Vehicle Segment:
High-performance sport ATV, known for its powerful engine and agile handling
Key Competitors:
Honda TRX450R, Suzuki LT-R450, Kawasaki KFX450R
Powertrain Highlight:
Torque-rich 686cc liquid-cooled DOHC engine with fuel injection
Chassis Highlight:
Lightweight hybrid frame combining steel and aluminum for optimal rigidity and handling
Suspension Highlight:
Long-travel independent front suspension and Y-arm rear suspension for excellent bump absorption
Engine Systems:
General information, Maintenance, Lubrication system, Cooling system, Fuel system, Engine mechanical, Clutch, Alternator, Ignition system
Drivetrain Systems:
Transmission, Driveshaft/Final Drive (if applicable to model variant)
Chassis Systems:
Frame, Bodywork, Exhaust system, Front wheel, Suspension, Steering, Rear wheel, Brakes
Electrical Systems:
Battery, Charging system, Electrical components, Lights, Switches, Wiring diagram
Troubleshooting:
Extensive troubleshooting guides and diagnostics
Repair Procedures:
Step-by-step repair instructions for all covered systems
Maintenance Procedures:
Scheduled maintenance tasks, fluid changes, filter replacements
Diagnostic Procedures:
Fault finding and diagnostic routines
Disassembly Assembly:
Complete disassembly and reassembly guidance
Depth Of Information:
Factory-level detail, suitable for both DIY and professional mechanics
Illustrations Diagrams:
Detailed illustrations and step-by-step photos
Engine Code:
Likely 1PE or similar designation for the 686cc engine
Engine Bore X Stroke:
100.0 mm x 84.0 mm
Valve Train:
SOHC, 4 valves per cylinder
Horsepower Estimate:
Estimated 50-55 HP (varies slightly by region and tuning)
Torque Estimate:
Estimated 45-50 lb-ft
Fuel Delivery System:
Mikuni 44mm throttle body, Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher motorcycle oil)
Oil Capacity:
Approx. 2.40 L (2.54 US qt) / 2.10 L (2.22 US qt) without filter change
Transmission Type:
Constant mesh, 5-speed with wet multi-plate clutch and reverse
Clutch Operation:
Hydraulic clutch
1St Gear Ratio:
2.643 (37/14)
2Nd Gear Ratio:
1.941 (33/17)
3Rd Gear Ratio:
1.529 (26/17)
4Th Gear Ratio:
1.250 (25/20)
5Th Gear Ratio:
1.045 (23/22)
Reverse Gear Ratio:
3.182 (35/11)
Transmission Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher motorcycle oil)
Transmission Oil Capacity:
Approx. 0.80 L (0.85 US qt)
Oil And Filter Change:
Every 3,000 km (1,860 miles) or 6 months
Air Filter Cleaning:
Every 1,000 km (620 miles) or 3 months (or more frequently in dusty conditions)
Spark Plug Inspection:
Every 3,000 km (1,860 miles) or 6 months
Valve Clearance Check:
First check at 20,000 km (12,400 miles), then every 10,000 km (6,200 miles)
Coolant Type:
Yamaha Coolant (or equivalent ethylene glycol-based coolant with deionized water, 50:50 mixture)
Common Wear Item:
Clutch plates (due to aggressive riding), wheel bearings, tie rod ends
Potential Electrical Issue:
Occasional issues with voltage regulator or stator on early models (though less common on this generation)
Fuel System Maintenance:
Regular fuel system cleaning and injector checks recommended, especially with ethanol fuels
