What specific components are included in this bottom end kit?

This Wiseco kit contains a complete crankshaft assembly, main bearings, and a comprehensive set of bottom-end gaskets and seals for your Yamaha YZ250.

Are the bearings in this kit high quality?

Yes, the main bearings and rod bearings included in this kit are specified as OEM quality, which helps ensure smooth operation and reliable longevity for your engine.

What is the benefit of the connecting rod treatment?

The connecting rod is copper-plated, heat-treated, and shot-peened. This process helps to remove residual stress and smooth the surface, contributing to its overall durability and performance.

Wiseco 99-19 Yamaha YZ250 Bottom End Gasket Kit

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Specifications

Brand: Wiseco
Part #: WB1051
UPC: 193564115515

Wiseco 99-19 Yamaha YZ250 Bottom End Gasket Kit

Name: Wiseco 99-19 Yamaha YZ250 Bottom End Gasket Kit
Brand: Wiseco
Price: 63.74 USD
Availability: InStock

$63.74

On Backorder

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

Fits 1999-2020 Yamaha YZ250. This Wiseco bottom end kit includes a crankshaft, main bearings, and all necessary gaskets for a complete rebuild.

Key Features

Fits 1999-2020 Yamaha YZ250 and 2016-2020 Yamaha YZ250X.
Includes a complete crankshaft assembly, main bearings, and a full bottom-end gasket and seal kit.
Gaskets are manufactured by leading suppliers and meet OEM quality standards.
Connecting rod is copper-plated, heat-treated, and shot-peened for reduced stress and a smooth surface.
Precision machined crank webs contribute to ultimate strength.
Main bearings and rod bearings are OEM quality for smooth operation and reliable longevity.

⚠️ 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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Fits these vehicles

Yamaha YZ250 1999-2020
Yamaha YZ250X 2016-2020

Product Details

When you're rebuilding the bottom end of your 1999-2020 Yamaha YZ250, getting all the right parts in one place saves a lot of hassle. This kit from Wiseco bundles a complete crankshaft assembly, main bearings, and a full set of bottom-end gaskets and seals. It’s designed to give you everything you need for a reliable rebuild, all under a single part number.

Wiseco sources their gaskets from leading suppliers, ensuring they meet OEM quality standards for a dependable seal. The crankshaft itself is precision machined for strength and durability, with a connecting rod that's copper-plated, heat-treated, and shot-peened to reduce stress and smooth out the surface. The included main and rod bearings are also OEM quality, contributing to smooth operation and long-lasting performance.