Target Audience:
Recreational riders, farmers, hunters, trail riders
Competitors Era:
Honda FourTrax, Suzuki QuadRunner, Kawasaki Bayou
Atv Type:
4x2 (Rear-wheel drive) capable, with some models offering switchable 2WD/4WD capability (verify specific year/trim for 4WD)
Atv Strengths:
Reliability, ease of maintenance, good low-end torque for utility tasks, comfortable riding position.
Primary Coverage:
Full factory service and repair
Secondary Coverage:
Maintenance, diagnostics, troubleshooting, rebuilds, restorations
Type:
Factory Service Repair Manual
Engine:
Complete engine overhaul, diagnosis, and repair
Cooling System:
Radiator, fan, coolant flow, hoses, thermostat
Fuel System:
Carburetor assembly, tuning, fuel lines, fuel pump
Drivetrain:
Clutch, gearbox, drive shafts, differential, wheel hubs
Chassis:
Frame, suspension (front and rear), steering system, brakes (front and rear), wheels, tires
Electrical System:
Ignition system, lighting, charging system (stator, rectifier/regulator), battery, starter motor, wiring diagrams, switches, sensors
Bodywork:
Fender replacement, seat, body panels, plastics
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication, valve adjustments
Diagnostics:
Troubleshooting charts, symptom-based diagnosis, electrical testing procedures
Repair:
Component replacement, disassembly and reassembly of all major systems
Rebuild:
Detailed engine rebuild procedures, gearbox overhauls
Restoration:
Guidance on bringing a neglected ATV back to original specifications
Depth:
Comprehensive: Covers basic maintenance to complete engine and transmission rebuilds with detailed specifications.
Engine Type:
Four-stroke, SOHC, air-cooled
Bore X Stroke:
83.0 mm x 64.5 mm
Valve Clearance Intake:
0.06 - 0.10 mm (0.002 - 0.004 in)
Valve Clearance Exhaust:
0.09 - 0.13 mm (0.003 - 0.005 in)
Horsepower:
Approx. 18-20 HP (Varies by year and tuning)
Torque:
Not explicitly stated, but strong low-end torque is characteristic.
Carburetor Model:
Teikei Y28P (or similar Mikuni variant)
Fuel Type:
Unleaded gasoline, 87 octane minimum
Oil Type:
Yamalube 4 (or equivalent API SE, SF, SG, SH, SJ service classification) SAE 10W-30 or 20W-40 depending on temperature.
Oil Capacity With Filter:
2.10 L (2.22 US qt)
Ignition System:
CDI (Capacitor Discharge Ignition)
Cooling Method:
Air-cooled with fan assist
Transmission Type:
5-speed manual with automatic clutch and reverse
Transmission Options:
N/A (Standard configuration)
Clutch Type:
Wet, multi-plate automatic clutch
Final Drive:
O-ring sealed chain
Gear Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4) SAE 80W or 85W
Gear Oil Capacity:
0.65 L (0.69 US qt)
Overall Length:
Approx. 1900 mm (74.8 in)
Overall Width:
Approx. 1085 mm (42.7 in)
Overall Height:
Approx. 1050 mm (41.3 in)
Wheelbase:
Approx. 1230 mm (48.4 in)
Ground Clearance:
Approx. 155 mm (6.1 in)
Dry Weight:
Approx. 222 kg (489 lbs)
Curb Weight:
Approx. 230 kg (507 lbs)
Front Rack Capacity:
Not specified, but typically around 45 kg (100 lbs)
Rear Rack Capacity:
Not specified, but typically around 70 kg (150 lbs)
Towing Capacity:
Not specified for this model, generally not designed for heavy towing.
Safety Standards:
Designed to meet industry standards for ATVs of its era.
Braking System:
Front: Dual hydraulic disc brakes; Rear: Single hydraulic disc brake with parking brake mechanism.
Lighting:
Dual 30W headlights, 5W taillight/stoplight
Frame Construction:
Durable steel frame
Operator Controls:
Handlebar with thumb throttle and hand-operated brake levers.
Engine Oil Change:
Every 100 hours or annualy
Air Filter Cleaning:
Every 20 hours or more frequently in dusty conditions
Spark Plug Replacement:
Every 100 hours or annually
Valve Clearance Check:
Every 100 hours
Engine Oil Grade:
SAE 10W-30 or 20W-40 (temperature dependent)
Brake Fluid Type:
DOT 3 or DOT 4
Coolant Type:
Yamaha All Weather Biodegradable Coolant or equivalent ethylene glycol based coolant, 50/50 mix with distilled water.
Carburetor Gumming:
Can occur if fuel sits for extended periods without stabilizer, leading to starting issues or poor running.
Reverse Gear Wear:
In some cases, aggressive use or frequent reversing can lead to premature wear of reverse gear components.
Stator Failure:
Like many older ATVs, stator can fail over time, leading to charging system issues.
Carburetor Jetting:
May require adjustment for altitude changes or aftermarket exhaust/air filter modifications.
Brand History:
Yamaha Motor Company is a Japanese manufacturer of motorcycles, marine products, and other motorized products. Founded in 1955, Yamaha has a long-standing reputation for engineering excellence and performance.
Wolverine Lineage:
The Wolverine series, starting with models like the YFM350, established Yamaha's presence in the utility ATV market, focusing on ruggedness, reliability, and versatility.
Production Period:
Covered by this manual: 1995-2004. Continued production in various forms for many years.
Manufacturing Location:
Primarily Japan, with some production possibly in other Yamaha facilities.
