Honda XR400R XR400 R 1996-2004 Service Manual

Motocross Hideout's own verdict on this bike's nine-year run is refreshingly simple: Honda built the XR400R with essentially no major changes from 1996 to 2004, only retiring it because the company shifted its lineup toward higher-performance enduro machines that were coming into greater demand — a decision unrelated to any real flaw in the XR400R itself. That reliability comes with a caveat, per the same review: since these bikes rarely broke down, plenty of owners neglected basic maintenance, so used examples deserve a genuinely careful once-over regardless of how solid the platform's reputation is.

Power comes from a 397cc air-cooled single, SOHC with Honda's RFVC (Radial Four Valve Combustion Chamber) design — four radially arranged valves around a single camshaft — delivering a claimed 34 hp at 6,500-7,000 rpm and roughly 24 lb-ft of torque at 5,500 rpm, run through a 5-speed manual transmission with wet multi-disc clutch and chain final drive. Fueling comes from a single carburetor, and Motocross Hideout's own troubleshooting notes flag lean jetting or flooding as the most common starting complaint on neglected examples — a properly tuned fuel screw makes a genuine difference in both hot and cold starts.

Sharing its frame, plastics, and suspension components with the smaller XR250R, the XR400R distinguished itself with a longer wheelbase and more suspension travel — a 43mm leading-axle Showa cartridge fork with 18-position compression and 12-position rebound damping delivering 11 inches of travel up front, paired with a Pro-Link Showa single-shock offering spring preload and 16-position compression adjustment at the rear. CycleChaos's own model history notes the swingarm pivot was combined with the rear engine mount from the very first 1996 model — a design choice that carried through the entire production run unchanged. Braking comes from a single 256mm front disc with a 2-piston caliper and a single rear disc, riding on an 80/100-21 front and 110/100-18 rear tire. Dry weight sits around 257 lbs, with a genuinely tall 36.6-inch seat height reflecting the bike's trail-riding and light off-road racing intent — many owners over the years have built these into serious enduro and motocross competitors with a widely available high-performance power kit.