# Wiseco Yamaha YFM350 Warrior/Raptor 87-13 121 CR Piston Kit

The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.

-   Complete Package: Each piston includes a wrist pin, rings, and circlips, providing everything needed for installation
-   Forged Material: Optimizes strength and service life, ensuring durability under high-stress conditions
-   Performance-Enhancing Features: Varied across applications to maximize both durability and power
-   Improved tensile strength of forged material optimizes strength and service life
-   Designed and built for each specific 4-stroke powersports engine
-   Dedicated forgings allow for optimized strength-to-weight ratio
-   Includes high-quality piston rings, wrist pin(s), and circlips
-   Engineered, forged, and machined in the USA in Mentor, OH
-   84.00 mm Bore, 12:1 CR

This Part Fits:

Year

Make

Model

Submodel

2004-2006

Yamaha

YFM350 Bruin Auto 2x4

Base

2007-2014

Yamaha

YFM350 Grizzly 4x4 Auto

Base

2007-2014

Yamaha

YFM350 Grizzly Auto

Base

2007-2012

Yamaha

YFM350 Grizzly IRS 4x4 Auto

Base

2005-2013

Yamaha

YFM350 Raptor

Base

2004-2006

Yamaha

YFM350FA Bruin Auto 4x4

Base

1989-1999

Yamaha

YFM350FW Big Bear 4x4

Base

1996-1999

Yamaha

YFM350U Big Bear 2x4

Base

1987-2004

Yamaha

YFM350X Warrior

Base

## Details

- **Price:** 318.76 CAD
- **Vendor:** Wiseco
- **Type:** Piston Sets - Powersports

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 318.76 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- Photo - out of package
- User 1
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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wiseco-yamaha-yfm350-warrior-raptor-87-13-121-cr-piston-kit-1)
> Updated: 2026-07-14