Polini 77mm Big Bore Kit for 250cc Kymco and Daelim Scooters COMPATIBILITY: Arctic Cat – 250 2×4, DVX 250 Kymco – Bet & Win 250 (B&W), Grand Dink 250, People 250, Xciting 250, Yup 250, KXR 250, MXU 250, Maxxer 250, Maxxer 300 Daelim – S 250 Easy to install, plus when used with other upgrades such as new air filter, exhaust, and carb you get the full performance from your engine to achieve higher speeds and take off. You can also re-jet your carb, add exhaust for excellent results or a new exhaust to add much needed power. When clutch is added it lets you use the added power for quick take off for a scooter to get up to speed and keep up with traffic. Combine this with a bigger CAM and a bigger exhaust and it will feel like a totally different bike. This kit also works on the Moongoose 250 upgrading it to the Moongoose 300 ATV. This cylinder kit will not work on the CFMoto / CN250 engines. **