This Polini Keihin hex style main jet kit works with Polini PWK carburetors. 

Jetting is something that takes trial and error. See our blog page of for more info.

Original Parts For Scooters SKU 146-35

Specifications:

• Thread Size: M5x0.80
• Overall Length: 16.5mm
• Jet sizes: #140 - #158 (even numbers)

Compatibility: Bikes running Polini PWK carbs

About Polini:  For over 50 years, Polini has stood unparalleled in the racing and tuning scene.  Polini has powered both off-road and road racing legends to multiple MXGP and MotoGP world championships including the legendary Valentino Rossi.  Polini sets the standard for high-end tuning and top-quality performance components.

Made in Italy

This product is intended for off-road use only.

This product is not intended for use on public roads or land.

This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.

*Performance upgrades are considered racing parts and are not covered by warranty.