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, ensuring efficient engine operation.

Are these bearings made by Wiseco?

Wiseco sources these main bearings from many of the same suppliers that produce parts for original equipment manufacturers (OEMs). This ensures they meet the same high standards for accuracy and reliability.

What else might I need when installing main bearings?

When replacing main bearings, it's often recommended to also inspect and potentially replace crankshaft seals, oil pump components, and to use fresh engine oil and a new oil filter. Always refer to the manufacturer's service manual for complete installation procedures and recommended parts.

Wiseco Main Bearing Kit (2) 35 x 72 x 17mm

Specifications

Brand: Wiseco
Part #: BK5066
UPC: 193564104328

Wiseco Main Bearing Kit (2) 35 x 72 x 17mm

Name: Wiseco Main Bearing Kit (2) 35 x 72 x 17mm
Brand: Wiseco
Price: 176.60 USD
Availability: InStock

$176.60

On Backorder

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

Wiseco Main Bearing Kit (2) 35 x 72 x 17mm. Manufactured by OEM suppliers for reliable engine service.

Key Features

Fits 2021-2024 Gas Gas EX 450F, 2016-2025 Husqvarna FC450, 2016-2025 KTM 450 SX-F, and many other Gas Gas, Husqvarna, and KTM models.
Manufactured by the same suppliers to OEMs, including leading Japanese manufacturers.
Precision machined and finished with high-quality materials.
Inspected for accuracy, function, and cleanliness for reliable service.
Includes two main bearings with dimensions of 35mm x 72mm x 17mm.

⚠️ 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

If you're rebuilding the engine in your Gas Gas EX 450F, Husqvarna FC450, or KTM 450 SX-F, this Wiseco Main Bearing Kit is a solid option. These bearings are crucial for supporting the crankshaft and ensuring it spins smoothly within the engine block. Wiseco sources these bearings from many of the same manufacturers that supply the original equipment manufacturers, meaning you're getting parts built to the same standards.

Each bearing in this kit is precision machined and inspected for accuracy, function, and cleanliness. This attention to detail is important because main bearings handle significant loads and need to be perfect to ensure efficient and reliable engine operation. The kit includes two main bearings, each measuring 35mm inner diameter, 72mm outer diameter, and 17mm width, designed to fit a wide range of performance motorcycles.