Hot Cams Exhaust Camshaft Yamaha YFZ450R 2009-2020 4287-1E

If you're running a YFZ450R in competitive racing, your stock exhaust camshaft is leaving power on the table. The Hot Cams 4287-1E is engineered to unlock significant torque gains across the RPM band while sharpening throttle response—exactly what separates winners from the field. Whether you're chasing mid-range grunt or peak horsepower, this camshaft delivers the performance consistency that separates amateur builds from podium-ready machines.

The 4287-1E features Hot Cams' proprietary Improved Throttle Response (ITR) technology, which refines valve opening and closing curves for snappier throttle input without sacrificing reliability under sustained racing loads. Built with durability as a priority, this camshaft maintains tight tolerances through hundreds of race hours, making it a solid investment for serious competitors.

• Fits Yamaha YFZ450R 2009–2020
• Exhaust camshaft only
• MPN: 4287-1E
• Stage 1/Stage 2 capable
• ITR throttle design
• Increased low-end torque
• Enhanced mid-range power
• Maximized peak horsepower
• Race-duty construction
• Bolt-on installation