08-12 KAWASAKI EX250: Dynojet Stage 2 Jet Kit Intended for motorcycles with a stock or mildly tuned engine using a well designed aftermarket pipe with a modified airbox and a stock replacement air filter. Stage 2 kits are designed for applications where individual filters cannot be installed and for applications where airbox modification improves the engine&#39;s performance. In most cases power increases of approximately 8&#37; can be achieved.Maximizes carburetor performance.Includes step-by-step instructions.Dynojet Jet Kits:Dynojet offers a wide range of kits to fit any application. Several types (stages) of kits are available to fit your specific needs. Whether you run a standard motorcycle, or a tuned sportbike, Dynojet Carburetor Jet Kits can provide you with a simple and affordable solution to all your carburetion problems.