Wiseco 439M07100 High-Performance Piston Kit 71.00mm Bore Kawasaki

The Wiseco 439M07100 is a high-performance forged piston kit designed for Kawasaki 250cc engines, featuring a 71.00mm bore size (1.00mm oversize). This complete piston assembly is engineered to deliver superior strength, reduced weight, and improved heat transfer compared to stock cast pistons.

Complete Kit Includes:

• Forged aluminum piston
• Piston rings (steel top ring with gas nitrided facing, cast iron second ring)
• Wrist pin (floating style)
• Circlips (wrist pin retainers)

Key Features:

• Forged from high silicon, low expansion aluminum alloy for maximum durability
• Diamond-turned finish from CNC computer controlled turning centers ensures perfect sizing with no variation
• Gas nitrided top ring facing for enhanced wear resistance
• Compatible with all cylinder bore compositions including cast iron, chrome, nikasil, and boron composite
• Made in USA at Wiseco's state-of-the-art manufacturing facility

Specifications:

• Bore: 71.00mm (1.00mm oversize)
• Stroke: 64.90mm
• Material: Forged aluminum
• Wrist Pin Style: Floating

Wiseco pistons feature condensed grain structure aligned to part features, producing higher mechanical properties and superior resistance to impact and fatigue. Backed by over 70 years of racing experience, this piston kit delivers the performance and reliability demanded by both high-performance racers and recreational enthusiasts.