Why is a top end bearing important for a two-stroke rebuild?

The top end bearing supports the crankshaft and connects it to the connecting rod. In a two-stroke engine, this area experiences high rotational speeds and significant forces, making a well-built bearing crucial for smooth operation and preventing premature wear.

What does the '12 x 15 x 14.5mm' measurement refer to?

These measurements refer to the bearing's dimensions: 12mm is the inside diameter (where it fits on the crankshaft), 15mm is the outside diameter, and 14.5mm is the width of the bearing.

Does this bearing come with any hardware for installation?

This product is for the top end bearing only. Installation hardware, such as crankcase seals or gaskets, is typically sold separately and should be checked against your vehicle's service manual.

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Specifications

Brand: Wiseco
Part #: B1041
UPC: 193564104625

Wiseco 12 x 15 x 14.5mm Top End Bearing

Name: Wiseco 12 x 15 x 14.5mm Top End Bearing
Brand: Wiseco
Price: 23.54 USD
Availability: InStock

$23.54

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Wiseco 12 x 15 x 14.5mm Top End Bearing. Essential for two-stroke top-end rebuilds.

Key Features

Fits 2001-2022 KTM 50cc models, 2017-2022 Husqvarna TC50, and 2021-2022 Gas Gas MC 50.
Measures 12mm inside diameter, 15mm outside diameter, and 14.5mm width.
Manufactured by leading bearing suppliers.
Inspected for quality by Wiseco.
Essential 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

If you're rebuilding the top end of your two-stroke, this Wiseco top end bearing is a critical component. It's a 12 x 15 x 14.5mm bearing, specifically designed to handle the high speeds and loads in the upper part of your engine. Wiseco, known for their forged pistons, understands how important a well-built bearing is for the longevity of your rebuild.

This bearing is manufactured by leading bearing suppliers and then inspected by Wiseco to ensure it meets their standards. It's a necessary part for any two-stroke top-end rebuild, helping to ensure smooth operation and durability. This part fits a range of popular 50cc dirt bikes, including models from KTM, Husqvarna, and Gas Gas.