Hot Rods 4074 Stroker Crankshaft for 2006–2009 Yamaha YZ450F

The Hot Rods 4074 Stroker Crankshaft is a high-quality replacement and performance upgrade for select Yamaha YZ450F models. Designed as a premier alternative to a costly OEM crankshaft, this complete assembly is ready for installation and includes proven Hot Rods connecting rods, top-end bearings, and crankshaft webs. The increased stroke is engineered to enhance engine displacement and horsepower while maintaining dependable performance for motocross and high-performance applications.

Each crankshaft is factory assembled and trued to OEM specifications to meet or exceed original-equipment standards for durability and performance. The assembly is CNC machined and dynamically balanced to accommodate the increased stroke, providing a precise drop-in replacement that requires no modification in most applications. The crankshaft is designed to use the stock piston in most applications and can be paired with Cylinder Works Big Bore cylinders for additional displacement and horsepower gains.

Hot Rods uses gears manufactured to DIN Class 9 or higher quality standards, supporting accurate operation and long-term reliability. The crankshaft is also fully rebuildable with genuine Hot Rods connecting rods and bearings, helping simplify future service and maintenance. Part number 4074 fits the 2006, 2007, 2008, and 2009 Yamaha YZ450F. Verify model year and engine configuration before installation.

Features:

• Stroker crankshaft: Increases engine stroke for greater displacement and horsepower potential
• Complete assembly: Includes Hot Rods connecting rods, top-end bearings, and crankshaft webs
• Factory trued: Assembled and trued to OEM specifications for reliable performance
• CNC machined and dynamically balanced: Supports precise operation with the increased stroke
• Drop-in replacement: Requires no modification in most applications
• Stock piston compatibility: Uses the original piston in most applications
• Rebuildable design: Can be serviced with genuine Hot Rods connecting rods and bearings
• High-quality gears: Manufactured to DIN Class 9 or higher standards
• Big-bore compatible: Can be matched with Cylinder Works Big Bore cylinders for additional performance gains
• Fitment: 2006–2009 Yamaha YZ450F
• Brand: Hot Rods
• Manufacturer part number: 4074
• Vendor part number: 4074