Upgrade the bottom end of your Yamaha YZ250F with the Hot Rods 4049 Stroker Crankshaft. Designed as a high-quality alternative to a costly OEM crankshaft, this complete assembly is ready for installation and engineered to deliver dependable performance and durability. It fits 2003 through 2012 Yamaha YZ250F models and provides increased stroke for greater engine displacement and horsepower.
The Hot Rods 4049 crankshaft is factory assembled and trued to OEM specifications. It includes proven Hot Rods connecting rods, top-end bearings, and crankshaft webs, giving you a complete replacement solution for engine rebuilding or performance upgrades. CNC machining and dynamic balancing support the increased stroke, while the drop-in design requires no modification in most applications. The crankshaft also uses the stock piston in most applications and can be paired with Cylinder Works Big Bore cylinders for additional displacement and power gains.
Built for long-term service, this Hot Rods crankshaft is fully rebuildable with genuine Hot Rods connecting rods and bearings. Its precision-manufactured gears are produced to DIN Class 9 or higher quality standards. This assembly is intended for riders and technicians seeking reliable OEM-level fit and performance with the added benefits of a stroker configuration.
Fitment: 2003 Yamaha YZ250F, 2004 Yamaha YZ250F, 2005 Yamaha YZ250F, 2006 Yamaha YZ250F, 2007 Yamaha YZ250F, 2008 Yamaha YZ250F, 2009 Yamaha YZ250F, 2010 Yamaha YZ250F, 2011 Yamaha YZ250F, and 2012 Yamaha YZ250F. Manufacturer and vendor part number: Hot Rods 4049.
Features:
- Stroker crankshaft increases engine stroke for greater displacement and horsepower
- Complete Hot Rods assembly includes connecting rods, top-end bearings, and crankshaft webs
- Factory assembled and trued to OEM specifications
- Drop-in replacement design requires no modification in most applications
- CNC machined and dynamically balanced for stroker applications
- Uses the stock piston in most applications
- Fully rebuildable with genuine Hot Rods connecting rods and bearings
- DIN Class 9 or higher gear quality
- Compatible with Cylinder Works Big Bore cylinders for additional displacement and horsepower gains
- Fits 2003–2012 Yamaha YZ250F models
Fitment:
2003 Yamaha YZ250F
2004 Yamaha YZ250F
2005 Yamaha YZ250F
2006 Yamaha YZ250F
2007 Yamaha YZ250F
2008 Yamaha YZ250F
2009 Yamaha YZ250F
2010 Yamaha YZ250F
2011 Yamaha YZ250F
2012 Yamaha YZ250F
2013 Yamaha YZ250F