What components are included in this Wiseco piston kit?

This Wiseco piston kit includes the forged piston, high-quality piston rings, the necessary wrist pin(s), and circlips. It's designed to provide the essential parts for a top-end rebuild.

Why choose a forged piston over a cast piston?

Forged pistons are made by shaping aluminum under extreme pressure, which creates a denser, stronger material with improved tensile strength. This makes them more resistant to heat and stress, leading to better performance and a longer service life, especially in demanding applications.

Is this piston kit CARB approved for California?

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

Wiseco Forged Piston Kit 40050M08850 - Honda TRX420 Rancher

Name: Wiseco 07-19 Honda TRX420 Rancher 8850XX Piston
Brand: Wiseco
Price: 209.99 USD
Availability: InStock

Wiseco 07-19 Honda TRX420 Rancher 8850XX Piston

$209.99

Only 1 left in stock

Wiseco 88.50mm forged piston kit for 07-21 Honda TRX420 Rancher models. Includes rings, pin, and circlips for improved strength.

Key Features

Fits 2007-2021 Honda TRX420 Rancher models.
Piston bore size is 88.50 mm.
Forged aluminum construction offers improved tensile strength for better durability.
Includes piston rings, wrist pin(s), and circlips for a complete kit.
Designed and machined in the USA to tight tolerances.
Optimized strength-to-weight ratio for specific 4-stroke powersports engines.

⚠️ 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 the top end of your Honda TRX420 Rancher, you want a piston that's built to last and perform. This Wiseco 4-stroke forged piston kit is designed specifically for your machine, offering a solid upgrade over stock. It comes complete with high-quality piston rings, a wrist pin, and circlips, so you have everything you need for a complete installation.

Wiseco uses a forged aluminum material for these pistons, which gives them improved tensile strength compared to cast pistons. This means they can handle more stress and heat, leading to better reliability and a longer service life in your ATV's engine. Each piston is forged and machined in the USA to tight tolerances, ensuring a precise fit and optimized strength-to-weight ratio for your specific TRX420 application. This kit is a well-built option for riders looking for dependable performance.

This piston kit fits a wide range of Honda TRX420 Rancher models from 2007 through 2021, including popular variants like the Rancher 4x4 ES and Rancher AT with Power Steering. Make sure to check the full fitment list to confirm compatibility with your specific model year and trim.