Market Segment:
Mid-size utility ATV
Target User:
Recreational riders, utility users, farm work, trail riding
Key Competitors:
Honda Rancher, Kawasaki Bayou, Suzuki King Quad (specific displacements of the era)
Engine Type:
Reliable air-cooled, single-cylinder engine
Transmission Type:
Yamaha's renowned Ultramatic automatic transmission with engine braking
Drive System:
Selectable 2WD/4WD with limited-slip front differential (4WD model)
Suspension Type:
Independent front suspension, swingarm rear suspension
Engine Service:
Full engine overhaul, disassembly, assembly, tuning, and diagnostics
Fuel System:
Carburetor inspection, cleaning, adjustment, fuel pump, fuel lines, and tank service
Transmission Drivetrain:
Automatic transmission (Ultramatic), clutch, drive shafts, differentials, and final drive service
Cooling System:
Radiator, fan, coolant flow, water pump inspection and service
Electrical System:
Ignition system, starting system, charging system (stator, regulator/rectifier), lighting, battery, and wiring diagrams
Braking System:
Front and rear brake calipers, master cylinders, brake lines, brake fluid specifications, and bleeding procedures
Suspension Steering:
Front and rear suspension components (shocks, A-arms, bushings), steering column, tie rods, and wheel alignment
Frame Bodywork:
Frame inspection, body panel removal/installation, seat, fenders, racks, and storage components
Wheels Tires:
Tire pressure, wheel removal/installation, lug nut torque specifications
Routine Maintenance:
Oil changes, filter replacements, spark plug service, air filter cleaning/replacement, lubrication points
Troubleshooting:
Diagnostic charts for common starting, running, electrical, and mechanical issues
Engine Repair:
Top-end rebuild (cylinder, piston, rings), valve clearance adjustment, camshaft replacement
Transmission Repair:
Clutch adjustment, belt inspection/replacement, drive system component servicing
Electrical Diagnostics:
Wiring harness troubleshooting, component testing (e.g., CDI, ignition coil, charging system components)
Brake System Overhaul:
Caliper rebuild, master cylinder replacement, brake line flushing
Suspension Rebuild:
Shock absorber service, bushing replacement, steering component replacement
Wheel Alignment:
Adjustment procedures and specifications for steering geometry
Depth Of Coverage:
Comprehensive factory-level service and repair
Diagnostic Information:
Includes detailed diagnostic flowcharts and fault code interpretation (where applicable)
Rebuild Procedures:
Detailed step-by-step instructions for major component rebuilds
Engine Type:
Four-stroke, SOHC, air-cooled, single-cylinder
Bore X Stroke:
83 mm x 64.5 mm
Horsepower Estimated:
Approx. 21-23 HP (at crank)
Torque Estimated:
Approx. 20-22 lb-ft (at crank)
Carburetor:
Mikuni BSR33/1, single carburetor
Fuel Capacity:
3.4 US gal (12.9 L) with 0.7 US gal (2.7 L) reserve
Oil Type Recommendation:
Yamalube 4 (or equivalent) SAE 10W-30 API SG or higher
Oil Capacity:
1.76 US qt (1.67 L) / 1.62 US qt (1.53 L) without filter change
Transmission Type:
Automatic (Yamaha Ultramatic®)
Drive Modes:
H (High), L (Low), N (Neutral), R (Reverse), P (Park)
Engine Braking:
Industry-leading, strong engine braking on descents
Clutch Type:
Wet, automatic centrifugal clutch with V-belt
Drive System:
Shaft drive
Front Differential:
Limited-slip (4WD model)
Final Drive Ratio:
Yamaha specific (detailed in manual)
Engine Oil Change:
Every 1000 km (600 miles) or 6 months (refer to manual for specifics)
Oil Filter Replacement:
Every 2000 km (1200 miles) or 12 months (refer to manual for specifics)
Air Filter Cleaning:
Every 500 km (300 miles) or as needed in dusty conditions
Spark Plug Replacement:
Every 6000 km (3600 miles) or annually
Valve Clearance Check:
Every 4000 km (2400 miles)
Brake Fluid:
DOT 3 or DOT 4
Coolant:
Permanent type antifreeze, 50/50 mix with distilled water
Gear Oil Capacity Front Differential:
Refer to manual for specific capacity and grade
Gear Oil Capacity Rear Differential:
Refer to manual for specific capacity and grade
Common Wear Items:
Brake pads, tires, bearings (especially if used in wet/muddy conditions), suspension bushings.
Potential Issues From Manual:
Manual will detail specific torque values for critical fasteners, potential common failure points identified by Yamaha, and diagnostic steps for intermittent issues.