Vehicle Type:
All-Terrain Vehicle (ATV)
Target Audience:
Recreational riders, utility users, and mechanics focused on performance and reliability in off-road conditions.
Competitors:
Honda FourTrax, Suzuki QuadRunner, Kawasaki Bayou (during its production era)
Vehicle Focus:
Versatility, durability, and user-friendly operation for moderate off-road trails and utility tasks.
Primary Coverage:
Factory Service Repair Manual
Secondary Coverage:
Maintenance, Repair, Rebuild, Refurbish, Restoration
Estimated Pages:
Approximately 300-500 (Typical for comprehensive factory manuals of this era)
Type:
Service Manual / Repair Manual
Engine Mechanical:
Complete engine teardown, assembly, timing, valve adjustments, piston/cylinder inspection and replacement.
Fuel System:
Carburetor diagnosis and adjustment, fuel pump, fuel lines, fuel filter service.
Ignition System:
CDI unit, ignition coil, spark plug specifications, testing and replacement.
Cooling System:
Radiator, coolant, fan operation, thermostat service (if applicable).
Transmission Drivetrain:
Automatic transmission (CVT) operation, clutch inspection, belt replacement, gear case lubrication and service.
Suspension:
Front and rear suspension components, shock absorber servicing, bushings, ball joint inspection.
Brakes:
Hydraulic brake system, master cylinder, brake calipers, brake pads, brake fluid specifications, bleeding procedures.
Steering:
Steering mechanism, tie rod ends, steering column adjustment, lubrication.
Electrical System:
Wiring diagrams, battery specifications, charging system (stator, regulator/rectifier), lighting, starter motor, switches.
Frame Chassis:
Frame inspection, component mounting, body panel removal and installation.
Wheels Tires:
Tire pressure recommendations, wheel bearing maintenance, rim specifications.
Maintenance:
Routine checks, oil changes, filter replacements, lubrication points, valve clearance adjustments.
Troubleshooting:
Diagnostic charts for common problems, symptoms, and potential causes across all systems.
Repair:
Step-by-step instructions for component removal, repair, and reinstallation with torque specifications.
Rebuild:
Detailed procedures for rebuilding major components like the engine and transmission.
Depth:
Comprehensive from basic preventative maintenance to in-depth engine and transmission overhauls. Includes diagnostic procedures and specifications.
Digital Format:
PDF (Portable Document Format)
Digital Quality:
High-resolution, typically scanned from original factory documentation. Searchable text functionality may vary.
Binding:
Not Applicable (Downloadable PDF)
Paper Quality:
Not Applicable (Downloadable PDF)
Engine Type:
4-Stroke, SOHC, Air-Cooled
Bore X Stroke:
83.0 mm x 64.5 mm
Power Output Estimation:
Approx. 21-24 HP (Specific factory figures not always published for ATVs)
Torque Estimation:
Approx. 20-23 lb-ft (Specific factory figures not always published for ATVs)
Carburetor Type:
Mikuni BSR33, 33mm, Flat Slide, with Accelerator Pump
Fuel Type:
Unleaded gasoline (Regular octane)
Ignition System:
CDI (Capacitor Discharge Ignition)
Oil Type:
Yamalube 4 (or equivalent API SG or higher, SAE 10W-40, 20W-40, or 20W-50 depending on temperature)
Oil Capacity:
1.90 L (2.0 US qt) with oil filter change
Transmission Type:
Automatic (Yamaha Constant Velocity Transmission - YCC-T)
Drive Type:
2WD (Shaft Drive)
Gear Reduction Ratio:
Refer to manual for specific ratios (typical for YFM 350 series)
Clutch Type:
Wet, centrifugal type
Gear Selection:
Forward, Neutral, Reverse
Gear Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 hypoid gear oil)
Gear Oil Capacity:
0.15 L (0.16 US qt)
Safety Certification:
ANSI/SVIA 1-2001 (Standard for Four Wheel All-Terrain Vehicle) compliance
Braking System:
Hydraulic disc brakes front and rear, with self-adjusting parking brake.
Throttle Limiter:
Thumb throttle with a trigger design for controlled acceleration.
Lighting:
Dual 30W headlights, 5W brake light.
Tires:
AT-specific knobby tires for traction and stability.
Handlebar Design:
Ergonomic handlebar with padded crossbar for grip and impact absorption.
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first. Check more frequently under severe use.
Air Filter Cleaning:
Every 500 km (300 miles) or 3 months. Clean more frequently in dusty conditions.
Spark Plug Inspection:
Every 1000 km (600 miles) or 6 months. Replace as needed based on condition.
Valve Clearance Check:
Every 4000 km (2500 miles) or 24 months.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Coolant Type:
Ethylene glycol-based antifreeze, 50% mixture with distilled water.
Carburetor Performance:
Carburetors can sometimes require adjustments or cleaning due to fuel quality or age, affecting idle and acceleration.
Cvt Belt Wear:
The CVT drive belt can wear over time, especially with aggressive riding, leading to performance loss or failure. Regular inspection is key.
Suspension Bushings:
Rubber bushings in the suspension and A-arms can degrade and crack over time, leading to play and potential alignment issues.
Torque Wrench:
Essential for ensuring fasteners are tightened to factory specifications, preventing damage or component failure.
Feeler Gauges:
Required for accurate valve clearance adjustments.
Manufacturer Focus:
Yamaha has a long-standing reputation for building reliable and performance-oriented powersports vehicles, including motorcycles and ATVs.
Wolverine Lineage:
The Wolverine series is known for its balance of trail capability and utility, evolving from earlier Yamaha utility ATV models.
Production Period:
The YFM350 Wolverine was produced for several years, with the 2002 model representing a refined version of its platform.
