Wiseco Forged Piston Kit with Gaskets - Yamaha YZ250F / WR250F (2005-2013) - 77.00mm Bore - 12.5:1 - Nikasil - 4-Stroke
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Wiseco Forged Piston Kit with Gaskets - Yamaha YZ250F / WR250F - Nikasil Cylinder
Premium Wiseco forged piston kit with complete top-end gasket set for the Yamaha YZ250F and WR250F. This kit fits Nikasil bore cylinders and features 12.5:1 compression for reliable high-performance!
⚠️ Nikasil Cylinder Required
This piston is designed specifically for Nikasil bore cylinders.
Kit Includes
- Piston Kit #4882M07700
- Ring Set #7700XU
- 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
- 12.5:1 compression ratio
- Complete top-end gasket kit included
- Standard bore - direct OEM replacement
- 9 years of fitment!
YZ250F / WR250F Piston Options
This is the 12.5:1 compression Nikasil version. For the 13.5:1 Race Only version, see SKU 0903-0558.
Piston Specifications
- Bore Size: 77.00 mm (Standard)
- Piston Diameter: 76.95 mm
- Stroke Length: 53.60 mm
- Compression Ratio: 12.5:1
- Material: 2618 Aluminum Alloy
- Skirt Coating: Non-Coated
Engine Specifications
- Displacement: 250cc
- Engine Type: 4-Stroke
- Weight: 1.25 lbs
Fitment
Yamaha:
- YZ250F: 2005-2007
- 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.
