Target Audience:
Recreational riders, hunters, ranchers, and utility users seeking a mid-size, dependable utility ATV
Position:
Entry-to-mid-level utility ATV in Yamaha's 1994 lineup
Target Audience:
DIY owners and technicians servicing used Timberwolf units
Key Advantage:
Compact 250cc four-stroke engine with simple, durable construction and easy maintenance access
Advantage:
Yamaha build quality and wide dealer/parts support network
Engine:
Air-cooled 230cc four-stroke single
Transmission:
Automatic clutch with 5-speed forward and reverse
Drivetrain:
2WD (YFB250) or shaft-driven 4WD variant (YFB250FW)
Design:
Lightweight, nimble chassis suited to trails and light utility work
Manual Type:
Official Yamaha OEM Parts Catalog
Intended Users:
Dealers, technicians, and owners identifying replacement parts
Delivery Method:
Instant digital download
Compatibility:
Printable and viewable on PC, tablet, and smartphone
Contents:
Exploded component diagrams with factory part numbers for ordering
Organization:
Chapters grouped by system following Yamaha factory catalog structure
Engine:
Cylinder head, cylinder, piston, crankshaft, and camshaft assemblies
Intake and Fuel:
Carburetor, air cleaner, throttle, and fuel tank components
Exhaust:
Exhaust pipe and muffler assemblies
Cooling:
Air-cooling shrouds and related hardware
Lubrication:
Oil pump and oil delivery components
Transmission:
Gearbox, shift cam, shift fork, and clutch assemblies
Drivetrain:
Primary shaft, drive shaft, and final drive components
Chassis:
Frame, front and rear suspension arms, and shock absorbers
Wheels and Brakes:
Wheels, hubs, brake drums, brake shoes, and cables
Steering:
Handlebar, steering shaft, and knuckle components
Electrical:
CDI ignition, magneto, starter, wiring harness, and lighting
Body:
Fenders, seat, rack, decals, and covers
Fasteners:
Bolts, nuts, washers, and general hardware
Diagrams:
Exploded views of every assembly
Part Numbers:
Factory OEM part numbers for each component
Quantities:
Per-unit quantities required for each assembly
Revisions:
Factory supersessions and specification notes where applicable
Depth:
Component-level parts identification down to individual bolts and seals
Coverage Areas:
Complete machine, front bumper to rear carrier
Not Included:
This is a parts catalog, not a service/repair manual with torque specs or procedures
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Type:
Air-cooled 4-stroke SOHC single cylinder
Displacement:
Approximately 230cc
Starting System:
Electric start with recoil backup
Fuel Delivery:
Mikuni slide-type carburetor
Fuel Type:
Regular unleaded gasoline
Fuel Capacity:
N/A - confirm in owner's manual or service manual
Horsepower:
N/A - not stated in a parts catalog
Torque:
N/A - not stated in a parts catalog
Wheelbase:
N/A - refer to service or owner's manual
Overall Length:
N/A - refer to service or owner's manual
Tire Sizes:
N/A - not specified in the parts catalog
Curb Weight:
N/A - refer to service or owner's manual
Payload:
N/A - refer to rack capacity labels on the unit
Brakes:
Sealed dual drum brakes front and rear
Parking Brake:
Mechanical parking brake lock
Lighting:
Headlight and taillight for visibility
Guards:
Footpegs and heat shields on exhaust
Crash Test Ratings:
N/A - ATVs are not crash tested by NHTSA
Operation:
Ride within rated limits; wear a helmet and protective gear
Training:
Complete an approved ATV safety course before operation
Electrical and Instrumentation
Ignition:
CDI (capacitor discharge ignition)
Starting:
Electric starter with auxiliary recoil pull-start
Instrumentation:
Speedometer with integrated warning indicators
Lighting:
12-volt headlight and taillight system
Driver Assistance / Infotainment
Infotainment:
N/A - 1994 utility ATV, no audio or display systems
Driver Assistance:
N/A - not equipped on this model
Engine Oil:
Change every 100 hours or annually, whichever comes first
Air Filter:
Inspect and clean frequently; replace when saturated
Valve Clearance:
Check periodically per service manual schedule
Drive System:
Inspect shaft drive and grease fittings at regular intervals
Engine Oil:
Yamalube 4-stroke oil or equivalent API SE/SF 10W-30
Gear Oil:
SAE 80 API GL-4 hypoid gear oil
Grease:
Waterproof lithium-soap grease for chassis fittings
Brake Shoes:
Frequent replacement item on drum brake ATVs
Cables:
Throttle and brake cables wear and require lubrication or replacement
Carburetor:
Jets and diaphragm service needed after storage or ethanol fuel use
Air Filter:
Foam element degrades with dusty use
Manufacturer:
Yamaha Motor Company, Japan
Heritage:
Yamaha built its ATV reputation on durable four-stroke utility machines since the 1980s
Introduction:
Timberwolf (YFB250) introduced for the 1992 model year
1994 Updates:
Offered in 2WD and 4WD (YFB250FW) versions
Later Years:
Produced through the late 1990s before being replaced by newer utility models
Production Location:
Yamaha Motor Company manufacturing facilities in Japan
