Engines and Components› Pistons and Piston Rings
Athena
Athena 99-24 Yamaha YZ 250 2T 66.34mm Bore Forged 2-Stroke Top End Piston Kit w/Gasket Kit
SKU: A0EF P4F0664267019A
Advanced — 4+ hours
Description
This piston kit is compatible with Yamaha YZ 250cc models from 1999 to 2024, and Yamaha YZF 250cc models from 2016 to 2022.
Fitment
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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 P4F0664267019A |
Videos
NEW PRODUCT Athena Top End Piston Kit - 2T 4T 🆕
Installing 304cc Athena Big Bore Kit With GET Boost On My 2025 Yamaha YZ250FX
Yamaha YZ F 450 cc 2020-22 - the NEW Athena cylinder kits ⬆️
Part 1: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 250
Athena 4-Stroke Cylinder Kit Review by MotoEverything
🔥 ATHENA NEW EXTREME Big Bore Cylinder Kits for 250cc dirt bikes 🔥
The NEW Athena piston for KTM SX-F 350 cc dirt bikes 💥
Part 6: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 25
Part 7: Installing Athena 290 Big Bore Kit- Yamaha WR/ YZ 250
Tearing Down The YZ250 For Rebuild - Athena Big Bore Kit JUNK?
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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