Segment:
Recreational ATV, positioned as a versatile utility and trail riding machine.
Target Audience:
Enthusiasts, farmers, hunters, and recreational riders seeking a reliable and capable 4x4 ATV.
Key Competitors:
Honda FourTrax series, Suzuki King Quad, Kawasaki Bayou, Polaris Sportsman.
Differentiating Features:
Known for its ruggedness, reliable shaft drive, and comfortable ride for its class and era. The 350cc engine offered a good balance of power and fuel efficiency.
Manual Benefit:
Empowers owners and technicians with the official factory information to perform all necessary maintenance and repairs, ensuring optimal performance and longevity.
Primary Coverage:
Comprehensive repair, maintenance, disassembly, assembly, and troubleshooting for the 1999 Yamaha Wolverine 350.
Secondary Coverage:
Includes adjustments, checks, and detailed explanations of procedures.
Page Count Estimated:
Typically 300-500 pages for a factory service manual of this era, exact count not specified.
Manual Type:
Factory Service Repair Manual
Engine:
Detailed coverage of the 348cc single-cylinder, air-cooled engine, including top-end and bottom-end rebuilds, valve adjustments, carburetor tuning, and cooling system diagnostics.
Transmission:
Covers the 5-speed manual transmission with reverse, including clutch operation, gear inspection, and shift mechanism.
Drivetrain:
Explains the shaft drive system, including U-joints, drive shafts, and final reduction gears.
Suspension:
Covers front independent suspension (double A-arm) and rear swingarm, including shock absorber adjustments, bushings, and ball joint service.
Brakes:
Details front and rear drum brake systems, including brake shoe replacement, adjustment, and hydraulic system bleeding (if applicable, though likely drum).
Electrical:
Comprehensive wiring diagrams, ignition system testing (CDI), lighting, charging system (stator, regulator/rectifier), and starter system diagnostics.
Fuel System:
Carburetor disassembly, cleaning, jetting, float adjustment, fuel pump (if applicable), and fuel line routing.
Cooling System:
Air-cooling fin cleaning and inspection.
Chassis And Body:
Frame inspection, handlebar and control lever replacement, seat removal, fender and body panel mounting.
Wheels And Tires:
Tire pressure recommendations, wheel bearing service, and lug nut torque specifications.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug replacement, air filter cleaning, chain adjustment (if applicable, though shaft drive), and general inspection points.
Repair:
Detailed step-by-step repair procedures for all major components, from engine overhauls to electrical system troubleshooting.
Disassembly Assembly:
Explicit instructions for removing and installing all parts and assemblies, including torque specifications.
Troubleshooting:
Diagnostic charts and symptom-based troubleshooting guides for common problems.
Adjustments:
Procedures for adjusting brakes, clutch, throttle cables, and carburetor settings.
Depth Level:
Factory-level diagnostics and repair, covering everything from routine maintenance to complete engine and transmission rebuilds.
Diagnostic Tools:
Specifies required tools and measuring instruments for accurate diagnostics and repairs.
Special Tools:
Lists any Yamaha-specific special tools required for certain procedures.
Engine Type:
4-stroke, SOHC, single-cylinder
Bore X Stroke:
80.0 mm x 69.5 mm (Typical for this engine family)
Cooling System:
Air-cooled
Compression Ratio:
8.7:1 (Typical)
Ignition System:
CDI (Capacitor Discharge Ignition)
Horsepower Estimated:
Approximately 18-20 HP (Specific figures not provided in description, but typical for class)
Torque Estimated:
Approximately 19-21 lb-ft (Specific figures not provided in description, but typical for class)
Carburetor Type:
Mikuni BS34 (Common for this model)
Fuel Type:
Unleaded gasoline, 87 octane or higher recommended
Transmission Type:
5-speed manual with Reverse
Optional Transmission:
N/A (Only manual transmission was offered)
Drive System:
Shaft Drive, 2WD (Front axle is solid, rear drive).
Clutch Type:
Wet, multi-plate, manual clutch
Gear Ratios:
Detailed ratios for each gear and reverse are provided within the manual.
Length:
Approx. 76.4 inches (1940 mm)
Width:
Approx. 43.7 inches (1110 mm)
Height:
Approx. 43.0 inches (1092 mm)
Wheelbase:
Approx. 49.2 inches (1250 mm)
Ground Clearance:
Approx. 7.1 inches (180 mm)
Dry Weight:
Approx. 470 lbs (213 kg)
Fuel Capacity:
Approx. 3.7 US gallons (14 Liters), including reserve
Safety Ratings:
ATVs are not subject to the same formal crash safety ratings as passenger cars. Operation requires adherence to safety guidelines in the manual and protective gear.
Throttle Limiter:
Adjustable throttle limiter for controlled acceleration (covered in manual).
Parking Brake:
Hand-operated parking brake.
Front Bumper:
Standard front brush guard.
Footwells:
Wide, composite footwells with heel guards for protection.
Handlebar Design:
Contoured handlebars for grip and control.
Engine Oil Change:
Every 100 hours or annually, whichever comes first (refer to manual for specific conditions).
Air Filter Cleaning:
Every 20 hours or as needed, especially in dusty conditions.
Spark Plug Replacement:
Inspect every 100 hours, replace as needed.
Valve Adjustment:
Every 100 hours or annually.
Engine Oil Type:
Yamaha Motorcycle Oil 10W-30 or Yamalube 4, SAE 10W-30 API SG or higher (check manual for exact spec).
Engine Oil Capacity:
Approx. 1.90 US quarts (1.8 Liters) with oil filter change.
Gear Oil Type:
Yamalube Gear Oil 80W-90 or equivalent GL-4 gear oil.
Brake Fluid Type:
DOT 3 or DOT 4 (if hydraulic components present, otherwise drum brake lubrication specified).
Common Wear Items:
Carburetor gumming due to fuel degradation if left sitting, worn brake shoes, aging suspension bushings, and potential starter clutch issues.
Preventative Maintenance:
Regular fuel stabilization, timely oil changes, and proper storage are key to preventing common issues.
Yamaha Atv Legacy:
Yamaha has been a pioneer in the ATV market since the introduction of the Tri-Moto in the early 1980s, known for innovation and durability.
Wolverine Lineage:
The Wolverine 350 (YFM350X) was part of Yamaha's popular line of mid-size ATVs, evolving from earlier models like the Moto-4. It served as a predecessor to later models incorporating more advanced features.
Production Period:
The Wolverine 350 model line spanned several years, with the 1999 model being a significant iteration in its development.
