Vehicle Category:
High-performance sport ATV.
Target Audience:
Enthusiasts seeking off-road performance, racing, and recreational riding.
Key Competitors:
Honda TRX450R, Suzuki LT-R450, Kawasaki KFX450R.
Engine Type:
Liquid-cooled, DOHC, 4-valve, 4-stroke engine.
Chassis Design:
Lightweight, durable chassis with advanced suspension for optimal handling.
Efi Technology:
Electronic Fuel Injection for precise fuel delivery and throttle response.
Gytr Enhancements:
GYTR (Genuine Yamaha Technology Racing) editions often include performance upgrades and racing-specific components.
Engine:
Complete overhaul, disassembly, assembly, tuning, troubleshooting, lubrication, cooling system.
Fuel System:
Fuel injection system (EFI), throttle body, fuel pump, fuel filter, pressure regulator.
Ignition System:
Ignition coil, spark plug, CDI unit, timing.
Transmission:
5-speed manual transmission, clutch operation, gears, bearings, lubrication.
Drivetrain:
Final drive, chain adjustment, rear axle, bearings.
Suspension:
Front and rear suspension systems, shocks, springs, control arms, adjustment, rebuilding.
Brakes:
Hydraulic brake system (front and rear discs), master cylinders, calipers, brake lines, bleeding, pads, rotors.
Steering:
Steering system, tie rods, ball joints, bearings, steering knuckle.
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter, ECU, sensors, troubleshooting.
Body Chassis:
Frame, body panels, plastics, seat, handlebars, footpegs, installation, removal.
Cooling System:
Radiator, fan, coolant, hoses, thermostat.
Routine Maintenance:
Oil change, filter replacement, air filter cleaning, spark plug inspection/replacement, chain adjustment, lubrication points.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon faults.
Overhaul Procedures:
Complete engine rebuild, transmission disassembly/reassembly, suspension component rebuilding.
Component Replacement:
Detailed steps for replacing major and minor components.
Adjustment:
Carburetor/throttle body synchronization, clutch, brakes, suspension settings.
Wiring Diagrams:
Detailed electrical schematics for all systems.
Diagnostic Capabilities:
Advanced diagnostic procedures, error code interpretation, sensor testing.
Rebuild Scope:
Comprehensive rebuild procedures for all major mechanical components.
Torque Specifications:
Detailed torque values for all fasteners.
Clearances Tolerances:
Specific measurements for valve lash, bearing clearances, and other critical tolerances.
Special Tools:
Identification and usage of Yamaha-specific or required tools.
Engine Type:
4-stroke, liquid-cooled, DOHC, 4-valve
Bore X Stroke:
100.0 mm x 83.9 mm
Compression Ratio:
9.2:1 (typically)
Horsepower:
Estimated 45-50+ HP (at the crank, stock, varies by market/tune).
Torque:
Estimated 40-45 lb-ft (at the crank, stock).
Fuel Delivery:
Electronic Fuel Injection (EFI) with 44mm throttle body.
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended).
Oil Type:
Yamalube 4 (or equivalent) 10W-40 or 20W-50 API SG, SF, or SG-type motorcycle oil.
Oil Capacity:
Approximately 2.0 L (2.1 US qt) with filter change.
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first. More frequently under severe use.
Air Filter Cleaning:
Every 1000 km (600 miles). Clean more often in dusty conditions.
Spark Plug Inspection:
Every 1000 km (600 miles).
Chain Maintenance:
Inspect and lubricate every 500 km (300 miles) or as needed. Adjust tension as per manual specifications.
Engine Oil:
Yamalube 4 (or equivalent) 10W-40 or 20W-50 API SG, SF, or SG-type motorcycle oil.
Coolant:
Permanent type antifreeze coolant with a 50% mixture of ethylene glycol and distilled water.
Common Wear Items:
Brake pads, chain and sprockets, tires, wheel bearings, ball joints due to high-performance use.
Efi Tuning:
While reliable, advanced tuning of the EFI system might be a consideration for optimal performance from various aftermarket modifications, which this manual would cover.