What is the main function of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while handling the immense forces generated during combustion, reducing friction and wear.

Are these bearings a direct replacement for the stock bearings?

Yes, these bearings are manufactured to meet or exceed OEM specifications and are designed as a direct fit replacement for the specified Kawasaki and Suzuki models.

What does it mean that they are manufactured by the same suppliers as OEMs?

This indicates that the bearings are produced by companies that also supply parts directly to motorcycle manufacturers. This often means they adhere to similar quality control and material standards as original equipment parts.

Wiseco Main Bearing Kit (2) 30 x 62 x 16mm

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Specifications

Brand: Wiseco
Part #: BK5041
UPC: 193564104229

Wiseco Main Bearing Kit (2) 30 x 62 x 16mm

Name: Wiseco Main Bearing Kit (2) 30 x 62 x 16mm
Brand: Wiseco
Price: 49.02 USD
Availability: InStock

$49.02

On Backorder

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

Fits 2004-2021 Kawasaki KX250F. Wiseco Main Bearing Kit (2) 30 x 62 x 16mm. Ensures efficient and reliable engine service.

Key Features

Fits 2004-2021 Kawasaki KX250F, 2019-2025 Kawasaki KX250, 2021-2025 Kawasaki KX250X, and 2004-2009 Suzuki RMZ250.
Each bearing measures 30mm inner diameter, 62mm outer diameter, and 16mm width.
Manufactured by the same suppliers that produce parts for OEMs, including leading Japanese manufacturers.
Precision machined and finished with high-quality materials.
Inspected for accuracy, function, and cleanliness to ensure reliable engine 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

With dimensions of 30mm inner diameter, 62mm outer diameter, and 16mm width, these Wiseco main bearings are built to precise specifications for your engine. They are manufactured by many of the same suppliers that provide parts to Original Equipment Manufacturers, including leading Japanese companies, ensuring a high standard of production. Each bearing is carefully inspected for accuracy, proper function, and cleanliness before it leaves the factory, which is crucial for smooth and dependable engine operation.

When you're rebuilding or repairing your engine, using well-made bearings like these from Wiseco helps ensure that your crankshaft spins true and with minimal friction. This attention to detail in manufacturing and inspection translates to reliable service and helps maintain the integrity of your engine's rotating assembly.