Wiseco PK1418 Top End Piston Kit Yamaha Raptor 700 11:1 CR 103mm Bore

The Wiseco PK1418 is a complete top end kit designed for the Yamaha Raptor 700, featuring a 103mm bore (4903M103) forged piston at an 11:1 compression ratio. Whether you're overboring a worn engine or performing a full top end rebuild, this kit includes every component needed to get the job done right the first time.

Wiseco forged pistons are manufactured using high-strength 4032 aluminum alloy and produced via a proprietary forging process that results in a denser, stronger piston than cast alternatives. The result is superior resistance to detonation, heat, and wear — making this kit an ideal choice for both stock rebuilds and performance-oriented applications.

Kit Includes:

• Forged 103mm (4903M103) piston at 11:1 compression ratio
• Piston rings
• Wrist pin (piston pin)
• Circlips (wrist pin retaining clips)
• Complete top end gasket set

Key Features:

• Forged aluminum construction — stronger and lighter than OEM cast pistons
• 11:1 compression ratio — performance-matched for the Raptor 700 platform
• 103mm bore diameter — designed for oversize cylinder applications
• Complete kit — no need to source individual components separately
• Manufactured to Wiseco's strict OEM-replacement and performance tolerances

Wiseco has been a trusted name in performance pistons for over 75 years, supplying professional racers and enthusiasts alike. The PK1418 delivers the reliability and performance Wiseco is known for, packaged as a convenient all-in-one top end solution for the Yamaha Raptor 700 (2006–2010).