Kawasaki KX250F KXF250 2006-2008 Service Manual

Motocross Action Magazine's own history of this generation doesn't undersell the shock value: "in 2006, Kawasaki threw off the shackles of its alliance with Suzuki, which had the two companies sharing products, and kicked out the jams... Kawasaki caught everyone sleeping. Yamaha had become complacent in its dominance, Honda was struggling with reliability issues, and Suzuki BNG'ed its 2005 model for '06. When all the shouting was done, Kawasaki had produced an engine that left the rest of the field wheezing... in a class where horsepower is king, the 2006 KX250F became instant royalty." Wikipedia's own account confirms the genuine scale of that 2006 redesign: "an all-new aluminum perimeter frame, a heavily revised engine, new Showa front and rear shocks, and Renthal handlebars."

Power comes from a 249cc liquid-cooled single-cylinder four-stroke engine, delivering a claimed 43 hp at 11,500 rpm and roughly 22 lb-ft of torque at 9,000 rpm. Autoevolution's own coverage of the 2006 launch confirms the extent of the engine work: "a revised carburetor, engine, and gearbox... a revised piston, intake valves, and polished intake ports that allowed a better flow of the fuel and air mixture," paired with a new cooling radiator and a taller front skid plate specifically designed to prevent mud from clogging the engine — Motocross Action's own testing confirms the payoff, noting the "KX250F hit hard in the middle and refused to give up on top," a genuinely dominant powerband that carried Kawasaki to the top of the 250 four-stroke class in both 2006 and 2007.

2008 brought genuine chassis and suspension refinement rather than another engine overhaul. Vital MX's own coverage details the changes directly: "new crankcases provide increased rigidity in the areas surrounding the crankshaft, transmission input and transmission output shafts to transfer torque more-efficiently and improve overall durability," alongside "smaller air passages at the top of the fork cartridges which provide an enhanced air 'spring' effect for smoother compression damping" and ".5mm thicker fork piston rods" for improved rigidity. Dirt Rider Magazine's own field-test riders confirmed these changes translated to real on-track feel: "the offsetting of the engine mounts 10mm to lessen the rigidity of the overall chassis" gave the bike "a lighter feel," while updated shock settings delivered "a smoother mid-stroke response" alongside "a slightly higher ride height" for quicker handling. Motocross Action's own sound testing confirmed the 2008 model checked in at a genuinely quiet 95.5 dB against a typical production bike's 98 dB. The chassis throughout this three-year span used a 47mm inverted telescopic fork with 16-way adjustable compression and rebound damping, paired with a fully adjustable Uni-Trak rear shock, riding on black-anodized wire-spoke wheels. Ready-to-ride weight (no gas) came in at 220 lbs, with a 36.9-inch seat height, and 2008 MSRP settling at $6,099-$6,100.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2006-2008 KX250F running the way it was built to.