Wiseco 543M06700 2-Stroke Pro-Lite Piston Kit Standard Bore 66.94mm

The Wiseco 543M06700 is a forged 2-stroke Pro-Lite piston kit for dirt bikes, built to a standard bore size of 66.94mm. Designed as a high-performance upgrade over OEM pistons, this kit delivers improved strength, tighter tolerances, and longer service life under demanding off-road riding conditions.

Wiseco forges all pistons in-house at their U.S. facility, allowing complete control over every step of the manufacturing process — from raw material to finished part. The result is a piston that outperforms cast alternatives in strength, durability, and dimensional consistency.

Kit Includes:

• 1 forged aluminum piston
• 1 ring set (Wiseco replacement rings)
• 1 wrist pin
• 2 circlips

Key Features:

• Standard bore: 66.94mm — designed for stock bore cylinders
• Forged construction for superior strength-to-weight ratio versus cast pistons
• CNC machined for optimal cam shape, profile, and peak performance
• High-performance ring set included for extended service life
• Precision wrist pin for consistent, durable fit
• Only Wiseco replacement ring sets should be used on Wiseco pistons
• Top-end bearings, gaskets, and cylinder sleeves are not included

This piston kit is intended for standard bore applications. Always measure your cylinder bore before ordering to confirm the correct size. For oversize bores, cylinder sleeving or replating may be required.