Jet Kits

Unique set of lift holes moderate how the slide moves with respect to throttle position; the faster the slide opens, the quicker the throttle responseRevolutionary composite plastic slide provides unparalleled performance gains in both horsepower and...

Unique set of lift holes moderate how the slide moves with respect to throttle position; the faster the slide opens, the quicker the throttle responseRevolutionary composite plastic slide provides unparalleled performance gains in both horsepower and...

Include the jets, needles, instructions, etc. necessary to recalibrate stock engines with CV carbsRecalibrate your stock Keihin CV carb to make full use of the performance potentialKits provide broad-range performance gains and maintain stock...

Include the jets, needles, instructions, etc. necessary to recalibrate stock engines with CV carbsRecalibrate your stock Keihin CV carb to make full use of the performance potentialKits provide broad-range performance gains and maintain stock...

Include the jets, needles, instructions, etc. necessary to recalibrate stock engines with CV carbsRecalibrate your stock Keihin CV carb to make full use of the performance potentialKits provide broad-range performance gains and maintain stock...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes,...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes,...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes,...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes,...

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes,...

Dynojet Jet Kit - Stage 1 - Yamaha 4190 Yamaha -- YZ 426 F -- (2000, 2002, 2001)

Stage 1: stock engine/filters, stock/modified pipes; about a 5% power increaseStage 2: stock/mild modified engine, stock/modified pipes, stock/modified filters; about an 8% power increaseStage 3: stock/mild modified engine, stock/modified pipes,...