Yamaha YZ250F 01–07 & WR250F 01–12 83mm 290cc Big Bore Kit – Athena (2001-2012)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
✓ Fits:
- 2001-2012 Yamaha YZ250F
- 2001-2012 Yamaha WR250F
✓ Features:
- 83mm Nickel-Carbide Cylinder – Factory Works porting
- Hard-Anodized Power Valves – high-flow, non-OEM
- 83mm big bore — +41cc (249cc → 290cc)
- Nickel-carbide plating — extreme durability, low friction
- Larger water jackets — superior cooling under race load
- Factory Works porting — max airflow, pro-tuned performance
- 12.5:1 forged piston — explosive mid-top power
✓ What's Included:
- Forged Piston Kit – 12.5:1 compression, molybdenum coating, rings, pin, clips
- Athena Top-End Gasket Set – head/base gaskets, seals, hardware
Ships fast from DuneGoonShop!
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
