Wiseco 490M06300 Forged Piston Kit Bore Oversize - 2-Stroke 63.00mm 1.00mm

The Wiseco 490M06300 is a classic forged 2-stroke piston kit designed for powersports engine rebuilds. With a 63.00mm actual bore diameter (1.00mm oversize over the standard 62.00mm), this kit delivers reliable, high-quality performance for vintage and recreational applications.

Piston Kit Specifications:

• Displacement: 175cc
• Bore – Standard: 62.00mm
• Bore – Actual: 63.00mm
• Bore – Oversize: +1.00mm
• Stroke: 57.00mm
• Wrist Pin: 16mm x 1.969" Non-Chromed
• UPC: 193564133625

Kit Contents (Part Numbers):

• 490M06300 – Forged piston
• 2480CD – 63.00mm ring set
• CW16 – Round wire pin locks, 16mm (pair)
• S255 – Piston pin, 16mm x 1.969" non-chromed

Key Features:

• Forged aerospace aluminum alloy construction for superior tensile strength over cast pistons
• CNC machined to tight tolerances for a precision, consistent fit
• Optimized piston shape and profile for maximum 2-stroke performance
• Compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Wide oversize range supports cast iron cylinder resleeving and bore restoration
• Diamond-turned finish ensures no size variation across units

Wiseco piston kits are a trusted choice for vintage motocross, classic street bike, and snowmobile rebuilds. Each complete kit includes everything needed for a full piston assembly: piston, ring set, wrist pin, and circlips — no additional components required.