Yamaha YZ 450 F Stroker Crankshaft - Hot Rods - `06-`09 is a complete, factory-assembled stroker crankshaft kit engineered for 2006–2009 YZ450F models. It increases displacement and enhances midrange torque and overall power delivery without requiring extensive engine modification in most applications.

Sold ready for installation with proven Hot Rods connecting rods, top end bearings and crankshaft webs, this crankshaft is trued and balanced to OEM specifications. Most applications accept the unit with stock pistons unless otherwise noted, making it a straightforward upgrade for riders focused on improved low- and mid-range performance while maintaining durability. Manufactured to high material standards (DIN Class 9 or higher), the assembly is designed for dependable operation when installed and maintained correctly.

Features

• Complete, factory-assembled stroker crankshaft kit for '06–'09 YZ450F
• Includes Hot Rods connecting rods, top end bearings and crankshaft webs
• Trued and balanced to OEM specifications
• Typically compatible with stock pistons (unless noted)
• High-quality DIN Class 9 or higher materials

If you have questions or need help confirming fitment, call us directly — we're happy to assist. We offer installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. Our phones: 512-982-9393 (TX), 562-981-6800 (CA). If you are considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

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