05-08 TRIUMPH SPDMA865: Dynojet Stage 1 Jet Kit Intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe. Stage 1 kits are fully adjustable to allow the use of a well designed aftermarket pipes and stock replacement air filters like K&N. Stage 1 kits are designed to improve throttle response and drivability and in most cases power increases of approximately 5% throughout the entire power range can be achieved.Maximizes carburetor performance.Includes step-by-step instructions.Dynojet Jet 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.