This thorough how-to manual helps the off-road motorcycle enthusiast get the most out of their machine. This one-stop reference covers everything from basic maintenance to performance modifications, Engine rebuilding; Transmission rebuilding; Clutch repair and rebuilding; Big-bore kits; Cam kits and valve timing and tuning; Tuning stock suspension; Suspension revalving and kits; Jetting and tuning carburetors; Tuning electronic fuel injection; Wheels, tires, and brakes; Chains and sprockets; Cooling systems; Electrical systems