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Engines and Components› Connecting Rods and Components
Wiseco
Wiseco, Crankshaft Kit, Yamaha YZ250 '03-19
SKU: W00C WPC134
Advanced — 4+ hours
Overview
The crankshaft itself is constructed from forged 8620 steel, with rod bores case-hardened to 58-62 RC for optimized bearing surfaces. The double-drilled small ends of the connecting rod provide extra lubrication and cooling for the piston pin, reducing distortion. Silver-coated bronze phosphor thrust washers are included to increase oil retention and reduce friction. This kit ensures maximum performance and bearing life for your Yamaha motorcycle.
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Part #: WPC134
Wiseco's bottom-end rebuild kits help save time and money for your dirt bike, ATV, or UTV bottom-end rebuild. Available for many popular applications, these kits contain a crankshaft assembly, main bearings, and a bottom-end gasket kit, all in one box under one part number.
Features:
- Includes complete crankshaft assembly, main bearings, and complete bottom-end gasket and seal kit in one box
- Elevated engineering and quality control measures to ensure reliable service
- OEM quality main bearings and rod bearings for smooth operation and reliable longevity
- Precision machined crank webs for ultimate strength and durability
- Copper-plated, heat-treated, and shot-peened connecting rod to remove residual stress and smooth surface blends
Wiseco, Crankshaft Kit, Yamaha YZ250 '03-19
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Wiseco |
| Part Number | W00C WPC134 |
Videos
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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