Jet kits can improve the power and performance of your vintage Kawasaki, Suzuki, Honda or Yamaha from 5 to 15 percent over stock carburetor jets. Dynojet is the top name in jet kits, with a well-deserved reputation for quality and dependability. Stage 1 kits offer a profound improvement in performance over stock with little needed in the way of other modifications. Stage 2 and Stage 3 jet kits will usually require aftermarket pipes and air filters. Z1 is proud to stock KZ1000 jet kits, GS1150 jet kits, FJ1100 jet kits and CB750 jet kits by Dynojet, in addition to jet kits for other vintage Japanese performance bikes.