Upgrade your 2003, 2004, or 2005 Yamaha YZ450F with the Hot Rods 4050 Stroker Crankshaft, a complete replacement crankshaft designed to deliver dependable performance and increased engine displacement. This crankshaft is a premier alternative to a costly OEM replacement and is supplied ready for installation with Hot Rods connecting rods, top-end bearings, and crankshaft webs.
Each Hot Rods 4050 crankshaft is factory assembled and trued to OEM specifications to meet or surpass original-equipment standards for performance and durability. The stroker design increases engine stroke for improved displacement and horsepower, while CNC machining and dynamic balancing support smooth, reliable operation. In most applications, this crankshaft installs as a drop-in replacement without engine modifications and can use the stock piston.
Feature: Complete crankshaft assembly with Hot Rods connecting rod, top-end bearings, and crankshaft webs
Feature: Stroker design increases displacement and horsepower
Feature: Factory assembled and trued to OEM specifications
Feature: CNC machined and dynamically balanced for the increased stroke
Feature: Uses the stock piston in most applications
Feature: Fully rebuildable with genuine Hot Rods connecting rods and bearings
Feature: Gears manufactured to DIN Class 9 or higher quality standards
Feature: Can be matched with Cylinder Works Big Bore cylinders for additional displacement and horsepower gains
The Hot Rods manufacturer part number and vendor part number for this crankshaft are both 4050. It fits the 2003, 2004, and 2005 Yamaha YZ450F. Verify motorcycle year, model, and engine configuration before ordering to ensure proper fitment.
Features:
- Complete crankshaft assembly with Hot Rods connecting rod, top-end bearings, and crankshaft webs
- Stroker design increases displacement and horsepower
- Factory assembled and trued to OEM specifications
- CNC machined and dynamically balanced for the increased stroke
- Uses the stock piston in most applications
- Fully rebuildable with genuine Hot Rods connecting rods and bearings
- Gears manufactured to DIN Class 9 or higher quality standards
- Compatible with Cylinder Works Big Bore cylinders for additional displacement and horsepower gains
- Fits 2003–2005 Yamaha YZ450F models
- Manufacturer part number: 4050
- Vendor part number: 4050
Fitment:
2003 Yamaha YZ450F
2004 Yamaha YZ450F
2005 Yamaha YZ450F