Segment:
High-performance sport ATV segment.
Reputation:
Renowned for its powerful two-stroke engine, agile handling, and competitive racing heritage.
Competitors:
Competed against other performance ATVs of its era, such as Yamaha Warrior, Suzuki LT250R, and Kawasaki Tecate.
Engine Type:
High-revving, liquid-cooled, two-stroke engine.
Suspension Design:
Advanced front and rear suspension for superior handling and comfort on varied terrain.
Braking System:
Powerful hydraulic disc brakes for reliable stopping power.
Performance Orientation:
Designed for sport riding, trail riding, and recreational racing.
Engine:
Complete Engine Overhaul, Diagnosis, Repair
Transmission:
Gearbox, Clutch, Kick Starter, Shift Linkage
Suspension:
Front & Rear Suspension, Steering Components
Brakes:
Hydraulic Disc Brake System Maintenance and Repair
Electrical:
Complete Electrical System Diagnosis and Repair
Fuel System:
Carburetion, Fuel Tank, Fuel Lines
Cooling System:
Radiator, Hoses, Coolant Management
Bodywork:
Fenders, Exhaust System
Maintenance:
Scheduled Maintenance, Lubrication, Tune-ups
Troubleshooting:
Problem Diagnosis and Solutions
Type:
Official Workshop Service and Repair Manual
Purpose:
Repair, Maintenance, Rebuild, Refurbish, Restoration
Printability:
Printable Pages
Engine Assembly:
Detailed disassembly, inspection, and reassembly of all engine components including cylinder head, cylinder, piston, connecting rod, crankshaft, and bearings.
Ignition System:
Diagnosis and repair of the ignition system, including stator, CDI unit, spark plug, and wiring.
Cooling System:
Information on the liquid-cooled system, including radiator, fan, thermostat, coolant capacity, and flush procedures.
Lubrication System:
Details on the oil pump, oil filter, oil passages, and oil change procedures.
Drivetrain:
Coverage of the transmission, clutch operation, gearshift mechanism, and kick starter assembly.
Chassis And Suspension:
Detailed procedures for front and rear suspension (A-arm, swingarm, shocks), steering system components, and wheel alignment.
Braking System:
Comprehensive coverage of the hydraulic disc brakes, including caliper maintenance, brake fluid specifications, bleeding procedures, and component replacement.
Electrical Circuitry:
Detailed wiring diagrams, component locations, and troubleshooting guides for all electrical systems, including lighting, ignition, and accessories.
Diagnostic Procedures:
Step-by-step diagnostic flowcharts and troubleshooting guides for common and uncommon issues.
Repair Procedures:
Detailed, illustrated instructions for the repair or replacement of virtually every component on the ATV.
Maintenance Schedules:
Recommended service intervals for oil changes, filter replacements, spark plug checks, chain adjustments, and other routine maintenance tasks.
Rebuilding Procedures:
Complete instructions for rebuilding major components such as the engine, transmission, and carburetor.
Torque Specifications:
Precise torque values for all fasteners to ensure correct assembly and prevent damage.
Assembly Instructions:
Clear, sequential instructions for assembling and disassembling the ATV.
Depth:
Comprehensive Workshop Level - suitable for professional technicians and advanced DIY enthusiasts.
Illustrations:
Detailed illustrations, diagrams, and exploded views of all components and systems.
Type:
Liquid-cooled, 2-stroke, single-cylinder
Bore X Stroke:
67.0 mm x 70.0 mm
Compression Ratio:
6.6:1 (approximate, varies by year)
Carburetor:
Keihin PD78A (or similar Mikuni, depending on year)
Horsepower:
Approx. 20-25 HP (peak, varies by year and tuning)
Torque:
Approx. 18-20 lb-ft (peak, varies by year)
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Fuel Mixture:
Pre-mix (50:1 ratio of gasoline to two-stroke oil)
Coolant Type:
Honda HP Coolant (or equivalent ethylene glycol-based coolant)
Coolant Capacity:
Approx. 1.5 L
Atv Safety Standards:
Complies with ANSI safety standards for recreational ATVs.
Braking System:
Dual front hydraulic disc brakes, single rear hydraulic disc brake.
Handlebar Design:
Grip-style throttle with thumb lever for precise control.
Lighting:
Headlights and taillight for visibility.
Engine Oil Change:
Every 1000 km or 6 months, whichever comes first. Check level more frequently.
Air Filter Cleaning:
Every 20 hours of operation or more frequently in dusty conditions.
Spark Plug Inspection:
Every 1000 km or 6 months.
Chain Lubrication Adjustment:
Every 500 km or more frequently if needed.
Engine Oil Type:
API SG SAE 10W-30 (for transmission and clutch)
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid
Coolant Type:
Honda HP Coolant or equivalent ethylene glycol-based coolant
Carburetor Fouling:
Can occur if the ATV sits for extended periods; regular fuel stabilizer use and cleaning are recommended.
Clutch Wear:
Normal wear and tear; clutch adjustment and eventual replacement may be necessary with heavy use.
Suspension Bushings:
Can wear over time, leading to play in suspension and steering; regular inspection is advised.
Cooling System Leaks:
Hoses and seals can degrade; check for coolant leaks regularly.
Manufacturer:
Honda Motor Co., Ltd., a globally recognized leader in powersports and automotive manufacturing.
Development:
The TRX250R was developed as a high-performance sport ATV, building on Honda's experience in motorcycle and ATV engineering.
Racing Influence:
Directly influenced by Honda's racing programs, emphasizing speed, agility, and durability.
Manufacturing Plant:
Primarily manufactured in Japan by Honda.
Legacy:
Considered a legendary and highly sought-after sport ATV for its performance and handling characteristics.
