What is the compression ratio of this Wiseco piston?

This Wiseco piston features an 11:1 compression ratio. This is an increase over stock, which can lead to improved engine performance and power output.

What components are included in this piston kit?

The kit includes the forged piston itself, along with high-quality piston rings, a wrist pin, and circlips. These are the essential parts needed for installing the new piston.

Can this piston be shipped to California?

No, this piston is not CARB approved and cannot be shipped to California due to emissions regulations.

Wiseco 87-13 Yamaha YFM350 Warrior/Raptor 11:1 CR Piston

Specifications

Brand: Wiseco
Part #: 40109M08350
UPC: 193564124678

Wiseco 87-13 Yamaha YFM350 Warrior/Raptor 11:1 CR Piston

Name: Wiseco 87-13 Yamaha YFM350 Warrior/Raptor 11:1 CR Piston
Brand: Wiseco
Price: 209.99 USD
Availability: InStock

$209.99

On Backorder

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

Fits 1987-2004 Yamaha YFM350X Warrior. Wiseco 11:1 CR forged piston kit for improved performance and strength.

Key Features

1987-2004 Yamaha YFM350X Warrior, 2005-2013 Yamaha YFM350 Raptor, 1989-1999 Yamaha YFM350FW Big Bear 4x4, and 2007-2014 Yamaha YFM350 Grizzly 4x4 Auto fitment.
Forged material offers improved tensile strength for better durability and service life.
Designed and built for specific 4-stroke powersports engines.
Dedicated forgings help optimize the strength-to-weight ratio.
Includes high-quality piston rings, wrist pin(s), and circlips.
Forged and machined in the USA.

⚠️ 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

If you're rebuilding the top end of your 1987-2004 Yamaha YFM350X Warrior, consider this forged piston kit from Wiseco. This piston is designed to replace the original and offers an 11:1 compression ratio, which can give your engine a noticeable boost in power and responsiveness.

Wiseco starts with a dedicated forging for each specific 4-stroke powersports engine, which means the material is shaped to optimize strength and reduce weight. This process results in improved tensile strength, making the piston more durable and ready for the demands of your Warrior. The kit includes high-quality piston rings, a wrist pin, and circlips, so you have the essential components needed for installation. Everything is forged and machined in the USA.

This piston is a solid option for anyone looking to restore or enhance their YFM350's engine performance. Remember that this part is not CARB approved and cannot be shipped to California.