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:
- 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
- Sneakers: 1–2 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.
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