Hot Cams Stage 1 Racing Camshaft 4020-1E 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!

The Hot Cams Stage 1 Racing Camshaft is engineered for riders seeking sharper throttle response, improved engine feel, and dependable performance across the usable powerband. Part number 4020-1E is designed for 2001–2010 Yamaha YZ250F models and uses Improved Throttle Response (ITR) technology to optimize valve opening ramps. This design helps deliver a cleaner intake charge and a more efficient combustion cycle, allowing the engine to respond more precisely at a range of throttle openings.

Unlike camshafts developed solely for dyno power gains, the Hot Cams Stage 1 profile is designed with real track performance in mind. The result is a responsive engine character that can provide better rider control and improved throttle feel during acceleration, corner exits, and changing track conditions. This racing camshaft does not require a core and is designed to work with stock valve springs and rocker components in most applications. Adjustable cam sprockets are supplied with some models when applicable.

Fitment: 2001–2010 Yamaha YZ250F. This product is manufactured by Hot Cams and is identified by manufacturer and vendor part number 4020-1E. It is intended for competition and racing applications. The Hot Cams Stage 1 Racing Camshaft is not legal for use in California on pollution-controlled vehicles; California race-use restrictions apply, and a waiver may be available. Confirm engine configuration and installation requirements before fitting.

Features:

• High-performance Stage 1 racing camshaft for Yamaha YZ250F applications
• Improved Throttle Response (ITR) technology for sharper engine response and enhanced rider control
• Engineered opening ramps promote a cleaner intake charge and efficient combustion
• No core required
• Designed to use stock valve springs and rocker components in most applications
• Adjustable cam sprockets supplied with some models where applicable
• Fits 2001–2010 Yamaha YZ250F models
• Manufacturer: Hot Cams; manufacturer and vendor part number: 4020-1E
• 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