Yamaha ATV Service and Repair Manual. This manual covers seven models of the Yamaha YFZ450 and YFZ450R ATV manufactured between 2004 and 2017.

Includes Color Wiring Diagrams

Clymer ATV repair manuals are written specifically for the do-it-yourself enthusiast. From basic maintenance to troubleshooting to complete overhaul, Clymer manuals provide the information you need. The most important tool in your tool box may be your Clymer manual, get one today.

• YFZ450 & YFZ450R (2004-2017)

Every Clymer manual contains hundreds of original photographs and illustrations developed from a complete disassembly and assembly of the motorcycle. This, in addition to extensive research, allows Clymer to achieve an un-matched level of detail, accuracy & clarity.

The step-by-step instructions and two column text with large print are user friendly, bold figure numbers make it easy to quickly match instructions with illustrations and photos. Thumb tabbed chapters, numbered table of contents and extensive index make it possible to locate the desired section quickly. This manual includes a Quick Reference Data section with frequently used specifications and the following chapters:

QUICK REFERENCE DATA

CHAPTER ONE / GENERAL INFORMATION
Manual organization / Warnings, cautions and notes / Safety / Serial numbers and information labels / Fasteners / Shop supplies / Tools / Measuring tools / Electrical system fundamentals / Service methods / Storage / Specifications

CHAPTER TWO / TROUBLESHOOTING
Starting the engine / Engine spark test / Engine performance / Engine noise / Engine leakdown test / Clutch / External shift mechanism and transmission / Electrical testing / Engine starting system / Brakes / Steering and handling

CHAPTER THREE / LUBRICATION AND MAINTENANCE
Pre-ride inspection / Engine oil / Air filter / Control cable inspection and lubrication / Throttle cable and speed limiter adjustment / Clutch lever / Brakes / Drive chain / Tires and wheels / Front wheel bearing inspection / Steering system / Front suspension / Rear suspension / Battery / Cooling system / Carburetor / Crankcase breather hoses / Spark plug / Ignition timing inspection / Compression test / Valve clearance adjustment / Exhaust system / Fastener inspection / Specifications

CHAPTER FOUR / ENGINE TOP END
Exhaust system / Cylinder head cover / Camshafts / Camshaft bearing clearance measurement / Cam chain tensioner / Cam chain and guide / Cylinder head / Valves / Cylinder / Piston and piston rings / Specifications

CHAPTER FIVE / ENGINE LOWER END
Engine / Torque limiter / Left crankcase cover / Starter idle gear / Flywheel (alternator rotor) and starter clutch / Camshaft chain and guides / Right crankcase cover / Balancer and primary drive gears / Oil pump / Crankcase / Crankcase seal and bearing replacement / Crankshaft / Engine break-in / Specifications

CHAPTER SIX / CLUTCH AND EXTERNAL SHIFT MECHANISM
Clutch cover / Clutch / Clutch release lever assembly / External shift mechanism / Clutch cable / Specifications

CHAPTER SEVEN / TRANSMISSION AND INTERNAL SHIFT MECHANISM
Transmission service notes / Mainshaft / Countershaft / Transmission inspection / Shift drum and forks / Specifications

CHAPTER EIGHT / FUEL SYSTEM AND EMISSION CONTROL
Carburetor / Float adjustment / Carburetor adjustment and rejetting / Air box / Fuel tank / Fuel valve / Throttle cable / Crankcase breather system / Specifications

CHAPTER NINE / ELECTRICAL SYSTEM
Electrical component replacement / Continuity testing / Electrical connectors / Negative battery terminal / Battery / Charging system / Alternator / Ignition system / Starter / Starting circuit cutoff system / Starter relay / Lighting system / Cooling system / Throttle position sensor / Switches / Specifications

CHAPTER TEN / COOLING SYSTEM
Cooling system service notes / Pressure test / Hoses and clamps / Radiator / Coolant reservoir / Radiator fan / Water pump housing / Water pump / Specifications

CHAPTER ELEVEN / WHEELS, TIRES AND DRIVE CHAIN
Wheel / Tires / Sprockets / Drive chain / Specifications

CHAPTER TWELVE / FRONT SUSPENSION AND STEERING
Handlebar / Shock absorbers / Front wheel hub / Tie rods / Steering knuckle / Control arms / Steering shaft / Specifications

CHAPTER THIRTEEN / REAR AXLE AND SUSPENSION
Wheel hub / Rear axle / Rear axle hub / Shock absorber / Shock linkage / Swing arm / Specifications

CHAPTER FOURTEEN / BRAKES
Brake fluid selection / Brake service notes / Front brake pads / Front brake caliper / Front master cylinder / Rear brake pads / Rear brake caliper / Rear master cylinder / Rear brake pedal / Brake disc / Front brake hose/tube removal installation / Rear brake hose removal/installation / Brake system draining / Brake bleeding / Specifications

CHAPTER FIFTEEN / BODY
Seat / Fuel tank cover / Fuel tank shield / Side covers / Front fender / Rear fender / Foot protectors / Footrests / Engine skidplate / Specifications

SUPPLEMENT / 2009-ON YFZ450R
General information / Troubleshooting / Electronic diagnostic system / Lubrication and maintenance / Engine oil / Idle speed / Spark plug / Engine top end / Cylinder head / Piston and piston rings / Engine lower end / Torque limiter / Left crankcase cover / Starter idle gear / Clutch and external shift mechanism / Clutch / External shift mechanism / Transmission and internal gearshift mechanism / Transmission mainshaft / Transmission countershaft / Shift forks / Fuel injection system / System operation / Fuel delivery system tests / Fuel pump / Throttle body / Throttle position sensor (TPS) / Engine control unit (ECU) / Intake air pressure (IAP) sensor / Intake air temperature sensor / Coolant temperature sensor / Electrical system / Crankshaft position sensor / Ignition system / Ignition coil / Spark plug cap / Radiator fan thermoswitch / Fuel sending unit / Speed sensor / Fuel injection system fuse / Main (fuel system) relay / Lean angle sensor / Starter / Cooling system / Water pump / Wheel, tires and drive chain / Front suspension and steering / Handlebar holders / Steering shaft / Brakes / Rear brake master cylinder / Body

INDEX

COLOR WIRING DIAGRAMS