial play
• Worn shift drum groove

Transmission

• Worn gear dog

Faulty clutch

Clutch slips

1. Clutch

• Improperly assembled clutch
• Improperly adjusted clutch cable
• Loose or fatigued clutch spring
• Worn friction plate
• Worn clutch plate

2. Engine oil

• Incorrect oil level
• Incorrect oil viscosity (low)
• Deteriorated oil

Clutch drags

1. Clutch

• Unevenly tensioned clutch springs
• Warped pressure plate
• Bent clutch plate
• Swollen friction plate
• Bent clutch pull rod
• Broken clutch boss
• Burnt primary driven gear bushing
• Match marks not aligned

2. Engine oil

• Incorrect oil level
• Incorrect oil viscosity (high)
• Deteriorated oil

Overheating

Engine

1. Clogged coolant passages

• Cylinder head(s) and piston(s)
• Heavy carbon buildup

2. Engine oil

• Incorrect oil level
• Incorrect oil viscosity
• Inferior oil quality

Cooling system

1. Coolant

• Low coolant level

2. Radiator

• Damaged or leaking radiator
• Faulty radiator cap
• Bent or damaged radiator fin

3. Water pump

• Damaged or faulty water pump

4. Thermostat

• Thermostat stays closed

5. Oil cooler

• Clogged or damaged oil cooler

6. Hose(s) and pipe(s)

• Damaged hose
• Improperly connected hose
• 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

Overcooling

Cooling system

1. Thermostat

• Thermostat stays open

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

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
• Incorrect oil viscosity
• Incorrect oil level

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

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
• Incorrect connection
• Faulty tail/brake light assembly

Turn signal does not come on

• Faulty turn signal switch
• Faulty turn signal/hazard relay
• Burnt-out turn signal bulb
• Incorrect connection
• Damaged or faulty wire harness
• Improperly grounded circuit
• Faulty battery
• Blown, damaged or incorrect fuse

Turn signal blinks slowly

• Faulty turn signal/hazard relay
•  Faulty main switch
• Faulty turn signal switch
• Incorrect turn signal bulb

Turn signal remains lit

• Faulty turn signal/hazard relay
• Burnt-out turn signal bulb

Turn signal blinks quickly

• Incorrect turn signal bulb
• Faulty turn signal/hazard relay
• Burnt-out turn signal bulb

Horn does not sound

• Damaged or faulty horn
• Faulty main switch
• Faulty horn switch
• Faulty battery
• Blown, damaged or incorrect fuse
• Faulty wire harness

Troubleshooting at the abs warning light

Refer to "BASIC PROCESS FOR TROUBLESHOOTING"

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