Yamaha YZ250F 01–07 & WR250F 01–12 83mm 290cc Big Bore Kit – Athena (2001-2012)
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- 30-day hassle-free returns
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✓ 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:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
