KFX450 KFX 450R 100mm Athena Cylinder Big Bore Kit 490 Complete Top End Rebuild
- 100mm Athena or OEM cylinder
- Forged JE or Wossner piston**
- Piston rings
- Wristpin
- Circlips
- Top end gasket kit
- Valve stem seals
- Head stud kit
- Cam chain
- Stickers
This is a bolt on kit with no machining required. Piston uses pump or race gas. Everything is brand new and the manufacturer's warranties apply***.
***Warranty: Unless otherwise stated, we stand behind the parts we sell 100%. If after installation there is an issue, contact us for a warranty return authorization. The parts we sell are not DIY. For any part(s) to be covered under warranty proof that they were installed by a professional mechanic must be provided. Also, the part(s) in question must be sent back to us for inspection first. We cannot warranty parts not installed correctly and we cannot warranty anything based on phone calls, photos, or another mechanic's assessment alone. Warranty does not cover failure due to improper installation, tuning, break in, or misuse. STUD WARRANTY: All stud kits come with a lifetime replacement warranty against failure during use (NOT INSTALLATION). If a failure occurs we will send a new complete stud kit free of charge. No other parts or any labor are included, and warranty can not be converted to a refund or discount on any order.
We ship next day most of the time. Modquad parts are shipped Monday-Thursday. Engine Kits are 3-5 business days.
We don't do backorder! If your items has already sold you will be notified immediately and you money refunded on the spot.
Sold items are removed daily.
If you see it on this website, it is 100% in stock unless it just sold before you clicked buy.
If you call we answer, if you text we respond, if you have a question we respond. Sometimes we sleep so it could be next morning but we will respond.
Thank you for shopping with us! We appreciate you!