Positioning:
The definitive guide for owners and technicians of the 1987-1992 Suzuki LT250R QuadRacer, offering factory-level repair and maintenance information.
Comparison To Dealer Manuals:
This manual is equivalent to the Official Factory Service Manual (FSM) used by authorized Suzuki dealerships.
Features:
Contains detailed illustrations, part diagrams, torque specifications, maintenance schedules, troubleshooting guides, and step-by-step repair instructions for all major systems.
Years Covered:
1987, 1988, 1989, 1990, 1991, 1992
Model Variants Covered:
LT250R QuadRacer (all configurations and model years within the range)
Type:
Official Full Workshop Service and Repair Manual (FSM)
Delivery Format:
Instant Download (PDF)
Engine:
Complete engine overhaul, tear-down, rebuild, tuning, troubleshooting, component identification, lubrication, cooling system, fuel system (carburetor, jets, fuel pump), exhaust system.
Chassis:
Frame, suspension (front forks, rear swingarm, shocks, linkage), steering system, wheels, tires, brakes (hydraulic front and rear, pads, rotors), fenders, body panels, plastics.
Electrical System:
Ignition system (stator, CDI, spark plug), lighting, charging system, switches, wiring diagrams, troubleshooting electrical faults.
Maintenance And Tune Up:
Periodic maintenance schedules, tune-up procedures, fluid changes (coolant, oil), filter replacement, spark plug checks, carburetor adjustments, valve clearance (where applicable to two-stroke port timing concepts).
Repair And Rebuild:
Complete engine rebuild, transmission disassembly and assembly, suspension rebuild, brake caliper overhauls, carburetor rebuilding, electrical component replacement.
Troubleshooting:
Diagnostic procedures for common problems, error codes (if applicable), no-spark diagnosis, poor running issues, starting problems, clutch slippage, brake issues.
Depth:
Comprehensive: Covers everything from basic maintenance to complete teardown and rebuilds, including detailed diagrams, torque specifications, and diagnostic flowcharts, suitable for professional mechanics and experienced DIY enthusiasts.
Engine Type:
Two-stroke, single-cylinder
Displacement:
246cc (approximately, specific bore/stroke varies by sub-model)
Cooling System:
Liquid-cooled
Estimated Horsepower:
Approximately 25-30 HP (varies by model year and tuning)
Carburetor Type:
Mikuni VM series (specific model/jetting varies, e.g., VM28SS or similar)
Fuel Delivery:
Carburetor with fuel pump
Spark Plug Recommendation:
NGK BR9ES or equivalent (refer to manual for specific model year)
Two Stroke Oil Mixture:
50:1 ratio with high-quality two-stroke oil (manual will specify type)
Reed Valve System:
Standard component for intake, manual covers inspection and replacement.
Wheelbase:
Approximately 49.6 inches (1260 mm) (varies slightly by model year)
Dry Weight:
Approximately 364 lbs (165 kg) (varies slightly by model year)
Front Tire Size:
AT21x7-10 (common, refer to manual for specific year/model)
Rear Tire Size:
AT20x11-9 (common, refer to manual for specific year/model)
Oil Change Recommendation:
Refer to manual for specific hours or mileage; typically every 20-30 hours of operation for two-stroke engine oil and transmission fluid.
Air Filter Cleaning:
Frequent checks and cleaning recommended, especially in dusty conditions. Manual provides specific interval and cleaning procedure.
Coolant Type:
Ethylene glycol-based antifreeze and water mixture (specific ratio and type detailed in manual).
Common Problems:
Potential issues can include carburetor clogging due to infrequent use, wear on clutch plates, rear shock absorber deterioration, and ignition system component failures. Manual addresses diagnosis and repair.
Torque Specs:
Comprehensive torque specifications for all critical fasteners are provided for engine, chassis, and suspension components.
Carburetor Jetting:
Manual details main jet, pilot jet, and needle settings for various altitudes and conditions, enabling precise tuning.
Manufacturer:
Suzuki Motor Corporation, a long-standing Japanese manufacturer known for its motorcycles, ATVs, and automobiles.
Quadracer Lineage:
The LT250R was a key model in Suzuki's performance ATV lineup, evolving from earlier models and preceding later generations like the LT-Z series.
Production Span:
1985-1992 (this manual covers the later, refined version from 1987-1992)
