Hot Cams Stage 1 Racing Camshaft 4023-1IN for Yamaha YZ450F and WR450F

WE RACE ON THE TRACK, NOT THE DYNO! Most camshaft designs are developed only on a dyno. Good camshaft designs not only increase power, they also improve throttle response. However, more power and better throttle response is a difficult design problem. Hotcams’ ITR technology solved this dilemma through highly engineered opening ramps not found on other cams. Using ITR technology, the critical ramp area is designed to give your engine a cleaner intake charge and a more efficient combustion cycle, making your engine more responsive at all throttle openings and giving the rider better feel and control of the engine! You will notice the difference!

The Hot Cams Stage 1 Racing Camshaft, manufacturer part number 4023-1IN and vendor part number 68-2065, is a high-performance valve-train upgrade for select Yamaha four-stroke off-road motorcycles. Designed for riders seeking stronger engine response and improved control, this camshaft uses Hot Cams Improved Throttle Response (ITR) technology to optimize the opening ramp and promote a cleaner intake charge and more efficient combustion cycle.

ITR technology is engineered to improve throttle response across the operating range, helping the engine react more precisely at different throttle openings. The Stage 1 profile is designed as a practical performance upgrade for compatible engines and is intended to work with stock valve springs and rocker arms in most applications. No camshaft core is required, simplifying installation and replacement.

This Hot Cams camshaft fits 2003-2009 Yamaha YZ450F models and 2003-2005 Yamaha WR450F models. Verify the motorcycle model year, engine configuration, and manufacturer part number before ordering to ensure proper fitment. Some Hot Cams applications may include an adjustable cam sprocket; confirm application-specific contents with the installation instructions. This product is intended for racing and off-road competition use. It is not legal for use in California on pollution-controlled vehicles, although a race-use waiver may be available.

Features:

• High-performance Stage 1 racing camshaft for select Yamaha 450F engines
• Improved Throttle Response (ITR) technology enhances engine response and rider control
• Engineered opening ramps support a cleaner intake charge and efficient combustion
• Designed to use stock valve springs and rocker arms in most applications
• No camshaft core required
• Fits 2003-2009 Yamaha YZ450F and 2003-2005 Yamaha WR450F models
• Manufacturer part number: 4023-1IN
• Vendor part number: 68-2065
• Race-use product; not legal for use in California on pollution-controlled vehicles

Fitment:
2003 Yamaha WR450F
2003 Yamaha YZ450F
2004 Yamaha WR450F
2004 Yamaha YFZ450
2004 Yamaha YZ450F
2005 Yamaha WR450F
2005 Yamaha YFZ450
2005 Yamaha YZ450F
2006 Yamaha WR450F
2006 Yamaha YFZ450
2006 Yamaha YZ450F
2007 Yamaha WR450F
2007 Yamaha YFZ450
2007 Yamaha YZ450F
2008 Yamaha WR450F
2008 Yamaha YFZ450
2008 Yamaha YZ450F
2009 Yamaha WR450F
2009 Yamaha YFZ450
2009 Yamaha YZ450F
2010 Yamaha WR450F
2011 Yamaha WR450F
2012 Yamaha WR450F
2013 Yamaha WR450F
2014 Yamaha WR450F
2015 Yamaha WR450F