RZR Big Bore Replacement Piston Kit, 787cc (81.5mm) 11:1 comp

Kroyer Racing Engines 81.5 mm Big Bore CP Piston Kit for Polaris RZR,
(also fits Sportsman 800 Motor).

Your stock Polaris motor is only 760cc. These big bore pistons will increase the bore size from a mere 760cc to 787cc for increased power and torque.
Pistons designed exclusively by Kroyer Racing Engines, manufactured by CP Pistons and distributed solely by Holz Racing Products.

Piston Features
Each big bore piston is exclusively designed by Kroyer Racing engines and machined from designated forgings on a state of the art 5-axis machine and is 45 grams lighter than the OEM pistons and 5 grams lighter than the closest competitor’s pistons.
- Dry Film Lubrication Coating on piston skirts for increased longevity and reduced friction.
- Oversized Valve Pockets designed to work with oversized valves.
- WPC hard treated wrist pins for extreme durability.
- Double Pin Oilers provide twice as much lubrication to the wrist pin.
- Anti Detonation Grooves limit the piston/cylinder contact during high temp and RPM.
- Accumulator Groove collects excess blow by and residual gases during combustion and alleviates top ring flutter while increasing ring seal.
- X-Forging. This design enables the use of a shorter pin for added strength and overall weight savings.
- Optimized Cam and Barrel= Tighter clearances; Less noise; Better ring seal; More power; Increased durability.

Each Kit includes 2 pistons with rings, wrist pins and circlips

Designed to run on 91 octane pump fuel – Will work with stock head and valve train, but are designed to work with Kroyer Racing Engines head and valve train upgrades.

• Requires boring and re-plating cylinder