Category:
Entry-level to mid-range sport/utility ATV.
Target Audience:
Recreational riders, light utility use, trail riding.
Key Competitors:
Honda TRX300EX/FourTrax, Suzuki LT-Z400 (later models), Kawasaki Bayou 300.
Design Philosophy:
Reliability, ease of maintenance, user-friendly operation, sporty yet capable for its class.
Model Identity:
The Wolverine was known for its robust engine and comfortable ride for its era, often favored by riders looking for a dependable trail machine.
Engine Mechanical:
Complete engine disassembly, inspection, repair, and reassembly (cylinder head, piston, crankshaft, connecting rod, valve train, timing system, lubrication system, cooling system).
Fuel System:
Carburetor (Mikuni VM series typically) overhaul, adjustment, troubleshooting, fuel tank, fuel pump, fuel lines.
Ignition System:
CDI unit, ignition coil, spark plug, stator, troubleshooting, timing specifications.
Transmission Drivetrain:
5-speed manual transmission with reverse, clutch operation and adjustment, final drive, driveshaft, differential (if applicable).
Chassis Frame:
Frame inspection, repair, and straightening procedures, front and rear suspension geometry, shock absorber specifications, swingarm, linkage.
Steering:
Handlebar assembly, steering stem, bearings, tie rods, troubleshooting steering play.
Braking System:
Hydraulic front disc brakes, rear drum or disc brakes (model dependent), brake caliper overhaul, master cylinder, brake lines, bleeding procedures, specifications.
Electrical System:
Wiring diagrams, lighting system (headlight, taillight, brake light), battery, starter motor, charging system (stator, regulator/rectifier), fuses, switches, indicators.
Body Panels Trim:
Removal and installation of fenders, plastics, seat, fuel tank cover, handlebars, controls.
Wheels Tires:
Wheel bearing maintenance, tire pressure specifications, rim specifications.
Preventive Maintenance:
Regularly scheduled maintenance, lubrication points, filter replacement intervals, spark plug replacement, valve clearance checks.
Troubleshooting:
Diagnostic flowcharts and symptom-based troubleshooting for common issues with engine performance, electrical systems, and drivetrain.
Repair Procedures:
Step-by-step instructions for component replacement, overhaul, and repair across all major systems.
Adjustment Calibration:
Carburetor tuning, clutch adjustment, brake lever free play, throttle cable adjustment.
Torque Specifications:
Precise torque values for critical fasteners (engine bolts, suspension components, wheel hubs).
Wiring Diagrams:
Detailed electrical schematics for easy diagnosis and repair of electrical faults.
Depth Level:
Comprehensive: Covers everything from basic fluid changes and inspections to full engine rebuilds, transmission overhauls, and electrical system diagnostics.
Diagnostic Capabilities:
Advanced diagnostic procedures, including electrical testing with multimeters, compression testing, and detailed troubleshooting trees.
Engine Type:
4-stroke, SOHC, air-cooled
Bore X Stroke:
83.0 mm x 64.5 mm
Horsepower Estimate:
Approximately 20-25 HP (typical for the class and engine size)
Torque Estimate:
Approximately 20-25 lb-ft (typical for the class and engine size)
Maximum Power Output:
Refer to specific model year specifications within the manual for precise figures.
Maximum Torque Output:
Refer to specific model year specifications within the manual for precise figures.
Carburetor Model:
Mikuni VM34SS (typical)
Fuel Type:
Unleaded gasoline, minimum octane rating 87.
Fuel Tank Capacity:
Approximately 3.2 gallons (12.1 Liters)
Length:
Approximately 70.1 inches (1780 mm)
Width:
Approximately 40.2 inches (1020 mm)
Height:
Approximately 42.9 inches (1090 mm)
Wheelbase:
Approximately 49.0 inches (1245 mm)
Dry Weight:
Approximately 463 lbs (210 kg)
Curb Weight:
Not typically specified, but would include fluids and battery.
Ground Clearance:
Approximately 4.7 inches (120 mm)
Front Rack Capacity:
Approximately 20 lbs (9 kg)
Rear Rack Capacity:
Approximately 40 lbs (18 kg)
Oil Change:
Every 100 hours or annually, whichever comes first (refer to manual for exact intervals).
Air Filter Cleaning:
Every 20 hours or as needed based on operating conditions.
Spark Plug Check Replacement:
Every 100 hours or annually.
Valve Clearance Check:
Every 200 hours or annually.
Engine Oil Type:
Yamaha Lube 10W-40 or equivalent API SG or higher, JASO MA certified (refer to manual for precise specifications).
Engine Oil Capacity:
Approximately 1.7 liters (1.8 US qt) with filter change.
Transmission Oil Type:
Yamalube SAE 80W Hypoid Gear Oil or equivalent (refer to manual for precise specifications).
Transmission Oil Capacity:
Approximately 0.5 liters (0.5 US qt).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (refer to manual for specific type).
Common Wear Items:
Clutch plates, wheel bearings, brake pads/shoes, tie rod ends, carburetor jets due to fuel quality.
Carburetor Cleaning:
Periodic cleaning and adjustment of the Mikuni carburetor is often necessary to maintain optimal performance, especially if left sitting with fuel.
Suspension Wear:
Front A-arm bushings and rear shock absorber may show wear over time, affecting handling.
Manufacturer:
Yamaha Motor Corporation.
Company Focus:
Renowned for innovation in motorcycles, marine engines, and powersports vehicles.
Wolverine Lineage:
The YFM350EX Wolverine was part of Yamaha's expanding ATV lineup, offering a balance of performance and utility.
Predecessors Successors:
Followed models like the Warrior 350 and preceded later models like the Wolverine 350 (with different engine/suspension configurations) and the YFZ450.
Manufacturing Location:
Typically manufactured in Japan or the United States by Yamaha.
Sales Performance:
The Wolverine 350 was a popular and successful model in its segment during its production run.
