Wiseco High-Performance Forged Piston Kit with Gaskets - Yamaha YZ250F (2014-2015) - 77.00mm Bore

Wiseco High-Performance Forged Piston Kit with Gaskets - Yamaha YZ250F

Premium Wiseco forged piston kit with complete top-end gasket set for your Yamaha YZ250F. Everything you need for a professional top-end rebuild in one convenient package.

⚠️ Important: Nikasil Cylinder

This piston kit fits Nikasil bore cylinders only. Verify your cylinder type before ordering.

Kit Includes

• Wiseco Forged Piston (#40116M07700) - Premium 2618 aluminum alloy
• Ring Set (#7700YC) - Wiseco performance rings
• Wrist Pin (#S742)
• Wrist Pin Retainer Set (#CW16)
• Top End Gasket Kit (#W6929) - Complete gasket set for top-end rebuild

Key Features

• Premium forged 2618 aluminum alloy construction
• Complete top-end gasket kit included
• High compression 13.5:1 ratio for maximum performance
• Pistons, rings, wrist pins, and circlips for one complete engine
• Designed for Nikasil bore cylinders

Important Notes

• Fits Nikasil bore cylinder only
• Wiseco ring types are not interchangeable (i.e., CD is not interchangeable with LC)
• Wiseco pistons can be fitted only with Wiseco rings
• Cylinder sleeves must be purchased separately if needed

Piston Specifications

• Bore Size: 77.00 mm (Standard)
• Piston Diameter: 76.96 mm
• Stroke Length: 53.60 mm
• Compression Ratio: 13.5:1
• Material: 2618 Aluminum Alloy
• Skirt Coating: Non-Coated
• Style: Forged Series

Engine Specifications

• Displacement: 250cc
• Engine Type: 4-Stroke
• Weight: 1.1 lbs

Fitment

Yamaha:

• YZ250F: 2014-2015

Why Wiseco?

Wiseco is the gold standard in forged pistons. Their 2618 aluminum alloy pistons are designed for high-performance applications where strength and durability are critical. Forged pistons are stronger and more durable than cast pistons, making them ideal for racing and aggressive riding.