Hot Rods 4174 Stroker Crankshaft for 2006-2009 Yamaha YZ450F

Upgrade your 2006-2009 Yamaha YZ450F with the Hot Rods 4174 Stroker Crankshaft, a performance-focused replacement designed to increase engine displacement and horsepower. This complete crankshaft assembly is supplied ready for installation and includes proven Hot Rods connecting rods, top-end bearings, and crankshaft webs. It is factory assembled and trued to OEM specifications to deliver dependable fit, performance, and durability.

The Hot Rods 4174 uses increased stroke to produce greater displacement while maintaining a practical drop-in design that requires no modification in most applications. The crankshaft is CNC machined and dynamically balanced to support the extended stroke, and it uses the stock piston in most applications. For additional engine performance, it can be paired with Cylinder Works Big Bore cylinders to achieve significant displacement and horsepower gains.

Built for long-term serviceability, the Hot Rods 4174 is fully rebuildable with genuine Hot Rods connecting rods and bearings. Its gears are manufactured to a quality level of DIN Class 9 or higher, supporting reliable operation under demanding riding conditions. This crankshaft is engineered as a premier alternative to a costly OEM assembly while maintaining the quality expected for Yamaha YZ450F applications.

Fitment: 2006 Yamaha YZ450F, 2007 Yamaha YZ450F, 2008 Yamaha YZ450F, and 2009 Yamaha YZ450F. Brand: Hot Rods. Manufacturer part number: 4174. Vendor part number: 4174.

Features:

• Stroker crankshaft designed to increase engine displacement and horsepower
• Complete assembly includes Hot Rods connecting rods, top-end bearings, and crankshaft webs
• Factory assembled and trued to OEM specifications
• CNC machined and dynamically balanced for the increased stroke
• Drop-in replacement design requiring no modification in most applications
• Uses the stock piston in most applications
• Fully rebuildable with genuine Hot Rods connecting rods and bearings
• Gears manufactured to a quality level of DIN Class 9 or higher
• Can be matched with Cylinder Works Big Bore cylinders for additional displacement and horsepower gains
• Fits 2006-2009 Yamaha YZ450F models