Dynojet Jet Kit Kawasaki Ninja 250R Includes stage 1 and stage 3 jets for stock to modified engines! Increases power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. Kit is fully adjustable to allow the use of well-designed aftermarket pipes and stock replacement air filters. In most cases power increases of 5 can be achieved. Features: Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time