Chewing gum kit high PWK / OKO / CP Polini

PWK / OKO / CP high jet kit Polini. Polini offers different jet kits with various sizes.
In this version, they are high jets for PWK type carburetors (Keihin, Oko, Stage6, Polini...). The kit includes 10 jets with selectable measurements from the dropdown menu. The jets have been manufactured with high precision to have minimal tolerance.

To find the right jet for your bike, you need to try several, it's a trial and error system. You should start with a larger jet to avoid damaging the engine due to a lean fuel mixture. To check if the jet is correct, you should observe the spark plug, if the spark plug appears gray or white, the mixture is lean so you should use a larger jet. On the other hand, if the spark plug appears sooty or wet, the mixture is rich so a smaller jet is needed. If the color is brown or "coffee with milk," then you have the correct jet in your carburetor.