Wiseco 01-05 Polaris Sportsman 90 .50mm Piston

SKU: WIS839M05250

Powersports Piston and Ring Kits

WIS Powersports Single Pistons...

Wiseco

Wiseco 01-05 Polaris Sportsman 90 .50mm Piston

SKU: WIS839M05250

Powersports Piston and Ring Kits

WIS Powersports Single Pistons...

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

We accept

Description

Wiseco's legacy is rooted in 2-stroke piston manufacturing and performance, dating over 80 years ago back to 1941. Today, Wiseco 2-stroke pistons are the result of decades of experience, incorporating the latest in 2-stroke piston manufacturing and design to deliver the performance Wiseco built its name on.

Product Overview

Wiseco 01-05 Polaris Sportsman 90 .50mm Piston

Product Details

Description:	Wiseco 01-05 Polaris Sportsman 90 .50mm Piston
Part Number:	wis839M05250

Part Type

Engine Piston

Data: v4.2 - Upd: 2026-10-13 16:58:58

Features

Dedicated forgings and additional lightening operations allow for optimized strength-to-weight ratio
Designed and built for each specific 2-stroke powersports engine
Engineered, forged, and machined in the USA in Mentor, OH
Improved tensile strength of forged material optimizes strength and service life
Includes high-quality piston ring(s), wrist pin(s), and circlips

Specifications

Product Attributes - Brand: Wiseco
Product Attributes - Manufacturer's Part Number: 839M05250
Product Attributes - Part Type: Powersports Piston and Ring Kits
Product Attributes - Product Line: Wiseco Powersports Piston Kits
Product Attributes - UPC: 00193564124074
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Bore (mm): 52.500mm
Product Attributes - Stroke: 41.90mm
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Wrist Pin Retainers Included: Yes
Product Attributes - Top Ring Material: Steel
Product Attributes - Top Ring Facing Material: Gas nitrided
Product Attributes - Second Ring Material: Cast iron
Product Attributes - Second Ring Facing Material: Cast iron
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Gaskets Included: No
Product Attributes - Quantity: Sold as a kit.

Reference Information

Brand Name/s	Wiseco
StreetFX SKU	wis839M05250
SFX Item ID	4064675
Supplier Item Code	4064675
Manufacturer SKU	839M05250
Manufacturer UPC	193564124074
Alternative References	.50mm