Polini Main Jet Kit for OKO, PWK, Keihin (for ysr bundle)

Main jet kit for polini/pwk/oko style carb. Includes 10 jets, Main jets are responsible for the amount of fuel delivery from 5/8-full throttle. Any time you change your displacement, exhaust, or intake, you need to rejet your bike.

These WILL NOT fit stock carbs, unless its for a pwk/oko/keihin style carb.

PLEASE do your research before purchasing Please select the following set 80-98 100-118 120-138 140-158 

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