DYNOJET KIT YAMAHA YZF1000R 1997-2001 THUNDERACE STAGE 1

Designed for motorcycles with a stock engine using the stock airbox, air filter, and stock or aftermarket pipe. Stage 1 kits are fully adjustable to allow the use of well-designed aftermarket pipes and K&N stock replacement air filters. Stage 1 kits are designed to improve throttle response and driveability. In most cases power increases of approximately 5% throughout the entire power range can be achieved.