Wiseco Pistons PK1594 Pro-Lite Top End Piston Kit Standard Bore - 66.40mm 2-Stroke

The Wiseco PK1594 is a complete Pro-Lite top end piston kit designed for standard bore 66.40mm (STD) 2-stroke applications. Built for riders who demand race-level reliability and performance during a top end rebuild, this kit includes every critical component needed to get the engine back to peak condition.

Kit Includes:

• Forged Pro-Lite piston — CNC machined from high-silicon, low-expansion aerospace aluminum alloy for superior strength, reduced weight, and improved heat transfer
• Ring set (2614CS — 66.40mm single ring)
• Wrist pin (S508 — 18mm x 2.106 in.)
• Circlips (CW18 — Round wire pin locks, 18mm, pair)

Key Features:

• Pro-Lite forged piston design optimized for peak horsepower and extended service life
• CNC machined cam shape and profile for precise fit and optimal performance
• Compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
• Race-proven design trusted by top teams in Supercross, Motocross, and GNCC competition
• Dedicated aerospace alloy forgings deliver an exceptional strength-to-weight ratio
• Manufactured in the USA at Wiseco's state-of-the-art facility

Specifications:

• Bore: 66.40mm (Standard)
• Displacement: 249cc
• Stroke: 72.00mm
• Cylinders: 1
• Wiseco Part Number: 768M06640

Note: This is a single-cylinder kit. Top end gaskets, bearings, and cylinder sleeves are not included. Be sure to confirm your cylinder's current bore size before ordering to ensure correct fitment.