Hot Cams Stage 1 Racing Camshaft 4012-1IN for Yamaha YZ250F

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!

Upgrade your four-stroke Yamaha with the Hot Cams Stage 1 Racing Camshaft, manufacturer part number 4012-1IN and vendor part number 68-2058. Designed for 2001–2010 Yamaha YZ250F models, this high-performance camshaft is engineered to improve throttle response, engine feel, and rider control throughout the usable throttle range. Hot Cams developed this camshaft with Improved Throttle Response (ITR) technology, using carefully engineered opening ramps to promote a cleaner intake charge and a more efficient combustion cycle.

The Stage 1 camshaft is intended for racing and performance applications where responsive power delivery is a priority. Unlike camshaft designs developed solely for peak dyno output, Hot Cams focuses on delivering practical improvements in throttle response and engine behavior on the track. The result is a more responsive engine that helps provide improved control when accelerating, cornering, and transitioning between throttle positions.

Installation is designed around the use of stock valve springs and rockers in most applications, helping simplify performance upgrades while maintaining compatibility with original valve-train components. No core is required. Adjustable cam sprockets are supplied with some models; verify the contents and installation requirements for your specific application before assembly. Proper installation and valve-train inspection are recommended.

This Hot Cams camshaft fits 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, and 2010 Yamaha YZ250F motorcycles. It is not legal for use in California on pollution-controlled vehicles and is intended for race use in California; a waiver may be available. Confirm model-year fitment and applicable regulations before installation.

Features:

• High-performance Stage 1 racing camshaft for responsive engine performance
• Improved Throttle Response (ITR) technology for enhanced throttle feel and control
• Engineered opening ramps support a cleaner intake charge and efficient combustion cycle
• Designed to use stock valve springs and rockers in most applications
• No core required
• Adjustable cam sprockets supplied with some models
• Fits 2001–2010 Yamaha YZ250F motorcycles
• Race use only in California on pollution-controlled vehicles; waiver may be available

Fitment:
2001 Yamaha WR250F
2001 Yamaha YZ250F
2002 Yamaha WR250F
2002 Yamaha YZ250F
2003 Yamaha WR250F
2003 Yamaha YZ250F
2004 Yamaha WR250F
2004 Yamaha YZ250F
2005 Yamaha WR250F
2005 Yamaha YZ250F
2006 Yamaha WR250F
2006 Yamaha YZ250F
2007 Yamaha WR250F
2007 Yamaha YZ250F
2008 Yamaha WR250F
2008 Yamaha YZ250F
2009 Yamaha WR250F
2009 Yamaha YZ250F
2010 Yamaha WR250F
2010 Yamaha YZ250F
2011 Yamaha WR250F
2011 Yamaha YZ250F
2012 Yamaha WR250F
2012 Yamaha YZ250F
2013 Yamaha WR250F
2013 Yamaha YZ250F