Take your performance to new heights with a Carburetor Jet Kit for your dirt bike. Increase power and improve performance throughout the entire RPM range, while improving throttle response and smoothness. These Carburetor Jet Kits take the guesswork out of tuning your dirt bike. Whether you’re rolling with a stock dirt bike or you’ve made some modifications, our Jet Kit will optimize your air/fuel ratio to eliminate rough spots and help you take control of your dirt bike’s power. You can go with a Stage 1 Jet Kit to give your stock engine a 5% boost of horsepower or send it all the way up to Stage 3, to get the most of the modifications you’ve made to your bike. STAGE 1 DETAILS Perfect for Dirt Bikes with a stock engine using the stock airbox, air filter, and pipes. Stage 1 Jet Kits are engineered to improve throttle response and deliver approximately 5% more horsepower than stock. These kits are fully adjustable to allow the use of well-designed aftermarket pipes and stock replacement air filters, like K&N.