Product Category:
Powersports Parts and Service Information
Target Audience:
Owners, DIY mechanics, repair shops, parts suppliers of 1998 Yamaha Timberwolf 4WD YFB250FWK.
Value Proposition:
Provides direct access to OEM part numbers and diagrams, enabling cost savings compared to dealer-purchased parts lists and facilitating accurate DIY repairs.
Manual Features:
Illustrated exploded parts diagrams, comprehensive part number listings, clear descriptions, instant download.
Engine Components:
Cylinder head, cylinder block, crankshaft, pistons, connecting rods, camshafts, valves, timing components, oil pump, oil filter housing, cooling system components (radiator, thermostat, water pump), exhaust system components.
Fuel System Components:
Carburetor (Mikuni VM series typically), fuel tank, fuel pump, fuel lines, fuel filter, air filter assembly, intake manifold.
Transmission Components:
Gearbox assembly, input/output shafts, gears, shift forks, clutch components, drive shafts, differential components (front and rear).
Drivetrain Components:
CV joints, propeller shafts, final drive assemblies, axle shafts, hub assemblies.
Suspension Components:
Front A-arms, shocks/struts, steering knuckles, tie rods, ball joints, rear swingarm, shock absorbers, bushings.
Braking System Components:
Front brake calipers, brake discs, brake pads, master cylinder, brake lines, rear brake drums, brake shoes, parking brake mechanism.
Electrical System Components:
Ignition system components (spark plug, coil, CDI unit), stator, flywheel, starter motor, battery, headlight, taillight, wiring harnesses, switches, fuses.
Body And Frame Components:
Frame, front fender, rear fender, plastic body panels, handlebars, seat assembly, racks (front and rear), skid plates.
Controls And Indicators:
Throttle assembly, brake levers, shift lever, lighting controls, dashboard instruments (speedometer, odometer, indicator lights), control cables.
Part Identification:
Detailed exploded views for easy identification of all components and sub-assemblies.
Part Number Lookup:
Comprehensive listing of all genuine Yamaha part numbers for ordering and replacement.
Assembly Disassembly Guidance:
Illustrations facilitate understanding of component relationships for disassembly and reassembly processes.
Technical Detail Level:
Focuses on part identification and cataloging, providing the necessary information to order correct replacement parts.
Oil Change Interval:
Typically every 100 hours or 6 months (refer to specific owner's manual for exact OEM recommendations).
Air Filter Cleaning:
Every 20 hours or as needed in dusty conditions.
Spark Plug Replacement:
Typically every 2,500 miles or annually.
Engine Oil Type:
Yamalube 4W (or equivalent SAE 10W-30 API SG or higher).
Engine Oil Capacity:
Approx. 1.9 US qt (1.8 L) with filter change.
Gear Oil Type:
Yamalube Gear Oil (or equivalent SAE 80W API GL-4).
Brake Fluid Type:
DOT 3 hydraulic brake fluid.
Common Wear Items:
Brake pads, tie rod ends, wheel bearings, carburetor jets (clogging), swingarm bushings.
Carburetor Maintenance:
Regular cleaning and adjustment of the Mikuni carburetor is often necessary for optimal performance due to fuel variability and potential for debris.
4Wd Engagement Issues:
Potential issues with front differential engagement or CV joint wear over time, requiring inspection and replacement of specific parts.
Yamaha Powersports History:
Yamaha Motor Company is a Japanese manufacturer with a long-standing reputation for quality and innovation in motorcycles, ATVs, watercraft, and marine engines since its founding in 1955.
Timberwolf Lineage:
The Timberwolf was Yamaha's entry into the utility/recreational ATV market, known for its reliable 4-stroke engine and 4WD capability, preceding models like the Wolverine and Grizzly.
Model Production Years:
1992-1998 (approximate, with various sub-models).
