Category:
Performance Off-Road Motorcycle
Target Segment:
Motocross and Enduro enthusiasts
Key Competitors:
KTM 250 EXC-F, Honda CRF250X, Kawasaki KX250F
Model Focus:
Off-road performance, agility, and Yamaha's renowned reliability
Manual Value Proposition:
Comprehensive, detailed, and instantly accessible repair and maintenance resource
Engine:
Full engine service, top end, bottom end, lubrication, cooling, fuel and emissions
Transmission:
Clutch, gearbox, shifting mechanism
Electrical System:
Ignition, charging system, starting system, lighting, instruments, wiring diagrams
Chassis:
Frame, suspension (front and rear), steering, wheels, tires, brakes
Fuel System:
Fuel injection system, fuel pump, injectors, pressure regulator
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks
Troubleshooting:
Diagnostic procedures for common problems and symptoms
Major Repairs:
Engine rebuilds, transmission overhaul, suspension component replacement
Component Disassembly Reassembly:
Step-by-step instructions for complete disassembly and reassembly of all major components
Wiring Schematics:
Comprehensive electrical wiring diagrams for all systems
Depth Of Information:
Complete and detailed, covering all aspects of service and repair
Diagnostic Capabilities:
Detailed troubleshooting trees and fault code explanations (if applicable)
Illustrations Diagrams:
Hundreds of photos and diagrams to guide procedures
Searchability:
Fully Indexed for Easy Navigation
Printability:
All pages are printable
Software Requirement:
Adobe PDF Reader
Compatibility:
Compatible with all Windows & Mac computers (Windows 7, Vista 32/64, XP, ME, 98, NT, 2000 etc.)
Image Resolution:
High-quality (suitable for professional repair and reference)
Engine Type:
4-stroke, Liquid-cooled, DOHC, 4-valve
Bore X Stroke:
77.0 mm x 53.6 mm
Compression Ratio:
12.5:1
Horsepower:
Approx. 37-40 HP (dependent on tuning and specific model variant)
Fuel Delivery:
Electronic Fuel Injection (EFI) with dual injectors
Fuel Type:
Unleaded gasoline, 91 octane or higher recommended
Recommended Oil Grade:
Yamalube 4 (or equivalent SAE 10W-40) API SG or higher
Oil Capacity With Filter:
1.50 L (1.59 US qt)
Coolant Type:
Yamaha-specific coolant or equivalent, 50/50 mixture with distilled water
Transmission Type:
Constant-mesh 5-speed
Clutch Type:
Wet, multiple-disc, cable-actuated
Gear Ratios:
1st: 2.750, 2nd: 1.867, 3rd: 1.350, 4th: 1.111, 5th: 0.917
Transmission Oil Grade:
Yamalube 4 (or equivalent SAE 10W-40) API SG or higher
Transmission Oil Capacity:
0.60 L (0.63 US qt)
Crash Safety Rating:
N/A (Off-road motorcycle)
Braking System Front:
Hydraulic single disc, 250 mm diameter
Braking System Rear:
Hydraulic single disc, 245 mm diameter
Lighting System:
Halogen headlight, LED taillight
Infotainment System:
N/A (Basic off-road instrumentation)
Rider Aids:
N/A (Mechanical focus, no electronic rider aids)
Connectivity Features:
N/A
Instrument Cluster:
Digital LCD: Speedometer, odometer, trip meter, clock, hour meter, fuel level warning
Engine Oil Change Interval:
Every 1000 km (600 miles) or 6 months, or more frequently under severe use
Oil Filter Replacement Interval:
Every 2000 km (1200 miles) or 12 months, or with every oil change if possible
Air Filter Cleaning Interval:
Regularly, depending on riding conditions (e.g., after each ride in dusty conditions)
Spark Plug Inspection Interval:
Every 4000 km (2500 miles)
Coolant Ratio:
50% ethylene glycol based coolant and 50% distilled water
Common Wear Items:
Clutch plates, chain and sprockets, brake pads, fork seals, wheel bearings
Potential Issues 2008 Model:
While generally reliable, early EFI systems can be sensitive to fuel quality and may require sensor cleaning/replacement. Some riders report suspension tuning adjustments for optimal performance.
Manufacturer Origin:
Japan
Brand Philosophy:
Performance, innovation, and reliability in powersports
Previous Generation Features:
Early WR250F models featured carbureted engines and different suspension designs
Key Updates 2008:
Likely includes EFI improvements, revised suspension settings, and chassis updates for better handling and performance
Manufacturing Location:
Japan