What is the purpose of a piston pin?

The piston pin, also known as a wrist pin, is a crucial component that connects the piston to the connecting rod. This connection allows the piston's linear motion to be converted into the connecting rod's rotational motion, which ultimately drives the crankshaft.

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

A superfinished outer diameter means the surface of the pin has been treated to be extremely smooth. This advanced surface finish helps to minimize friction and wear where the pin contacts the piston, contributing to a longer lifespan and more efficient engine operation.

Does this piston pin come with everything needed for installation?

Yes, this Wiseco piston pin includes the necessary retaining clips to secure it in place within the piston and connecting rod assembly. Always refer to your vehicle's service manual for specific installation procedures.

Wiseco 19mm x 2.500in NonChromed SW Piston Pin

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Specifications

Brand: Wiseco
Part #: S376
UPC: 193564121639

Wiseco 19mm x 2.500in NonChromed SW Piston Pin

Name: Wiseco 19mm x 2.500in NonChromed SW Piston Pin
Brand: Wiseco
Price: 22.55 USD
Availability: InStock

$22.55

On Backorder

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

Fits 1989-1999 Yamaha YFM350FW Big Bear 4x4. Wiseco piston pin connects piston to connecting rod for reliable engine operation.

Key Features

Fits 1989-1999 Yamaha YFM350FW Big Bear 4x4 and 1996-1999 Yamaha YFM350U Big Bear 2x4.
Connects the piston to the connecting rod for reliable engine operation.
Features a 19.00 mm outer diameter and a 12.00 mm inner diameter.
Measures 63.50 mm in length.
Has a superfinished outer diameter to help reduce friction and wear.
Includes retaining clips for secure installation.

⚠️ 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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Fits these vehicles

Yamaha YFM350FW Big Bear 4x4 1989-1999
Yamaha YFM350U Big Bear 2x4 1996-1999

Product Details

This Wiseco piston pin is what connects your piston to the connecting rod, letting your engine's moving parts work together smoothly. It's a critical piece for ensuring your engine runs efficiently and reliably, especially when you're rebuilding or looking to replace worn components on your 1989-1999 Yamaha YFM350FW Big Bear 4x4 or 1996-1999 Yamaha YFM350U Big Bear 2x4.

This particular pin measures 19mm on the outside and 12mm on the inside, with a total length of 63.50mm. It features a superfinished outer diameter, which helps reduce friction and wear between the pin and the piston. Wiseco makes these pins strong and lightweight, aiming for maximum efficiency in your piston assembly. They also include retaining clips to keep everything securely in place.