Wiseco 40119M10200 Forged Piston Kit Compression - 4-Stroke 102mm 10 1

The Wiseco 40119M10200 is a high-performance forged piston kit featuring a 102.00mm bore and 10:1 compression ratio, designed for Yamaha 700cc powersports applications. Built in the USA, this kit delivers the strength and precision demanded by serious riders and racers.

Wiseco forges all of their own pistons in-house using dedicated forge tooling and aerospace-grade aluminum alloy, resulting in a superior strength-to-weight ratio compared to cast alternatives. Forged pistons feature condensed, aligned grain structure that provides higher mechanical properties and exceptional resistance to impact and fatigue — critical for high-stress powersports use.

Key Features:

• 102.00mm bore — standard bore fitment
• 10:1 compression ratio for optimized power output
• Armorglide skirt coating for reduced friction and extended piston life
• Forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer
• Innovative forging design and piston skirt geometry engineered to maximize horsepower and torque
• Race-proven design trusted by top teams in Supercross, Motocross, GNCC, and Superbike competition
• Precision crafted and forged in the USA

Kit Includes:

• Forged piston
• High-performance piston rings
• Wrist pin
• Circlips

Note: Oversize pistons require cylinder sleeving. Always verify bore size before installation.