The Honda CRF100F is the best-selling off-road bike of all time. Why? Amazing versatility, long-term toughness and all-around fun are the hallmarks of the CRF100F. Simple, proven, dependable 99cc four-stroke engine produces smooth, easy-to-use power that's ideal for recreational riders. Valve-guide, valve-stem seal and piston-ring design minimize oil consumption and maintain consistent power delivery at all operating temperatures.