WSM - 50-300-05PK - Piston Kit - +.50 mm - Polaris

Q: Where can I find installation instructions for this product?

General installation notes are provided on the product page where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat for questions about difficulty, required tools, or whether professional installation is recommended.

The WSM 50-300-05PK is a +0.50 mm oversize aluminum piston kit for 1986-2006 Polaris ATVs including the Trail Boss 250 RES 4x2, Trail Blazer 250 ES, and Trail Boss 250 4x4, using a nonabrasive MOS2 coating that reduces heat and friction while specially hardened ring groove tops add strength and durability.

Features

Quality and construction that meets or exceeds OEM

Feature improved E-clip design

Contain piston, rings, pin and clips

Additional rings available separately

Order one per cylinder

Skirts have a nonabrasive, expansion-retarding MOS2 coating to reduce heat and friction for added power and longevity

MOS2 coating actually draws heat through piston walls and out the bottom

Specially hardened tops add strength to ring grooves

Specs

Product Name: Piston Kit

Model: Original

Piston Material: Aluminum

Bore Size Metric: 72.50 mm

Bore - Oversize: +0,50 mm

Bore - Oversize Metric: +0.50 mm

Units: Kit

Riding Style: ATV

Frequently Asked Questions - WSM - 50-300-05PK - Piston Kit - +.50 mm - Polaris

General info

How do I know if this part fits my vehicle?

Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.

What does it mean if a product is listed as universal fit?

Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.

Where can I find installation instructions for this product?

General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.

What if I have more questions about this product?

Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.