What is the main purpose of a top end bearing in a two-stroke engine?

The top end bearing, often referred to as a crank bearing, is crucial for supporting the crankshaft. It allows the crankshaft to spin freely while maintaining precise alignment within the engine case, which is essential for efficient operation and preventing premature wear.

Does this bearing come with any hardware or seals?

This product is for the top end bearing only. It does not include any additional hardware or seals. You will need to source those separately if your rebuild requires them.

How do I know if this bearing is the correct size for my engine?

This bearing has specific dimensions of 20mm inner diameter, 25mm outer diameter, and 22.8mm width. It's important to confirm these measurements match the specifications for your engine's crankshaft and crankcase to ensure a proper fit.

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Specifications

Brand: Wiseco
Part #: B1031
UPC: 193564104571

Wiseco 20 x 25 x 22.8mm Top End Bearing

Name: Wiseco 20 x 25 x 22.8mm Top End Bearing
Brand: Wiseco
Price: 23.54 USD
Availability: InStock

$23.54

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Wiseco 20 x 25 x 22.8mm Top End Bearing. Essential for two-stroke top-end rebuilds.

Key Features

Fits 117+ vehicle make/model combinations.
Bearing dimensions are 20mm inner diameter, 25mm outer diameter, and 22.8mm width.
Precision manufactured by leading bearing suppliers.
Each bearing is inspected for quality assurance.
A necessary component for two-stroke top-end rebuilds.

⚠️ 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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Product Details

When you're diving into a two-stroke top-end rebuild, getting the right parts is key. This Wiseco top end bearing, measuring 20 x 25 x 22.8mm, is a critical component for ensuring smooth operation and longevity of your engine's upper end. Wiseco, known for its forged two-stroke pistons, understands the importance of these small but vital parts.

This bearing is precision manufactured by leading suppliers and then inspected for quality, so you can be confident it meets the standards needed for a reliable rebuild. It's a necessary part for any two-stroke top-end overhaul, helping to support the crankshaft and maintain proper clearances.

This bearing fits a wide range of snowmobiles, including many Polaris 700 models and various Ski-Doo series like the MX Z and Summit. Make sure to check the full fitment list to confirm it's the right part for your specific machine.