Category:
Sport ATV (All-Terrain Vehicle)
Target Audience:
Recreational riders, off-road enthusiasts, and DIY mechanics.
Competitors:
Suzuki QuadSport LT250R, Honda TRX250R, Kawasaki Mojave KSF250.
Defining Characteristics:
Lightweight, agile handling, powerful 2-stroke engine, and iconic status among enthusiasts.
Model Identity:
The Yamaha Blaster YFS200 is renowned for its fun factor and accessibility in the performance ATV market.
Applicable Years:
1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Model Variants:
YFS200U, YFS200A, YFS200P (all significant variations within the specified years)
Estimated Pages:
Approx. 300-500 pages (typical for comprehensive factory service manuals of this era)
Type:
Factory Service Manual / Workshop Manual / Repair Manual
Engine:
Detailed breakdown of the 2-stroke engine, including cylinder, piston, crankshaft, connecting rod, carburetor, lubrication, and cooling systems.
Transmission:
5-speed manual transmission with clutch, gears, shift mechanism, and lubrication.
Chassis And Suspension:
Front and rear suspension components (shocks, springs, control arms), steering system, frame, sub-frame, and swingarm.
Brakes:
Hydraulic disc brake systems (front and rear), including calipers, master cylinders, brake lines, and pads.
Electrical System:
Ignition system (CDI), lighting, starter motor, battery, wiring diagrams, fuses, switches, and instrumentation.
Fuel System:
Fuel tank, fuel lines, fuel filter, and carburetor (Mikuni VM26SS).
Cooling System:
Air-cooled engine with cooling fins; maintenance related to airflow and heat dissipation.
Bodywork And Trim:
Fenders, plastics, seat, handlebars, and other cosmetic and functional body components.
Routine Maintenance:
Oil changes, filter replacements, chain adjustments, air filter cleaning, spark plug replacement, and general inspections.
Engine Rebuild:
Complete engine disassembly, inspection, repair, and reassembly procedures, including torque specifications.
Carburetor Service:
Disassembly, cleaning, inspection, adjustment, and rebuilding of the Mikuni VM26SS carburetor.
Transmission Overhaul:
Gearbox inspection, bearing replacement, seal replacement, and reassembly.
Suspension Repair:
Front and rear shock absorber servicing, fork seal replacement, and linkage maintenance.
Brake System Repair:
Brake bleeding, pad replacement, caliper service, and master cylinder rebuilding.
Electrical Troubleshooting:
Diagnostic procedures for common electrical faults, including detailed wiring diagrams.
Frame And Bodywork Repair:
Procedures for removing and reinstalling body panels, plastic components, and basic frame inspection.
Depth:
Comprehensive factory-level service information, suitable for both amateur enthusiasts and professional mechanics.
Diagnostic Tools:
Includes information on how to diagnose issues, though specific proprietary diagnostic tools are not typically required for this model.
Troubleshooting Charts:
Detailed troubleshooting guides and charts for diagnosing common problems across all systems.
Type:
2-stroke, reed valve, liquid-cooled (Note: The YFS200 is air-cooled, but this is a common manual inclusion for engine types in general, the manual will specify air-cooled)
Bore X Stroke:
66.0 mm x 57.0 mm
Compression Ratio:
6.6:1 (approx.)
Cooling Method:
Air-cooled
Horsepower:
Approx. 18-22 hp (depending on year and tuning)
Torque:
Approx. 14-16 lb-ft (depending on year and tuning)
Carburetor Model:
Mikuni VM26SS
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Fuel Capacity:
2.0 US gal (7.7 L)
Oil Type:
2-stroke engine oil (premix or oil injection system)
Oil Ratio:
50:1 ratio for premix (refer to manual for specific oil brand recommendations)
Rollover Protection:
N/A (ATVs are not equipped with ROPS as standard)
Crash Test Results:
N/A (ATVs are not subject to automotive crash testing standards)
Braking System:
Hydraulic front and rear disc brakes for reliable stopping power.
Throttle Limiter:
Some early models or aftermarket modifications may include throttle limiters for younger riders.
Lighting:
Dual 30W headlights and a 5W taillight/brake light for visibility.
Handguards:
Optional or aftermarket handguards recommended for protecting hands from debris and impacts.
Engine Oil Change:
Every 3000 km (1860 miles) or 6 months, whichever comes first (refer to manual for specific conditions).
Air Filter Cleaning:
Inspect every 500 km (310 miles), clean as needed (more frequently in dusty conditions).
Spark Plug Replacement:
Recommended every 3000 km (1860 miles) or as needed based on inspection.
Chain Lubrication And Adjustment:
Lubricate every 500 km (310 miles) and check/adjust tension every 1000 km (620 miles) or as needed.
Engine Oil:
Yamalube 2-stroke oil or equivalent, mixed at 50:1 ratio or via oil injection.
Transmission Oil:
Yamalube SAE 10W-30 or equivalent API SE, SF, SG.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Carburetor Jetting:
Can require re-jetting with aftermarket exhaust or air filter modifications.
Clutch Wear:
Clutch plates can wear over time, especially with aggressive riding, requiring replacement.
Power Valve Cleaning:
The exhaust power valve can accumulate carbon and require periodic cleaning for optimal performance.
Electrical Connections:
Corrosion in electrical connectors can lead to intermittent issues.
Manufacturer:
Yamaha Motor Corporation, known for a wide range of recreational and performance vehicles, including motorcycles, ATVs, and watercraft.
Major Updates:
While the core design remained consistent, minor updates throughout the production run addressed reliability and minor feature enhancements.
Production Period:
1988 - 2006
Manufacturing Location:
Primarily manufactured in Japan and/or the United States.
Discontinuation Reason:
Discontinued due to evolving emissions regulations and market shifts towards 4-stroke ATVs.