Segment:
High-performance off-road/enduro motorcycle.
Target User:
Enthusiast riders, amateur racers, mechanics, DIY owners requiring in-depth repair information.
Competitors:
KTM 250 EXC-F, Honda CRF250X, Kawasaki KLX250, Suzuki RM-Z250 (off-road variants).
Vehicle Focus:
Agile handling, potent engine, advanced suspension, off-road capability.
Manual Value Proposition:
Provides essential, factory-level detail for maintaining peak performance and diagnosing complex issues.
Primary Coverage:
Yamaha WR250F (2008-2012)
Secondary Coverage Notes:
Will work with similar years (2009, 2010, 2011, 2012). Predecessor (2001-2006) covered by separate manual.
Estimated Page Count:
400-600
Type:
Complete Service Repair Workshop Manual
File Format Details:
High-resolution PDF, fully searchable text, printable pages.
Print Quality:
N/A (Digital Format)
Binding Type:
N/A (Digital Format)
Paper Type:
N/A (Digital Format)
Engine:
Engine overhaul, top end, bottom end, cylinder, piston, crankshaft, camshaft, valve timing, lubrication system, cooling system, fuel injection, ignition system.
Transmission:
Clutch, gearbox, shift mechanism, internal components, lubrication.
Chassis:
Frame, swingarm, suspension (front forks, rear shock), steering, wheels, tires, hubs, spokes.
Electrical:
Wiring diagrams, lighting, battery, charging system, ignition system, sensors, ECU, diagnostics, fault finding.
Brakes:
Hydraulic systems, calipers, master cylinders, brake lines, pads, rotors, bleeding procedures.
Fuel System:
Fuel tank, fuel pump, fuel injectors, fuel pressure regulator, fuel filter.
Exhaust System:
Muffler, header pipe, catalytic converter (if applicable), gasket replacement.
Cooling System:
Radiator, hoses, thermostat, coolant, fan (if equipped).
Bodywork:
Plastics, fairings, seat, fuel tank cover, fenders, mounting hardware.
Maintenance:
Oil change, filter replacement, chain adjustment, spark plug replacement, air filter cleaning/replacement, brake fluid flush, coolant flush, valve clearance check/adjustment.
Troubleshooting:
Diagnostic charts, common problems, solutions, electrical fault finding, mechanical issue diagnosis.
Repair:
Engine rebuild, transmission overhaul, suspension servicing, brake system repair, electrical component replacement, bodywork repair.
Disassembly Assembly:
Detailed step-by-step instructions for component removal and installation.
Depth:
Comprehensive, from basic rider maintenance to full engine and transmission rebuilds. Includes detailed diagrams and specifications.
Type:
Liquid-cooled, 4-stroke, DOHC, 4-valve single cylinder
Bore X Stroke:
77.0 mm x 53.6 mm
Compression Ratio:
12.5:1 (typical for this generation)
Horsepower:
Approx. 30-35 HP (at crankshaft, varies by specific tune and year)
Torque:
Approx. 23-26 Nm (at crankshaft, varies by specific tune and year)
Induction:
Fuel Injection (YCC-FI - Yamaha Chip Controlled Fuel Injection)
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/96 AKI
Fuel Tank Capacity:
Approx. 2.1 gallons (8.0 Liters)
Oil Type:
Yamalube (or equivalent) SAE 10W-40, API SG or higher, JASO MA certified
Oil Capacity W Filter:
Approx. 1.42 US qt (1.35 L)
Coolant Type:
High-quality ethylene glycol-based coolant, 50/50 mix with distilled water
Type:
Constant mesh 5-speed sequential
Clutch Type:
Wet, multiple-disc
Gear Ratios:
Specific ratios detailed in manual (e.g., 1st: 2.615, 2nd: 1.875, 3rd: 1.500, 4th: 1.250, 5th: 1.050 - typical for this model).
Transmission Oil Type:
Yamalube (or equivalent) SAE 80 GL-4 hypoid gear oil
Transmission Oil Capacity:
Approx. 0.73 US qt (0.69 L)
Engine Oil Change:
Every 1000 km or 3 months (whichever comes first) under normal use. More frequent for severe off-road use.
Oil Filter Replacement:
At every oil change.
Air Filter Cleaning:
Every 500 km or more frequently in dusty conditions.
Spark Plug Replacement:
Refer to manual for specific mileage, typically around 6,000-10,000 km.
Valve Clearance Check:
Every 5,000 km or as specified in the manual.
Engine Oil Specification:
Yamalube 10W-40, API SG/SH/SJ/SL, JASO MA.
Transmission Oil Specification:
Yamalube SAE 80 GL-4 hypoid gear oil.
Coolant Specification:
50/50 mix of high-quality ethylene glycol coolant and distilled water.
Brake Fluid Specification:
DOT 4 hydraulic brake fluid.
Common Wear Items:
Clutch plates, piston rings, valve stem seals, wheel bearings, steering head bearings, fork seals, chain and sprockets.
Potential Faults:
Fuel pump issues (rare), stator output degradation, stator connector overheating (in some earlier models/conditions), potential for stator failure leading to no-spark condition.
Manufacturer:
Yamaha Motor Corporation, established 1955, renowned for innovation in motorcycles, marine products, and musical instruments.
Wr Series Introduction:
The WR series has a long lineage of off-road competition bikes, evolving from earlier YZ models.
2008 Model Updates:
This generation (introduced around 2007/2008) featured significant updates including fuel injection and revised chassis geometry for improved performance and handling over previous carbureted models.
Manufacturing Location:
Japan (primary)
