1985-1987 Honda TRX250 Fourtrax ATV Factory Service & Repair Manual (P/N C4085-91017)

This 233-page OEM Honda service manual (Publication C4085-91017) serves as the foundational reference for the 1985–1987 TRX250 Fourtrax. It documents exact engine, chassis, electrical, and fuel system specifications for the 246 cc air-cooled single-cylinder build. Whether you are running a busy professional workshop or maintaining your own ATV, having the authorized service values on hand ensures consistent mechanical results and saves valuable diagnostic time. Always cross-reference the documented factory torque limits and safety protocols before dismantling heavy chassis components to prevent personal injury or equipment damage.

Delivery and Document Features

• Covers all 1985–1987 Honda TRX250 Fourtrax ATV production variants
• Contains 47 exploded-view diagrams and 27 torque tables
• Essential reference data for accurate diagnostic and repair workflows

Technical Contents and Specifications

The text outlines comprehensive procedures for the entire drivetrain and air-cooled engine. You will find detailed sections covering cam timing, valve clearance checks, and cylinder-piston inspection. Chassis chapters outline steering head bearing maintenance, suspension checks, and drive shaft lubrication. Electrical sections list exact reference values for CDI components, lighting systems, and charging circuits. By documenting each system step-by-step, the guide functions as an indispensable asset for fast and precise repair work on the shop floor.

Key technical data points include:

• Fuel tank capacity: 10.0 liters
• Intake valve clearance: 0.08 mm
• Cylinder compression: 12.5 kg/cm²
• Torque requirements listed in both Nm and ft-lb