Segment:
Premium sport-utility all-terrain vehicle (ATV).
Key Competitors:
Honda Foreman/Rubicon, Polaris Sportsman, Can-Am Outlander, Kawasaki Brute Force.
Power Steering:
Electric Power Steering (EPS) for reduced steering effort and improved comfort.
Transmission:
Yamaha's exclusive Ultramatic automatic transmission with engine braking.
Engine Type:
Fuel-injected, liquid-cooled, SOHC, 4-stroke engine.
Drivetrain:
On-Command 2WD/4WD with differential lock.
Suspension:
Independent front and rear suspension for superior comfort and terrain handling.
Engine System:
Detailed coverage of the 686cc liquid-cooled SOHC engine, including disassembly, inspection, assembly, timing, valve adjustments, and component diagnostics.
Fuel System:
In-depth coverage of the fuel injection system (EFI), throttle body, fuel pump, injectors, fuel lines, and emissions control systems.
Transmission System:
Comprehensive information on the Ultramatic automatic transmission, including belt drive, CVT operation, gear shifting mechanisms, lubrication, and troubleshooting.
Drivetrain System:
Detailed procedures for servicing the Constant Velocity (CV) joints, driveshafts, front and rear differentials, final drive, and hub assemblies.
Suspension System:
Front and rear suspension systems, including independent double-wishbone, shock absorbers, springs, bushings, and alignment specifications.
Braking System:
Hydraulic disc brake systems, including master cylinders, calipers, brake lines, fluid specifications, bleeding procedures, and pad replacement.
Electrical System:
Comprehensive electrical schematics, ignition system, starting system, charging system (stator, regulator/rectifier), lighting, battery, and accessory wiring.
Cooling System:
Radiator, fan, coolant, hoses, thermostat, and cooling system pressure testing procedures.
Steering System:
Handlebar assembly, steering shaft, tie rods, and EPS (Electric Power Steering) system diagnostics and adjustments.
Frame And Bodywork:
Frame construction, body panel removal/installation, seat, fenders, racks, and storage compartment servicing.
Routine Maintenance:
Oil changes, filter replacements, spark plug inspection/replacement, air filter cleaning/replacement, lubrication points, and chain/belt adjustments.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and uncommon issues, including symptom-based troubleshooting guides.
Disassembly And Assembly:
Step-by-step instructions for dismantling and reassembling all major vehicle components and sub-assemblies.
Rebuild Procedures:
Detailed guidance for rebuilding major components such as the engine, transmission, and differential units.
Adjustments:
Precise instructions for making all necessary adjustments, including valve clearance, throttle cable, brake levers, and EPS settings.
Inspection And Testing:
Procedures for inspecting wear, damage, and proper function of all vehicle parts, along with testing electrical circuits and component performance.
Depth:
Comprehensive, covering everything from basic rider maintenance to complete engine and transmission rebuilds, suitable for both DIY enthusiasts and professional technicians.
Engine Type:
686cc liquid-cooled, SOHC, 4-stroke, 4-valve, single-cylinder
Bore X Stroke:
100.0 mm x 83.9 mm
Compression Ratio:
9.2 : 1
Fuel Induction:
Mikuni 44mm throttle body, EFI
Ignition:
TCI (Transistor Controlled Ignition)
Starting System:
Electric
Estimated Horsepower:
Approximately 46-49 HP (manufacturer data may vary)
Estimated Torque:
Approximately 42-44 lb-ft (manufacturer data may vary)
Fuel Type:
Unleaded gasoline (87 octane minimum recommended)
Fuel Tank Capacity:
4.76 US gallons (18 Liters)
Engine Oil Change:
Every 3000 km or 18 months, whichever comes first (check manual for specific conditions).
Spark Plug Inspection:
Every 6000 km or 36 months.
Air Filter Cleaning:
Every 1000 km or as needed based on operating conditions.
Transmission Oil Change:
Every 6000 km or 36 months.
Engine Oil Type:
Yamalube 4 10W-40 (API SG or higher, JASO MA compliant synthetic or semi-synthetic oil recommended).
Coolant Type:
Ethylene glycol-based non-metallic coolant (50% mixture recommended).
Brake Fluid Type:
DOT 4 brake fluid.
Gear Oil Type:
Yamalube Gear Oil 80W-90 (API GL-4).
Common Wear Items:
CV joint boots, front suspension bushings, wheel bearings, brake pads, and the drive belt (Ultramatic transmission) are common wear items subject to regular inspection and replacement.
Efi System Considerations:
Proper maintenance of the air filter and fuel system is crucial for optimal EFI performance. Occasional cleaning of the throttle body may be beneficial.
