Market Segment:
Mid-size utility ATV, popular for recreational and light-duty farm use.
Competitors:
Honda TRX300EX/350, Suzuki LT-F300 King Quad, Kawasaki Bayou 300
Key Features:
Reliable 348cc air-cooled engine, selectable 2WD/4WD (on some variants), comfortable suspension, versatile for various terrains.
Utility Focus:
Designed for a balance of recreational riding and utility tasks, featuring a comfortable riding position and reliable power delivery.
Manual Benefit:
Enables owners to perform maintenance and repairs themselves, saving on labor costs and extending the vehicle's lifespan.
Manual Type:
Factory Service Repair Manual
Format:
PDF (Portable Document Format)
Compatibility:
WINDOWS and MAC
Requirements:
Adobe PDF Reader
Delivery Method:
Instant PDF download after purchase.
Estimated Page Count:
The product description does not specify an exact page count. Factory service manuals for this era and complexity typically range from 200 to 500+ pages.
Systems Covered:
General Information, Specifications, Periodic Inspection and Adjustment, Chassis, Engine Overhaul, Carburetion, Electrical, Troubleshooting
Chassis Systems:
Frame, suspension (front and rear), steering, wheels, tires, brakes, drivetrain (shaft drive, differentials).
Engine Systems:
Top end (cylinder head, valves), bottom end (crankshaft, connecting rod), lubrication system, cooling system, starting system, fuel system (carburetor).
Electrical Systems:
Ignition system (CDI), charging system (stator, regulator/rectifier), lighting system, battery, wiring diagrams, troubleshooting electrical faults.
Procedures Included:
Maintenance schedules, repair procedures, diagnostic troubleshooting, component overhaul, adjustments, system analysis
Engine Rebuild Procedures:
Detailed instructions for complete engine disassembly, inspection, overhaul, and reassembly, including valve adjustments and piston/cylinder replacement.
Carburetor Overhaul Procedures:
Comprehensive steps for carburetor disassembly, cleaning, inspection, reassembly, and adjustment of mixture and idle speed.
Troubleshooting Guides:
Systematic diagnostic procedures for common problems, including starting issues, poor performance, electrical faults, and drivetrain problems.
Technical Depth:
Comprehensive factory-level repair and maintenance information for all major systems.
Diagnostic Tools:
While not specific to electronic diagnostic tools, the manual details troubleshooting based on symptoms and component testing via multimeters and visual inspection.
Engine Type:
4-stroke, SOHC, air-cooled
Bore X Stroke:
83 mm x 64.5 mm
Horsepower:
Approximately 22 HP (manufacturer specific data may vary slightly)
Torque:
Approximately 20 lb-ft (manufacturer specific data may vary slightly)
Engine Cooling:
Fins on cylinder and cylinder head facilitate air flow for cooling.
Fuel Delivery:
Carburetor (likely Mikuni BSR33)
Carburetor Model:
Mikuni BSR33 (common for this model)
Fuel Type:
Unleaded gasoline (minimum octane rating as specified in the manual, typically 87).
Ignition System:
CDI (Capacitor Discharge Ignition)
Cooling Method:
Air-cooled
Safety Standards:
Adheres to applicable ATV safety regulations for its class and year.
Braking System:
Hydraulic disc brakes, front and rear.
Lighting:
Dual 30W headlights, 5W brake light.
Tires:
AT-specific knobby tires for traction.
Infotainment System:
Not applicable for this model; basic instrumentation (speedometer, odometer, fuel gauge, warning lights).
Driver Assistance Features:
None (as expected for a 2004 utility ATV).
Connectivity Features:
Not applicable.
Oil Change Interval:
Refer to manual for specific mileage/hours; typically every 1000 miles or annually.
Air Filter Cleaning:
Check and clean every 500 miles or more frequently in dusty conditions.
Spark Plug Replacement:
Refer to manual, typically around 2000-3000 miles.
Brake Fluid Flush:
Recommended every 2 years or as needed, consult manual.
Engine Oil Type:
Yamaha recommends Yamalube 4 (10W-40) or equivalent SAE 10W-40 API SG or higher.
Engine Oil Capacity:
Refer to manual; typically around 1.7-1.9 US qt (1.6-1.8 L) with filter change.
Gear Oil Type:
Refer to manual for specific grade, often SAE 80W-90 hypoid gear oil.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Coolant Type:
Not applicable; this model is air-cooled.
Common Wear Items:
CVT belt wear, carburetor jetting issues (clogging), suspension bushings, brake component wear.
Carburetor Cleaning:
Regular cleaning and adjustment of the Mikuni BSR33 carburetor is often necessary due to fuel quality variations and potential for varnish buildup.
Transmission Belt Wear:
CVT belts require periodic inspection and replacement based on wear and mileage; premature wear can occur with aggressive riding or improper belt tension.
Brand Focus:
Yamaha has a long-standing reputation for producing reliable and performance-oriented powersports vehicles, including ATVs.
Wolverine Lineage:
The Wolverine line is known for its utility and comfort, positioned as a capable recreational and working ATV.
Manufacturing Location:
Primarily manufactured in Japan and/or the USA by Yamaha Motor Corporation.
