Market Segment:
High-performance sport ATV.
Target Audience:
Enthusiasts, recreational riders, and racers seeking peak performance and aggressive styling.
Key Competitors:
Honda TRX450R, Suzuki LT-R450, Kawasaki KFX450R.
Competitive Advantage:
Larger displacement engine (686cc) providing higher torque and horsepower compared to many 450cc competitors.
Engine Type:
Powerful 686cc liquid-cooled, DOHC, four-stroke engine.
Fuel Delivery:
Electronic Fuel Injection (EFI) for precise fuel metering, improved throttle response, and easier starting.
Transmission:
5-speed manual with reverse for versatile control.
Suspension:
Long-travel, fully adjustable independent front suspension and independent rear suspension for superior handling and comfort.
Braking:
Powerful hydraulic disc brakes front and rear.
Ergonomics:
Aggressive styling with a low center of gravity and rider-focused cockpit.
Engine System:
Complete engine disassembly, assembly, inspection, repair, troubleshooting for the 686cc liquid-cooled, DOHC, 4-valve, four-stroke engine.
Fuel System:
Fuel injection system diagnostics, components (throttle body, injectors, fuel pump, regulator), pressure testing, cleaning, and adjustments.
Cooling System:
Radiator, fan, thermostat, coolant flow, bleeding procedures, and component testing.
Exhaust System:
Muffler, headpipe, heat shields, and emissions-related components.
Transmission System:
5-speed manual transmission with reverse, clutch operation, gear inspection, lubrication, and potential repairs.
Drivetrain System:
Shaft drive, final drive inspection, lubrication, seals, and potential maintenance.
Suspension System:
Front and rear suspension, shock absorbers (adjustable), springs, linkage, bearings, adjustment procedures, and maintenance.
Braking System:
Front dual hydraulic disc brakes, rear hydraulic disc brake, hydraulic lines, master cylinders, calipers, pad replacement, fluid type, bleeding, and troubleshooting.
Electrical System:
Battery, charging system (stator, regulator/rectifier), ignition system (CDI, spark plug), lighting, starter motor, wiring diagrams, and troubleshooting.
Chassis And Frame:
Frame inspection, steering system (handlebar, steering stem, bearings), swingarm, sub-frame, and related components.
Wheels And Tires:
Tire pressures, rim specifications, wheel bearings, and tire replacement guidelines.
Bodywork And Plastics:
Fender removal, seat installation/removal, panel fasteners, and general care.
Troubleshooting Guides:
Systematic diagnostic procedures for common and uncommon problems, fault codes (if applicable via diagnostic tools).
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, chain adjustment (if applicable), brake pad checks, fluid level checks, air filter cleaning/replacement.
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement, electrical system diagnostics and repair.
Component Disassembly Assembly:
Detailed step-by-step instructions for removing, inspecting, repairing, and reinstalling all major components.
Specifications Data:
Torque specifications, clearances, fluid capacities, electrical values, and other critical measurements.
Wiring Diagrams:
Comprehensive electrical schematics for all systems, aiding in troubleshooting and repair.
Special Tools:
Identification of specialized tools required for specific maintenance and repair tasks.
Depth Of Coverage:
Comprehensive: Covers everything from basic owner maintenance to complete engine and transmission rebuilds, including advanced electrical diagnostics.
Engine Type:
Liquid-cooled, DOHC, 4-stroke, 4-valve
Bore X Stroke:
100.0 mm x 83.9 mm
Carburetion:
Not Applicable (EFI)
Horsepower:
Estimated 50-55 HP at crank (manufacturer data not always published directly for ATVs, based on reputable sources and comparisons).
Torque:
Estimated 40-45 ft-lbs at crank (similar estimation as horsepower).
Fuel Injection Type:
Mikuni 44mm throttle body with EFI
Fuel Type:
Unleaded gasoline, 87 octane minimum
Oil Type:
Yamalube 4T or equivalent SAE 10W-40 API SG, SJ, SL or higher
Oil Capacity With Filter:
3.56 US qt (3.37 L)
Engine Oil Change Interval:
Every 1000 km (600 miles) or 6 months, whichever comes first, or more frequently under severe use.
Air Filter Cleaning Interval:
Every 1000 km (600 miles) or every 3 months, or more frequently in dusty conditions.
Spark Plug Check Interval:
Every 1000 km (600 miles) or every 6 months.
Clutch Free Play Adjustment:
Check and adjust every 1000 km (600 miles).
Brake Fluid Change Interval:
Every 2 years or as needed based on inspection.
Engine Oil Specification:
Yamalube 4T, SAE 10W-40, API SG, SJ, SL or higher.
Coolant Specification:
Mixture of permanent type anti-freeze and water (50:50 ratio) recommended.
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid.
Final Drive Oil Specification:
Yamalube 10W-40, API SG or equivalent (same as transmission).
Common Wear Items:
Front wheel bearings, rear brake pads, swingarm bearings, and steering stem bearings due to stress and usage.
Potential Efi Issues:
In rare cases, early EFI systems could be sensitive to fuel quality or contamination, leading to rough running; typically addressable with proper maintenance and cleaning.
Suspension Tuning:
Many owners modify suspension settings for different riding styles or terrains; the manual provides guidance on adjustments.
Brand Focus:
Yamaha Motor Company is renowned for its high-performance motorcycles, ATVs, watercraft, and musical instruments, with a strong emphasis on engineering and innovation.
Predecessor:
Yamaha Raptor 660R (YFM660R).
Key Changes From 660R:
Introduction of the larger 686cc engine, electronic fuel injection (EFI), electric start, and a redesigned chassis for improved handling and performance.
Design Philosophy:
To create the ultimate sport ATV by leveraging Yamaha's advanced engine technology and chassis design expertise.
Manufacturing Location:
Taiwan (typically for Yamaha's ATV production during this period).
Production Period:
2006-present (with updates to newer generations).