Segment:
High-performance utility ATV segment.
Competitors:
Honda Foreman/Rancher, Polaris Sportsman, Can-Am Outlander, Suzuki King Quad.
Engine Type:
Fuel-injected, liquid-cooled, DOHC, 4-stroke engine.
Drivetrain Features:
On-Command® 4WD with 2WD/4WD and Differential Lock modes.
Steering Features:
Electronic Power Steering (EPS) for reduced fatigue.
Professional Standard:
Designed for professional mechanics and technicians.
User Access:
Accessible to DIY enthusiasts and experienced mechanics alike.
Engine:
Engine overhaul, top-end and bottom-end components, cooling system, lubrication system, fuel injection system.
Transmission:
Automatic transmission (Ultramatic), internal components, clutch, final drive.
Drivetrain:
4x4 system, front differential, rear differential, driveshafts, CV joints, drive chains.
Suspension:
Front and rear suspension systems, shock absorbers, control arms, ball joints, bushings.
Brakes:
Front and rear hydraulic disc brakes, brake calipers, master cylinders, brake lines, parking brake.
Electrical:
Ignition system, starting system, charging system (stator, regulator/rectifier), battery, lighting, sensors, ECU, wiring diagrams.
Steering:
Electric Power Steering (EPS) system, steering column, tie rods, steering knuckles.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel injectors, throttle body.
Cooling System:
Radiator, cooling fan, coolant hoses, thermostat, water pump.
Exhaust System:
Exhaust manifold, catalytic converter, muffler, exhaust pipes.
Bodywork Chassis:
Frame, body panels, plastics, seating, cargo racks, fenders.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication points, spark plug replacement, air filter cleaning/replacement.
Troubleshooting:
Diagnostic procedures for various issues, symptom analysis, common problems and solutions.
Repair:
Detailed step-by-step instructions for component removal, installation, and overhaul for all systems.
Disassembly Assembly:
Exploded diagrams and detailed instructions for complete disassembly and reassembly of major components and assemblies.
Specifications:
Torque specifications, clearances, adjustments, fluid capacities, and tolerances for all components.
Depth:
Comprehensive; covers everything from basic fluid checks to full engine rebuilds and complex electrical diagnostics.
Diagrams Photos:
Hundreds of detailed photos and exploded diagrams for visual guidance.
Engine Type:
4-stroke, DOHC, 4-valve, liquid-cooled single cylinder
Bore X Stroke:
102 mm x 84 mm
Horsepower:
Estimated ~45-50 hp (Actual figures vary by testing and tuning)
Torque:
Estimated ~40-45 lb-ft (Actual figures vary by testing and tuning)
Fuel Delivery:
Yamaha Fuel Injection (YFI) with 44mm throttle body
Fuel Type:
Unleaded gasoline (minimum 87 octane)
Cooling Method:
Liquid-cooled
Oil Type:
Yamaha Genuine 4-stroke Motor Oil 10W-40 (or equivalent JASO MA certified)
Engine Oil Capacity W Filter:
3.70 US qt (3.5 L)
Transmission Type:
Yamaha Ultramatic® V-belt automatic transmission with engine braking
Drive Select:
On-Command® 4WD (2WD, 4WD, 4WD with differential lock)
Gear Reduction:
Forward, Neutral, Reverse
Transmission Oil Type:
Yamalube 4 Universal Scooter Oil 10W-30 (or equivalent API SG or higher, JASO MA certified)
Transmission Oil Capacity:
0.70 US qt (0.67 L)
Initial Service:
Break-in service typically at 100-160 km (60-100 miles) or 1 month. Check manual for specifics.
Engine Oil Change:
Every 3 months or 1600 km (1000 miles) or 100 hours of use. Inspect more frequently under severe conditions.
Air Filter Cleaning:
Inspect every 800 km (500 miles) or 50 hours; clean as needed, especially in dusty conditions.
Spark Plug Replacement:
Replace every 5200 km (3200 miles) or 1 year. Check gap periodically.
Transmission Oil Change:
Every 12 months or 3200 km (2000 miles) or 200 hours of use.
Engine Oil Viscosity:
10W-40
Cooling Fluid Type:
Yamaha All-Weather Element-Resistant (WE) Coolant or equivalent (50/50 mix)
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid
Common Wear Items:
CV boots, wheel bearings, brake pads, and tie rod ends are common wear items on ATVs.
Eps System:
While generally robust, EPS sensors or motor can require diagnosis/replacement with extensive use or impacts.
