4765M08300 Wiseco Std Piston Kit for Kawasaki ZX1200 Ninja ZX-12R 83 mm 13.5:1 C

Wiseco Std Piston Kit for Kawasaki ZX1200 Ninja ZX-12R

This Wiseco Standard Piston Kit (part 4765M08300, 83 mm bore, 13.5:1 compression ratio) provides a drop-in replacement piston for rebuilding the top end of the ZX1200 Ninja ZX-12R engine.

Overview

This Wiseco standard piston kit for the Kawasaki ZX1200 Ninja ZX-12R restores factory bore dimensions when the cylinder is in good condition and only the piston needs replacing. The 13.5:1 compression ratio matches original engine specifications, keeping power delivery consistent after the rebuild. It suits riders and mechanics handling routine top-end service on a ZX-12R.

Built For Performance

• Forged piston construction for strength under high-rpm sportbike use
• 83 mm standard bore size to match an unworn or lightly honed cylinder
• 13.5:1 compression ratio matching factory ZX-12R specification
• Kit includes piston, rings, wrist pin, and circlips for a complete top-end refresh
• Precision-machined ring grooves for consistent sealing and oil control

Fits These Machines

• for Kawasaki ZX1200 Ninja ZX-12R

On-The-Job Use

• Top-end rebuilds after ring wear or compression loss
• Routine engine refresh on high-mileage ZX-12R sportbikes
• Track and street maintenance where factory compression must be retained

Specs At A Glance

Good To Know

Q: Is this piston kit a direct replacement for the factory piston? A: Yes, it is a standard-bore piston kit sized to factory 83 mm dimensions with the original 13.5:1 compression ratio, intended for cylinders in serviceable condition.

Q: Does the kit include everything needed for a top-end rebuild? A: It includes the piston, rings, wrist pin, and circlips. Gaskets, bearings, and machine work are not included and should be ordered separately as needed.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.