Wiseco 4702M07300 Forged Piston Kit Bore CR - 4-Stroke 73.00mm 13 1

The Wiseco 4702M07300 is a 4-Stroke Forged Series Piston Kit featuring a 73.00mm bore and a high-compression 13:1 compression ratio, engineered for the Kawasaki Ninja ZX-7R and ZX-7RR. This is a standard (STD) size piston, sold individually, and is part of Wiseco's CK110 application specification.

Wiseco pistons are forged and machined in the USA from high-silicon aluminum alloy, delivering the strength and durability required for high-performance street and track applications. The forging process produces a denser, stronger piston compared to cast alternatives, resulting in improved heat dissipation and reduced weight.

Key Features:

• Forged 4-Stroke Series construction for maximum strength and reliability
• 73.00mm bore diameter — standard (STD) size
• 13:1 compression ratio for increased power output
• Innovative piston skirt profile optimized for maximum horsepower and torque
• Lightweight forging design reduces reciprocating mass
• Cylinder deglazing required for installation
• Kit includes: piston, rings (2874XA), wrist pin (S537), and circlips (CW18)
• Compatible head gasket: W5886 (optional base gasket: W6052)

This kit is designed for standard bore applications. Cylinder deglazing is required prior to installation. For oversize applications, see Wiseco part 4703M07450 (74.50mm, 12.5:1 CR). Replacement ring set sold separately as 2874XA.