What is the main function of a main bearing in an engine?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while handling the forces generated during combustion and power transfer, ensuring proper engine operation.

Are these bearings made to OEM specifications?

Yes, these Wiseco main bearings are manufactured by many of the same suppliers that produce parts for original equipment manufacturers, including leading Japanese companies. They are inspected for accuracy and function.

What does the '30 x 62 x 20mm' measurement refer to?

These measurements refer to the bearing's dimensions. The 30mm is the inner diameter (where it fits the crankshaft), the 62mm is the outer diameter (where it fits the engine case), and the 20mm is the width of the bearing itself.

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Specifications

Brand: Wiseco
Part #: B5044
UPC: 193564103987

Wiseco 30 x 62 x 20mm Main Bearing

Name: Wiseco 30 x 62 x 20mm Main Bearing
Brand: Wiseco
Price: 39.21 USD
Availability: InStock

$39.21

On Backorder

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

Fits 2000-2006 KTM 300 EXC. Wiseco 30 x 62 x 20mm Main Bearing. Precision machined for reliable engine service.

Key Features

Fits 2000-2006 KTM 300 EXC, 1997-2002 KTM 250 EXC, 1997-2002 KTM 250 SX, and 2000-2005 KTM 300 MXC.
Features a 30mm inner diameter, 62mm outer diameter, and 20mm width.
Manufactured by the same suppliers that produce parts for leading OEMs, including Japanese manufacturers.
Precision machined and finished for accurate fit and function.
Inspected for accuracy, function, and cleanliness to ensure reliable service.

⚠️ 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

Starting with a 30mm inner diameter, 62mm outer diameter, and a 20mm width, this Wiseco main bearing is built to precise specifications for your KTM. These bearings are made by many of the same suppliers that provide parts to original equipment manufacturers, including top Japanese companies. That means you're getting a well-made component that's ready to get your engine running smoothly again.

Each bearing is carefully inspected for accuracy, proper function, and cleanliness before it leaves the factory. This attention to detail ensures that the bearing will perform efficiently and reliably in your engine. It's a solid option for anyone rebuilding or repairing their KTM's engine, helping to ensure smooth rotation and proper crankshaft support.