Yamaha YZF-R1 2007 Service Manual

TROUBLESHOOTING9-3• Incorrect oil viscosity• Inferior oil qualityCooling system1. Coolant• Low coolant level2. Radiator• Damaged or leaking radiator• Faulty radiator cap• Bent or damaged radiator fin3. Water pump• Damaged or faulty water pump• Thermostat• Thermostat stays closed• Clogged or damaged oil cooler• Damaged hose• Improperly connected hose• Damaged pipe• Improperly connected pipeFuel system1. Throttle body(-ies)• Faulty throttle body(-ies)• Damaged or loose throttle body joint2. Air filter• Clogged air filter elementChassis1. Brake(s)• Dragging brakeElectrical system1. Spark plug(s)• Incorrect spark plug gap• Incorrect spark plug heat range2. Ignition system• Faulty ignitor unitEAS28610OVER COOLINGCooling system1. Thermostat• Thermostat stays openEAS28620POOR 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 levelEAS28650FAULTY FRONT FORK LEGSLeaking 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 copperwasher• Cracked or damaged cap bolt O-ringMalfunction• 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 levelEAS28680UNSTABLE HANDLING1. Handlebar• Bent or improperly installed right handlebar• Bent or improperly installed left handlebar2. Steering head components• Improperly installed upper bracket• Improperly installed lower bracket(improperly tightened ring nut)• Bent steering stem• Damaged ball bearing or bearing race3. Front fork leg(s)• Uneven oil levels (both front fork legs)• Unevenly tensioned fork spring (both frontfork legs)• Broken fork spring• Bent or damaged inner tube• Bent or damaged outer tube4. Swingarm• Worn bearing or bushing• Bent or damaged swingarm5. Rear shock absorber assembly(-ies)• Faulty rear shock absorber spring• Leaking oil or gas6. Tire(s)• Uneven tire pressures (front and rear)• Incorrect tire pressure• Uneven tire wearManuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk