TOP END REBUILD KITS WILL COME WITH PRECISION MATCHED PISTONS, RINGS, CIRCLIPS, WRIST PINS, AND A TOP END GASKET KIT FOR 1 MOTOR. PISTONS KITS ARE SOLD PER CYLINDER AND WILL INCLUDE PRECISION MATCHED PISTONS, RINGS, AND CIRCLIP. PRO-LITE SERIES PISTONS WILL INCLUDE WRIST PIN.
The WISECO Standard Bore Piston Kit, part number 2476M08500, is designed for select Polaris Patriot Boost snowmobile applications. This piston kit is sold per cylinder and includes a precision-matched piston, rings, and circlip. The Pro-Lite Series piston also includes a wrist pin.
Each WISECO piston is forged from high-silicon, low-expansion aluminum to provide strength, reduced weight, improved heat transfer, and long service life. A diamond-turned finish produced on CNC-controlled turning centers is designed to deliver a consistent finish with minimal size variation.
The piston can be installed in cylinder bore compositions including cast iron, chrome, Nikasil, and boron composite. WISECO also offers oversize pistons for cast iron-lined cylinders, while replacement cylinder sleeves can allow chrome, Nikasil, and boron composite cylinders to be resleeved for WISECO oversizes.
This kit fits the 2023 and 2024 Polaris Indy VR1 Patriot Boost 137-inch and 129-inch models, as well as select 2025 Polaris Patriot Boost models, including the RMK Khaos 155-inch, Switchback Assault 146-inch, Indy VR1 137-inch, and Indy VR1 Dynamix 137-inch.
Features:
- Forged high-silicon, low-expansion aluminum construction
- Designed for strength, reduced weight, improved heat transfer, and long service life
- Diamond-turned finish produced with CNC-controlled manufacturing equipment
- Precision-matched piston, rings, and circlip included per cylinder
- Pro-Lite Series piston includes a wrist pin
- Compatible with cast iron, chrome, Nikasil, and boron composite cylinder bore compositions
- Fits select 2023–2025 Polaris Patriot Boost snowmobile applications
Fitment:
2023 Polaris Indy VR1 Patriot Boost 129"
2023 Polaris Indy VR1 Patriot Boost 137"
2024 Polaris Indy VR1 Patriot Boost 137"
2025 Polaris Patriot Boost Indy VR1 137"
2025 Polaris Patriot Boost Indy VR1 Dynamix 137"
2025 Polaris Patriot Boost RMK Khaos 155"
2025 Polaris Patriot Boost Switchback Assault 146"
