Vehicle Segment:
Utility ATV (All-Terrain Vehicle)
Target Audience:
Recreational riders, utility users, farmers, hunters, property owners requiring a capable off-road vehicle.
Key Competitors:
Honda FourTrax, Suzuki QuadRunner, Kawasaki Bayou, Polaris Trail Boss.
Yamaha Advantage:
Yamaha's reputation for reliability, durability, and capable 4WD systems.
Manual Utility:
Facilitates cost-effective DIY repairs and maintenance by providing precise part identification and numbers.
Manual Benefit:
Empowers owners to bypass dealership pricing for parts.
Vehicle Highlight:
Robust 4WD system for enhanced traction in challenging terrain.
Vehicle Highlight 2:
Practicality and utility for various off-road tasks.
Overall Coverage:
Comprehensive parts identification and listing for the 1999 Yamaha Timberwolf 4WD (YFB250).
Key Sections:
Engine, drivetrain, chassis, suspension, brakes, electrical, body panels, accessories.
Estimated Pages:
Varies by specific digital edition, typically 100-250 pages for a comprehensive OEM parts manual.
Type:
OEM Parts Manual / Parts Catalog
File Format:
PDF (Portable Document Format)
Engine Assembly:
Cylinder head, cylinder block, crankshaft, piston, connecting rod, valve train, oil pump, cooling system components, exhaust system.
Drivetrain And Transmission:
Clutch assembly, gearbox components, drive shafts, differentials (front and rear), chain drive, sprockets.
Chassis And Frame:
Frame components, subframes, engine mounts, fuel tank, seat assembly, front and rear racks.
Suspension And Steering:
Front A-arms, shock absorbers, steering column, tie rods, steering knuckles, rear swingarm, shocks, linkage.
Braking System:
Front and rear brake calipers, brake discs/rotors, brake lines, master cylinders, brake levers/pedals.
Electrical System:
Wiring harness components, battery, starter motor, ignition system parts, lighting (headlight, taillight), switches, relays, CDI unit.
Bodywork And Plastics:
Fenders, plastics, body panels, trim pieces, bumpers, grab bars.
Wheels And Tires:
Wheels, tires, hub assemblies, lug nuts.
Disassembly Guidance:
Provides visual references via exploded diagrams to aid in correct part removal sequence.
Assembly Guidance:
Supports accurate reassembly by clearly illustrating component placement and relationships.
Part Identification:
Enables precise identification of all components and sub-assemblies.
Ordering Parts:
Lists OEM part numbers for accurate ordering from dealers or aftermarket suppliers.
Troubleshooting Support:
Indirectly supports troubleshooting by helping to identify missing or incorrect parts.
Depth:
High (comprehensive parts breakdown for all assemblies).
Focus:
Component identification and part number accuracy.
Scope:
Detailed listing of every individual part, fastener, and sub-assembly used in the vehicle.
Compatibility:
Compatible with all PC and MAC computers.
Reader Requirement:
Requires Adobe PDF Reader (free download available).
Printability:
Printable by the user on demand, page by page or in sections.
Resolution:
Typically high resolution for clear viewing of diagrams and text.
Digital Format:
Downloadable digital file (PDF).
Not Applicable:
N/A (digital product)
Engine Type:
Four-stroke, SOHC, air-cooled, single-cylinder.
Displacement:
230 cc (approximate)
Bore X Stroke:
Specifics vary, but typical for this class.
Compression Ratio:
Typical for its class, aimed at reliable power and fuel efficiency.
Horsepower:
Estimated 15-20 HP (manufacturer specific data not always published for ATVs).
Torque:
Designed for low-end torque for pulling and climbing.
Carburetion:
Mikuni carburetor (likely a VM or similar series, specific model number in manual).
Fuel Type:
Unleaded gasoline (Octane rating typically 87 or higher recommended).
Length:
Approx. 75 inches (1905 mm)
Width:
Approx. 42 inches (1067 mm)
Height:
Approx. 42 inches (1067 mm)
Wheelbase:
Approx. 48.4 inches (1229 mm)
Ground Clearance:
Approx. 6.5 inches (165 mm)
Dry Weight:
Approx. 440 lbs (200 kg)
Curb Weight:
Approx. 465 lbs (211 kg) with fluids.
Front Rack Capacity:
Approx. 45 kg (99 lbs)
Rear Rack Capacity:
Approx. 85 kg (187 lbs)
Atv Safety Standards:
Designed to meet relevant industry safety standards for ATVs.
Braking System Type:
Hydraulic disc brakes front and rear for reliable stopping power.
4Wd Engagement:
On-demand 4WD system for improved traction and control.
Handlebar Design:
Ergonomically designed for comfortable and secure grip.
Footwells:
Designed with protective floorboards to shield rider's feet.
Oil Change:
Recommended every 100 hours or 6 months, whichever comes first. Specific oil type and capacity in full service manual.
Air Filter Cleaning:
Check and clean every 20 hours or as needed in dusty conditions. Replacement intervals vary.
Spark Plug Check:
Inspect and clean/gap every 100 hours. Replace as needed.
Valve Clearance Check:
Recommended every 100 hours or annually. Precise specifications and adjustment procedures are critical and detailed in a full service manual.
Engine Oil:
Yamalube 4 (or equivalent SAE 10W-40, API SG, JASO MA) semi-synthetic or synthetic 4-stroke motorcycle oil.
Engine Oil Capacity:
Approx. 1.7 liters (1.8 US qt) with filter change. Exact capacity in full service manual.
Brake Fluid:
DOT 3 or DOT 4 brake fluid (check reservoir cap).
Gear Oil:
Specific Yamaha gear oil or SAE 80 hypoid gear oil for the differential and transmission. Capacity detailed in full manual.
Carburetor Cleaning:
Carburetors can become clogged with debris or varnish if the vehicle sits for extended periods without fuel stabilizer, requiring regular cleaning.
Suspension Wear:
Bushings and ball joints in the suspension can wear over time, leading to play and affecting handling, requiring periodic inspection and replacement.
Starter Motor Reliability:
While generally robust, starter motors can degrade over time, particularly with heavy use or poor battery maintenance.
Drive Belt Tension:
The CVT drive belt requires periodic inspection for wear and proper tension. A worn belt can lead to poor acceleration and slippage.
Yamaha Motors Corporation:
Yamaha has a long-standing history of producing high-quality motorcycles, powersports vehicles, and marine products, known for innovation and reliability.
Timberwolf Lineage:
The Timberwolf series was a popular line of utility ATVs, known for their balance of performance and practicality. It preceded or ran concurrently with other Yamaha ATV models like the Kodiak and Wolverine, offering a slightly different niche.
1999 Model Updates:
Specific updates for the 1999 model year would involve refinements in ergonomics, suspension tuning, and potentially minor drivetrain enhancements over previous iterations.
Manufacturing Location:
Typically manufactured in Japan or by Yamaha's overseas subsidiaries.
Production Years:
The Timberwolf 4WD (YFB250) was produced for several years in the late 1990s and early 2000s.
