Wiseco R1070 Yamaha FZR1000 / YZF1000 Forged Piston Top End Kit 78mm 12:1

The Wiseco R1070 is a complete top end rebuild kit designed for the Yamaha FZR1000 and YZF1000, featuring a 78.00mm bore and 12:1 compression ratio. This kit includes everything needed to oversize or rebuild the top end of your 4-stroke inline-four engine in a single purchase.

Kit Includes:

• Forged aluminum piston (PN: 4487M07800)
• Ring set (PN: 3071XG)
• Wrist pin (PN: S531)
• Circlip (PN: CW19)
• Top end gasket set (PN: W5483)

Key Features:

• Forged construction — engineered, forged, and machined in the USA (Mentor, OH) for superior tensile strength and service life
• Application-specific design — dedicated forgings optimized for the FZR1000 / YZF1000 engine to achieve the ideal strength-to-weight ratio
• Race-proven reliability — built to the tightest tolerances for peak performance and long-term durability
• Horizontal slot-pin oiling — reduces friction and provides scuff resistance with a pressure-seal groove for maximum ring seal
• Smooth dome finish — race-ready dome profile with smooth edges for improved combustion flow

Wiseco's forged 4-stroke piston technology has been proven at every level of competition, from Supercross and Motocross to Superbike and Grand Prix racing. The R1070 kit delivers the same race-developed performance for your street or track FZR1000 rebuild.