Dynojet Stage 3 Carburetor Jet Kit Kawasaki Ninja 250R Dynojet Stage 3 jet kits are designed for motorcycles with a stock or mild engine modifications, paired with a high flow aftermarket exhaust system and airbox. The use of stage 3 jet kit typically yields a power increase of 10-15. Drivability may be compromised for street use. Features: Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time This stage 3 kit is fully adjustable to allow the use of well-designed aftermarket pipes and stock replacement air filters In most cases power increases of 10-15 can be achieved