Yamaha YZ250F & WR250F Motorcycle (2001-2003) Service Repair Manual Description Clymer motorcycle 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.Every Clymer manual contains hundreds of original photographs and illustrations developed from a complete disassembly and assembly of a motorcycle. This in addition to extensive research allows Clymer to achieve an unmatched level of detail accuracy and 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 an extensive index make it possible to locate the desired section quickly. Contents This Yamaha motorcycle manual is 456 pages. QUICK REFERENCE DATA CHAPTER ONE / GENERAL INFORMATION Manual organization / Warnings cautions and notes / Safety / Serial numbers / Fasteners / Shop supplies / Basic tools / Bike stand / Precision measuring tools / Electrical system fundamentals / Special tools / Basic service methods / Storage / Specification CHAPTER TWO / TROUBLESHOOTING Operating requirements / Starting the engine / Engine spark test / Engine performance / Engine noise / Cylinder head / Cylinder and piston / Preignition / Detonation / Engine noises / Engine leak down test / Fuel system / Clutch / External shift mechanism and transmission / Kickstarter / Electrical testing / Lighting system / Electric starter / Charging system / Ignition system / Throttle position sensor / Front suspension and steering / Rear suspension / Frame noise / Brakes / Specification CHAPTER THREE / LUBRICATION MAINTENANCE AND TUNE-UP Maintenance schedule intervals / Pre-ride inspection / Engine oil and filter / Air filter / Ignition timing / Spark plug / Engine compression check / Engine top end inspection / Valve clearance / Flywheel nut / Engine break-in / Specifications CHAPTER FOUR / ENGINE TOP END Shop cleanliness / Exhaust system / Cylinder head cover / Camshafts and cam chain tensioner / Cam chain and guides / Cylinder head / Valve lifters and shims / Valves / Cylinder / Piston and piston rings / Specifications CHAPTER FIVE / ENGINE LOWER END Shop cleanliness / Engine removal and installation / Crankcase / Crankcase seal and bearing replacement / Oil pump drive gear pivot shaft / Crankshaft / Specifications CHAPTER SIX / CLUTCH OIL PUMP KICKSTARTER AND EXTERNAL SHIFT MECHANISM Torque specifications / Right crankcase cover / Clutch cover / Clutch push lever / Balancer and primary drive gears / Oil pump / Kickstarter and kick idle gear / External shift mechanism / Clutch cable / Specifications CHAPTER SEVEN / TRANSMISSION AND INTERNAL SHIFT MECHANISM Mainshaft / Countershaft / Inspection / Shift drum and forks / Specifications CHAPTER EIGHT / FUEL SYSTEM Carburetor / Float height adjustment / Carburetor rejetting / Fuel tank / Fuel shutoff valve / Throttle cable replacement / Hot start cable / Specifications CHAPTER NINE / ELECTRICAL SYSTEM Left crankcase cover / Flywheel and stator / Stator coils / Stator coil / Flywheel and starter clutch / Ignition coil / Ignition coil / Capacitor discharge ignition unit CDI / Ignition component testing / Ignition timing / Throttle position sensor / Lighting system / Lighting system testing / Voltage regulator / Battery / Charging system / Starter / Starter relay switch / ...