Diagnosis and troubleshooting of motorcycle Yamaha FZ1 (2006-2015)
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.
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Engine starting failures
Engine 1. Cylinder(s) and cylinder head(s) Loose spark plug Loose cylinder head or cylinder Damaged cylinder head gasket Damaged cylinder gasket Worn or damaged cylinder Incorrect valve clearance Improperly sealed valve Incorrect valve-to-valve-seat...
Engine 1. Cylinder(s) and cylinder head(s) Loose spark plug Loose cylinder head or cylinder Damaged cylinder head gasket Damaged cylinder gasket Worn or damaged cylinder Incorrect valve clearance Improperly sealed valve Incorrect valve-to-valve-seat...
Incorrect engine idling speed
Engine 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...
Engine 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...
Poor medium-and-high-speed performance
Refer to « Starting failures ». Engine 1. Air filter Clogged air filter element Fuel system 1. Fuel pump Faulty fuel pump
Refer to « Starting failures ». Engine 1. Air filter Clogged air filter element Fuel system 1. Fuel pump Faulty fuel pump
Shift pedal does not move
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...
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...
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
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...
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...
Engine overheating and overcooling
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...
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...
Poor braking performance
Braking system 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...
Braking system 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...
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...
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...
Unstable handling
1. Handlebar Bent or improperly installed handlebar 2. Steering head components Improperly installed upper bracket Improperly installed lower bracket (improperly tightened ring nut) Bent steering stem Damaged ball bearing or bearing race 3. Front...
1. Handlebar Bent or improperly installed handlebar 2. Steering head components Improperly installed upper bracket Improperly installed lower bracket (improperly tightened ring nut) Bent steering stem Damaged ball bearing or bearing race 3. Front...
Faulty lighting or signaling system
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...
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...
Troubleshooting at the ABS warning light
When the main switch is turned «ON». (Engine does not start). Only the ABS warning light does not come on Defective connection of the ABS wire harness and the wire harness Defective connection of the ABS wire harness and the ABS ECU ABS warning...
When the main switch is turned «ON». (Engine does not start). Only the ABS warning light does not come on Defective connection of the ABS wire harness and the wire harness Defective connection of the ABS wire harness and the ABS ECU ABS warning...
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- Information for owner
- Control devices
- Operation manual
- Technical characteristics
- Maintenance
- Troubleshooting
- Engine and systems
- Engine repair
- Lube system
- Cooling system
- Fuel system
- Starting and charging system
- Transmission
- Running gear and frame
- Frame and hinged elements
- Wheels and tires
- Brake system
- Front suspension
- Rear suspension
- Electric equipment
- Equipment and devices
- ABS (anti-lock brake system)
- Electrical circuits