Honda TRX350 D FOURTRAX Fourtrax 1986-1989 Service Manual

Cyclepedia's own model coverage confirms exactly what makes this range genuinely distinct across its four-year run: "1986 Honda TRX350 Fourtrax 4WD, 1987 Honda TRX350D Foreman 4x4, 1987 Honda TRX350 Fourtrax 4WD, 1988 Honda TRX350D Foreman 4x4, 1989 Honda TRX350D Foreman 4x4" — a genuine mid-production naming transition where Honda rebadged the same fundamental 350cc 4x4 platform from "Fourtrax" to "Foreman" partway through 1987, with both names coexisting briefly in the same model year before "Foreman" became the sole designation through 1989.

Power comes from a carbureted single-cylinder four-stroke engine feeding a wet-clutch transmission, delivering drive through a genuine four-wheel-drive final drive system with a dedicated differential — Cyclepedia's own chapter breakdown confirms coverage of both the primary and secondary clutch systems, alongside right crankcase cover, right engine components, and gear service, reflecting the mechanically involved drivetrain this generation of 4x4 ATV required compared to a simpler 2WD utility quad.

The factory-grade documentation for this range, per Cyclepedia's own detailed table of contents, covers genuinely comprehensive periodic maintenance procedures: clutch adjustment, throttle free play, brake fluid and brake shoe inspection, engine oil and final drive/differential oil changes, spark plug service, compression checks, air filter servicing, valve clearance, and toe-in adjustment — the kind of routine upkeep schedule essential for keeping an aging 4x4 quad's driveline and steering geometry correctly maintained. The fuel system section covers full carburetor removal, disassembly, and reassembly along with fuel pump, fuel tank, fuel strainer, air box, and exhaust system service — genuinely thorough coverage for a carbureted-era machine where fuel-delivery troubleshooting remains one of the most common real-world repair needs. One customer testimonial captured in Cyclepedia's own product page speaks to the manual's practical value directly: "the Cyclepedia Honda TRX350D Fourtrax online manual is a superb idea and I am delighted with its detail. I could not have carried out the engine repairs I did without it!" Because this range spans the genuine Fourtrax-to-Foreman naming transition on the same underlying 350cc 4x4 platform, correct model identification (TRX350 versus TRX350D, and the specific model year) against the VIN and engine number remains the safest way to confirm exact specifications before ordering parts.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 1986-1989 TRX350/TRX350D FourTrax/Foreman 4x4 running the way it was built to.