Category:
Sport Utility Vehicle (ATV) - Recreational/Utility Crossover
Target Audience:
Recreational riders, light utility work, trail riding
Competitors:
Honda FourTrax 300/350, Suzuki QuadRunner 300/350, Kawasaki Bayou 300/360
Design:
Compact, agile, user-friendly for its time, often featuring a more approachable riding experience compared to larger utility ATVs.
Engine Configuration:
Air-cooled, single-cylinder, 4-stroke, SOHC engine providing reliable power for its class.
Primary Coverage:
Repair, Maintenance, Troubleshooting, Disassembly, Assembly, Adjustment
Secondary Coverage:
Installation procedures, Checks, Specifications
Estimated Page Count:
Likely 300-500 pages (typical for a comprehensive factory service manual of this era)
Type:
Factory Service Repair Manual
Engine:
Complete engine overhaul, cylinder head, piston, crankshaft, valve train, lubrication system, cooling system, carburetor, exhaust system
Transmission:
Clutch system (automatic), gearbox disassembly and assembly, gear shifting mechanism, lubrication
Drivetrain:
Shaft drive, differential, axle assembly, wheel hubs
Suspension:
Front independent suspension (A-arms, shocks, springs), rear swingarm, shock absorber, linkage
Brakes:
Front disc brakes, rear drum brake (or disc depending on specific variant), hydraulic system, brake fluid specifications
Electrical:
Ignition system, starter motor, charging system (stator, regulator/rectifier), lighting, battery, wiring diagrams, fuses, switches
Fuel:
Fuel tank, fuel lines, fuel pump (if applicable), carburetor adjustment and overhaul
Body:
Frame, body panels, fenders, seat, handlebars, controls, plastics
Maintenance:
Oil changes, filter replacements, chain adjustment (if applicable), spark plug inspection/replacement, air filter cleaning/replacement, general lubrication
Troubleshooting:
Diagnostic flowcharts, common problems and solutions, error code interpretation (if applicable)
Repair:
Component-level repair, component replacement, assembly and disassembly of all major systems
Specifications:
Torque values, clearances, fluid capacities, electrical specifications, engine tuning parameters
Depth:
Comprehensive; suitable for advanced DIY mechanics and professional technicians. Covers detailed disassembly, reassembly, and calibration.
Engine Type:
4-stroke, SOHC, Air-cooled
Bore X Stroke:
Approx. 83mm x 64.5mm (verify with manual for exact spec)
Compression Ratio:
Approximately 9.2:1 (verify with manual)
Horsepower:
Estimated 20-25 HP (at crankshaft, approximate)
Torque:
Estimated 20-24 lb-ft (at crankshaft, approximate)
Carburetor:
Mikuni BS32 or similar single carburetor (specific model number in manual)
Fuel Type:
Unleaded gasoline, 87 octane minimum
Fuel Tank Capacity:
Approx. 3.4 gallons (12.9 Liters) - verify with manual
Type:
Automatic with torque converter, 5-speed semi-automatic (Yamaha Constant-Velocity Automatic Transmission - CVAT)
Optional Transmission:
N/A for this model year and trim
Drive Selection:
2WD (Rear Wheel Drive), often with a locking differential or limited-slip function depending on specific sub-model/variant.
Transmission Fluid:
Yamaha genuine ATV gear oil or equivalent API GL-4, SAE 80W-90 (verify with manual for exact specification and capacity)
Length:
Approx. 74.6 inches (1895 mm) - verify with manual
Width:
Approx. 43.1 inches (1095 mm) - verify with manual
Height:
Approx. 43.7 inches (1110 mm) - verify with manual
Dry Weight:
Approx. 489 lbs (222 kg) - verify with manual
Ground Clearance:
Approx. 8.1 inches (205 mm) - verify with manual
Rack Capacity Front:
Approx. 45 kg (99 lbs) - verify with manual
Rack Capacity Rear:
Approx. 85 kg (187 lbs) - verify with manual
Wheelbase:
Approx. 49.2 inches (1250 mm) - verify with manual
Safety Certifications:
N/A (ATVs typically have different regulatory standards than passenger vehicles)
Braking System:
Hydraulic disc front, hydraulic drum/disc rear (check manual for exact configuration). Parking brake.
Throttle Limiter:
Potentially adjustable throttle stop screw (detailed in manual) for newer riders.
Lighting:
Halogen headlights, taillight/brake light.
Frame Construction:
Steel tube frame, designed for off-road durability.
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first (verify with manual)
Oil Filter Replacement:
At every engine oil change (if applicable, check manual for filter type)
Air Filter Cleaning:
Every 500 km (300 miles) or 3 months (clean and re-oil foam filter - verify with manual)
Spark Plug Check:
Every 1000 km (600 miles) or 6 months (replace as needed)
Engine Oil Type:
Yamaha Genuine 4-stroke engine oil or equivalent API SG, SAE 10W-40 (verify with manual for specific viscosity and API rating)
Engine Oil Capacity:
Approx. 1.8 Liters (1.9 US qt) without filter change, 2.0 Liters (2.1 US qt) with filter change (verify with manual)
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (verify with manual)
Carburetor Issues:
Clogged carburetors due to fuel varnish from sitting, idle speed instability, jetting issues with altitude/modification.
Electrical Issues:
Voltage regulator/rectifier failures, stator issues, battery drain due to age or faulty components.
Suspension Wear:
Worn bushings, shock absorber degradation, ball joint wear over time and heavy use.
Drive Component Wear:
U-joint wear in the driveshaft, differential seal leaks with age.
Brand:
Yamaha Corporation, a Japanese multinational conglomerate with extensive experience in motorcycles, musical instruments, and other products. Yamaha Motor Company is a subsidiary.
Predecessor:
Yamaha YFM350ER ('Big Bear' - often share engine components but different chassis/suspension)
Successor:
The Wolverine line evolved, with later models featuring liquid cooling, more advanced transmissions, and fuel injection. The YFM350 model designation itself was used for other variants of the 350cc engine.
Production Period:
The Wolverine 350, in various iterations, was produced from the mid-1990s through the early 2000s. The 2000 model year is a specific point in this evolution.
Manufacturing Location:
Likely Japan or USA (verify specific VIN range for manufacturing origin)
