The 1986 Honda TRX250R is a high-performance sport ATV featuring a liquid-cooled 246cc two-stroke engine, Pro-Link rear suspension, and manual 6-speed transmission. This service manual covers maintenance procedures, specifications, troubleshooting, and repair instructions for the complete ATV system including engine, chassis, electrical, and suspension components.
This manual provides complete service information for the 1986 Honda TRX250R. Includes safety precautions, tool requirements, and general maintenance procedures.
| Component | Description |
|---|---|
| Model | TRX250R |
| Year | 1986 |
| Type | Sport ATV |
| Engine | 246cc liquid-cooled 2-stroke |
| Transmission | 6-speed manual |
| Final Drive | Chain |
| Suspension Front | Independent double wishbone |
| Suspension Rear | Pro-Link swingarm |
Regular maintenance schedule and procedures to ensure optimal performance and longevity.
WARNING! Always use genuine Honda parts and recommended fluids. Follow torque specifications precisely.
Complete engine disassembly, inspection, and reassembly procedures.
CAUTION! Engine must be completely cool before disassembly. Use proper sealing compounds during reassembly.
Carburetor service, fuel tank maintenance, and fuel line procedures.
| Component | Specification |
|---|---|
| Carburetor Type | 34mm PJ |
| Main Jet | #165 |
| Pilot Jet | #58 |
| Needle Clip Position | 3rd groove |
| Float Level | 12.5mm |
| Fuel Pressure | Gravity feed |
Complete electrical system diagnosis and repair procedures.
Tip: Always disconnect battery before electrical work. Use multimeter for proper diagnosis.
Frame, suspension components, and steering system service.
Transmission, clutch, and final drive system service procedures.
WARNING! Transmission work requires complete engine disassembly. Follow factory service procedures exactly.
Hydraulic disc brake maintenance and repair procedures.
| Component | Specification |
|---|---|
| Brake Fluid Type | DOT 4 |
| Front Disc Diameter | 174mm |
| Rear Disc Diameter | 190mm |
| Pad Thickness (min) | 1.5mm |
| Rotor Thickness (min) | 3.0mm |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Hard starting | Fouled plug, stale fuel | Replace spark plug; drain old fuel; check compression |
| Poor performance | Clogged carb, air leak | Clean carburetor; check reed valve; inspect base gasket |
| Transmission noise | Worn gears, low oil | Check oil level; inspect transmission gears |
| Overheating | Low coolant, water pump | Check coolant level; inspect water pump impeller |
| Electrical failure | Bad stator, CDI unit | Test stator output; check CDI unit; inspect wiring |
Complete electrical schematics and wiring diagrams for the 1986 TRX250R. Includes color-coded wiring, connector locations, and component identification.
Service Support: For technical assistance or genuine parts, contact authorized Honda dealership or visit Honda's official service website.