Wiseco Forged Piston Kit with Gaskets - Yamaha YZ250F / WR250F (2005-2013) - 77.00mm Bore - 12.5:1 - Nikasil - 4-Stroke

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