Engines and Components› Cylinder Heads and Components
Athena
Athena 20-21 Yamaha YZ 125 X Big Bore Complete Cylinder Kit
SKU: A0EF P400485100030
Moderate — 2–4 hours
Description
Part #: P400485100030
Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.
MIA's Description
Fitment
Fitment Guaranteed
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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Athena |
| Part Number | A0EF P400485100030 |
Videos
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Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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