What is the purpose of a wrist pin?

A wrist pin, also known as a piston pin, connects the piston to the connecting rod. It allows the connecting rod to pivot as the piston moves up and down, transferring the combustion force to the crankshaft.

What does 'Superfinished Outer Diameter' mean for this pin?

Superfinishing is an advanced surface treatment that creates an extremely smooth and precise finish on the outer diameter of the pin. This helps reduce friction and wear where the pin contacts the piston and connecting rod, promoting longer component life.

Is this piston pin compatible with all Wiseco pistons?

This piston pin has specific diameter and length measurements (20mm OD, 12mm ID, 50.44mm length). You must verify these dimensions match the requirements of your specific Wiseco piston and connecting rod combination for proper fitment and function.

Wiseco 20mm x 1.986in NonChromed SW Piston Pin

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Specifications

Brand: Wiseco
Part #: S641
UPC: 193564122582

Wiseco 20mm x 1.986in NonChromed SW Piston Pin

Name: Wiseco 20mm x 1.986in NonChromed SW Piston Pin
Brand: Wiseco
Price: 19.95 USD
Availability: InStock

$19.95

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wiseco 20mm x 1.986in NonChromed SW Piston Pin. Essential for securing your piston assembly during engine rebuilds.

Key Features

Fits 16+ vehicle make/model combinations.
20.00 mm outer diameter, 12.00 mm inner diameter, 50.44 mm length.
Superfinished outer diameter for smooth operation.
Designed to keep piston assemblies secure during engine operation.
Part of Wiseco's range of performance engine components.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

When you're rebuilding an engine, keeping the piston securely attached to the connecting rod is critical. This Wiseco wrist pin is designed to do just that, ensuring your piston assembly stays aligned and functions correctly, even under tough conditions. It's a well-built component that helps you get your performance rebuild done right.

This pin measures 20mm in outer diameter, with a 12mm inner diameter, and is 50.44mm long. It features a superfinished outer diameter for smooth operation. Wiseco is known for its performance accessories, and this wrist pin is part of a range that helps mechanics complete their engine projects with confidence. It's a solid option for anyone looking to ensure their engine's internal components are properly secured.

This part fits a wide variety of vehicles, including many KTM, Kawasaki, Polaris, and Yamaha models. Always check the fitment details to confirm it's the right pin for your specific application.