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

A top-end bearing, often part of the crankshaft assembly, allows the crankshaft to rotate smoothly within the engine case. It's crucial for reducing friction and wear in the high-speed environment of a two-stroke engine's top end.

Are these bearings made by Wiseco directly?

Wiseco partners with leading bearing suppliers for the manufacturing of these top-end bearings. They are then inspected for quality by Wiseco to ensure they meet their standards.

What does '24 x 29 x 23.8mm' refer to on this bearing?

These measurements refer to the bearing's dimensions. The 24mm is the inner diameter (where the shaft fits), the 29mm is the outer diameter (where it fits into the engine case), and 23.8mm is the width of the bearing itself.

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Specifications

Brand: Wiseco
Part #: B1091
UPC: 193564104748

Wiseco 24 x 29 x 23.8mm Top End Bearing

Name: Wiseco 24 x 29 x 23.8mm Top End Bearing
Brand: Wiseco
Price: 23.54 USD
Availability: InStock

$23.54

On Backorder

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Wiseco 24 x 29 x 23.8mm Top End Bearing. Essential for two-stroke top-end rebuilds.

Key Features

Fits 23+ vehicle combinations.
Bearing dimensions are 24mm inner diameter, 29mm outer diameter, and 23.8mm width.
Manufactured by leading bearing suppliers.
Each bearing is inspected for quality.
Essential 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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Will this fit your vehicle?

Product Details

With its 24mm inner diameter, 29mm outer diameter, and 23.8mm width, this top-end bearing from Wiseco is a critical component for any two-stroke engine rebuild. Wiseco, known for its forged pistons, understands the importance of reliable bearings in the high-stress environment of a top-end assembly. This bearing is manufactured by leading suppliers and undergoes rigorous inspections to ensure it meets the necessary quality standards for your engine.

When you're putting your top end back together, especially on models like the Arctic Cat King Cat or ZR series, using a well-made bearing is essential for smooth operation and longevity. This part is a must-have for ensuring the crankshaft and connecting rod assembly can rotate freely and without excessive wear. It's a small part that plays a big role in the overall health of your engine.