Wiseco 4606M08550 Forged ATV Piston Kit 85.50mm 10:1 Compression

The Wiseco 4606M08550 is a forged 4-stroke piston kit featuring an 85.50mm bore with a 10:1 compression ratio. This 402cc piston is designed as a 0.50mm (.020") oversize replacement, extending the service life of cylinders through reboring.

Key Features:

• Forged from high silicon, low expansion aluminum for superior strength, reduced weight, and improved heat transfer
• Complete kit includes high-quality piston rings, wrist pin, and circlips
• Engineered, forged, and machined in the USA in Mentor, OH
• Designed for specific engine applications and built to the tightest tolerances
• Diamond turned finish guarantees perfect surface with no size variation
• Floating wrist pin style with retainers included

Wiseco's forged pistons are tougher and more durable than cast pistons, standing up to the abuse that high performance motorsport applications require. The forging process creates condensed grain aligned to the part features, producing higher mechanical properties and resistance to impact and fatigue.

Specifications:

• Bore: 85.50mm (0.50mm oversize)
• Stroke: 70.00mm
• Compression Ratio: 10:1
• Displacement: 402cc
• Standard Bore: 85.00mm

Important Note: Oversize pistons require cylinder boring/sleeving. Only Wiseco replacement ring sets should be used on Wiseco pistons for proper performance and compatibility.