Wiseco 2403M08100 Pro-Lite Forged Piston Kit Bore - 2-Stroke 81.00mm

The Wiseco 2403M08100 Pro-Lite Piston Kit is a complete forged 2-stroke piston kit featuring an 81.00mm (3.189 in.) bore — a 4.50mm oversize — designed for demanding powersports applications including snowmobiles. Machined from high-silicon, low-expansion forged aluminum alloy, this piston delivers superior strength, reduced weight, improved heat transfer, and extended service life compared to cast alternatives.

Key Features:

• Pro-Lite forged 2-stroke piston — CNC-machined for optimal cam shape and profile
• 81.00mm bore diameter (4.50mm oversize); standard bore 76.50mm
• 65.00mm stroke
• Floating wrist pin — 0.787 in. (20mm) pin diameter
• KD Series ring — alloy steel, ferrox-coated, chrome-faced, internally notched, half-keystone design
• Diamond-turned finish for precise sizing and consistent fitment
• Manufactured in the USA

Kit Includes:

• One (1) forged Pro-Lite piston
• Ring set (KD Series)
• Wrist pin
• Circlips

The Wiseco Pro-Lite line is built on decades of 2-stroke piston development, optimized for all-purpose riding and racing conditions. This kit improves engine efficiency and maximizes torque and throttle response. Note: Oversize pistons require cylinder boring or sleeving to the specified bore diameter.