Wiseco Pistons 561M08650 High-Performance ATV Piston Kit 86.50mm +0.020" Oversize

The Wiseco 561M08650 is a high-performance forged piston kit designed for four-stroke ATV applications requiring an 86.50mm bore diameter. This piston is oversized by 0.020 inches (0.50mm), making it ideal for engine rebuilds where cylinder boring is needed to restore proper piston-to-wall clearance or increase displacement.

Key Features:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength and durability
• CNC machined with diamond-turned finish ensures perfect dimensional accuracy
• Optimized cam and barrel design for improved performance and extended service life
• Complete kit includes piston, ring set, wrist pin, and circlips
• Designed specifically for four-stroke ATV engines with 86.50mm bore requirement
• Provides excellent heat transfer and reduced weight compared to cast pistons

Wiseco pistons are manufactured in the USA using state-of-the-art forging processes and have been the choice of professional racers and performance enthusiasts for over 80 years. This complete piston kit contains everything needed for installation except gaskets and bearings. Note that only Wiseco replacement ring sets should be used with Wiseco pistons to ensure proper fit and performance.