Positioning:
High-performance sport ATV, benchmark for its class
Competitors:
Honda TRX450R, Suzuki LT-R450, Kawasaki KFX450R
Engine Performance:
Powerful 686cc liquid-cooled engine with broad powerband and strong torque
Chassis Design:
Lightweight, narrow chassis for agility and rider control
Suspension:
Fully adjustable long-travel suspension for excellent handling and comfort
Transmission:
Slipper clutch for reduced engine braking during aggressive downshifts
Braking:
Powerful dual front disc brakes and single rear disc brake
User Profile:
Enthusiast riders, off-road racers, recreational trail riders
Engine:
5-valve DOHC, liquid-cooled, 4-stroke
Ignition System:
TCI (Transistor Controlled Ignition)
Fuel Delivery:
Mikuni BSR42 Carburetor (or EFI on later models, confirmed for 2006 model specified)
Clutch:
Wet, multi-disc, Slipper Clutch
Transmission:
5-speed constant mesh, constant velocity, chain drive
Suspension Front:
Independent double-wishbone with fully adjustable spring pre-load, compression and rebound damping
Suspension Rear:
Swingarm with fully adjustable spring pre-load, compression and rebound damping
Brakes Front:
Dual hydraulic discs
Brakes Rear:
Hydraulic disc
Electrical System Components:
Battery, starter, lighting, CDI unit, sensors
Disassembly And Assembly:
Step-by-step for all major components
Troubleshooting Engine Performance:
Detailed diagnostic flowcharts
Carburetor Adjustment And Cleaning:
Included
Valve Clearance Adjustment:
Included
Clutch Adjustment And Replacement:
Included
Suspension Fork And Shock Rebuild:
Included
Brake Bleeding And Pad Replacement:
Included
Electrical Component Testing:
Included
Wiring Diagram Interpretation:
Detailed explanation
Maintenance Scheduling:
Provided
Part Replacement:
Step-by-step guides
Depth:
Comprehensive (from basic maintenance to full engine rebuild)
Searchable:
Yes (text-based PDF)
Resolution:
High-resolution, suitable for printing
Printability:
Excellent (designed for home printing)
Binding Recommendation:
Digital download, user to print and bind as desired
Paper Recommendation:
Standard printer paper, glossy for diagrams is optional
Engine Type:
Liquid-cooled, 4-stroke, DOHC, 4-valve
Bore X Stroke:
100.0 mm x 83.9 mm
Horsepower Estimated:
Approximately 50-55 HP (crankshaft)
Torque Estimated:
Approximately 45-50 lb-ft (crankshaft)
Carburetor:
Mikuni BSR42, single, with accelerator pump
Oil Type Specification:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher, JASO certified)
Coolant Type Specification:
50/50 mixture of antifreeze and distilled water
Transmission Type:
Constant mesh, 5-speed
Clutch Type:
Wet, multi-disc, Slipper Clutch
Final Drive:
O-ring sealed chain, 520
Slipper Clutch Benefit:
Reduces force on the clutch spring, making clutch lever pull lighter. Also reduces engine braking effect when downshifting aggressively to prevent rear-wheel hop or lock-up.
Transmission Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher, JASO certified)
Atv Safety Classification:
Sport ATV (designed for experienced riders)
Throttle Limiter:
Not typically equipped from factory on performance models, but can be adjusted/removed per manual's guidance
Kill Switch:
Standard handlebar-mounted engine kill switch
Anti Kickback Steering:
Integrated into steering geometry
Footwells:
Integrated footpegs with heel guards
Display Features:
Digital meter with odometer, trip meter, clock, and neutral indicator. No advanced infotainment on this model.
ABS:
Not available on the 2006 model.
Bluetooth Usb:
Not applicable for this model year.
Engine Oil Change:
Every 30-40 operating hours or annually, whichever comes first
Oil Filter Replacement:
Replace with oil change
Air Filter Cleaning:
Every 10-15 operating hours, or more frequently in dusty conditions
Valve Clearance Check:
Every 120 operating hours or annually
Spark Plug Replacement:
Check every 120 hours, replace as needed
Chain Lubrication And Adjustment:
Every 10-15 operating hours, or after washing/riding in wet conditions
Engine Oil Capacity:
2.3 L (2.4 US qt) without filter change; 2.5 L (2.6 US qt) with filter change
Coolant Capacity:
2.20 L (2.3 US qt)
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid
Common Wear Items:
Brake pads, chain and sprockets, wheel bearings, tie rod ends, steering stem bearings
Electrical Gremlins:
Occasionally reported, often related to connections or grounds; manual is critical for diagnosis.
Clutch Slippage:
Can occur with aggressive riding or if oil is not maintained correctly; manual details inspection and adjustment.
Carburetor Idling Issues:
May require cleaning or adjustment due to fuel quality or debris; manual covers troubleshooting.
Manufacturer Origin:
Japan
Brand Specialization:
Renowned for motorcycles, ATVs, marine engines, and musical instruments.
Predecessor:
Yamaha Warrior 350, Yamaha Raptor 660R
Key Innovation At Launch:
Introduction of the larger 686cc engine, advanced fuel injection (on later models), and refined chassis/suspension compared to predecessors.
Manufacturing Location:
Primarily Japan, with some components possibly sourced globally.
