Yamaha YFZ 450 Bottom End Kit - Hot Rods - `04-`09. A complete bottom end rebuild kit designed for 2004–2009 Yamaha YFZ 450 models, supplying the core components needed to restore crankcase performance.

This Hot Rods kit brings together the crankshaft, main bearings and seals, plus a full top and bottom end gasket kit with all required seals in one convenient box. It reduces parts sourcing time and simplifies installation for enthusiasts performing a rebuild or refresh. A stroker crankshaft option is available for some model years — check compatibility before ordering. This kit is a practical, cost-conscious alternative to buying individual OEM parts.

Features

• Complete bottom end package: crankshaft, main bearings and seal kit
• Full top and bottom end gasket set with seals included
• Fits Yamaha YFZ 450 models 2004–2009
• Stroker crank option available on select years (verify fitment)
• Saves time and often money compared to sourcing OEM parts separately

If you have questions or need help confirming fitment, call us directly — our tech staff can assist. We have two locations where we offer installation and customization services: Austin, Texas and the Los Angeles, California area. Call Austin at 512-982-9393 (TX) or Los Angeles at 562-981-6800 (CA).

If you are considering purchasing multiple items, contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov