Wiseco Forged Piston Kit with Gaskets - Yamaha YZ250F / WR250F (2005-2013) - 77.00mm Bore - 13.5:1 - RACE ONLY - Nikasil - 4-Stroke
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Wiseco Forged Piston Kit with Gaskets - Yamaha YZ250F / WR250F - RACE ONLY
Premium Wiseco forged piston kit with complete top-end gasket set for the Yamaha YZ250F and WR250F. This is a RACE ONLY piston with 13.5:1 compression featuring ArmorGlide® coating for maximum performance!
⚠️ RACE ONLY - Nikasil Cylinder Required
- RACE ONLY application - Not for street use
- Fits Nikasil bore cylinder only
- Dual ring design
Kit Includes
- Piston Kit #4881M07700
- Ring Set #7700YC
- Wrist Pin #S742
- Wrist Pin Retainer Set #CW16
- Gasket Kit #W5921
Key Features
- Forged Series design for maximum strength and durability
- 2618 aluminum alloy construction - preferred for high-performance racing
- ArmorGlide® skirt coating for reduced friction
- 13.5:1 compression ratio for race-level power
- Complete top-end gasket kit included
- Standard bore - direct replacement
Piston Specifications
- Bore Size: 77.00 mm (Standard)
- Piston Diameter: 76.95 mm
- Stroke Length: 53.60 mm
- Compression Ratio: 13.5:1
- Material: 2618 Aluminum Alloy
- Skirt Coating: ArmorGlide®
- Ring Design: Dual Ring
Engine Specifications
- Displacement: 250cc
- Engine Type: 4-Stroke
- Weight: 1.15 lbs
Fitment
- Yamaha YZ250F: 2005-2007
- Yamaha WR250F: 2005-2013
📦 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.
