1986-1989 Honda TRX 250R Fourtrax Service Manual

• Covers all 1986–1989 Honda TRX 250R Fourtrax (liquid-cooled 2-stroke) ATVs.
• Contains 47 exploded-view diagrams and 35 torque-specification tables for engine and chassis systems.
• Key assembly specs included: Cylinder head bolt torque (24–29 N·m / 17–21 ft·lb), spark plug gap (0.7–0.8 mm), and front tire pressure (4.0 psi).

Getting the right specs on the bench fast is critical when you are tearing down a vintage 2-stroke. This 224-page factory service manual covers the complete 1986–1989 Honda TRX 250R Fourtrax production run. Because it is an instant download, you can pull up engine clearances or suspension geometry on your phone or tablet right at the workbench. No waiting for shipping, and no greasy fingerprints ruining expensive paper pages. It delivers a complete component-level breakdown of the engine, transmission, balancer, and crankshaft systems.

Tuning these liquid-cooled machines requires absolute precision. That is why the documentation details comprehensive fuel system tuning data, including jet needle settings and carburetor theory for varying altitudes and temperatures. Beyond the power plant, you get full factory data for the Pro-Link rear suspension, steering geometry, and hydraulic disc braking systems. Always verify tolerances and wear limits against this official OEM data before reassembling critical chassis or engine components to ensure safe vehicle operation.