Hot Cams Stage 2 Racing Camshaft 4090-2E for 2003-2009 Yamaha YZ450F

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 2 Racing Camshaft, manufacturer part number 4090-2E and vendor part number 68-2141, is designed for high-performance 2003-2009 Yamaha YZ450F applications. Developed for riders who demand stronger engine response on the track, this camshaft is engineered to increase power while improving throttle feel and control across the usable throttle range.

Hot Cams Improved Throttle Response (ITR) technology uses carefully engineered opening ramps to promote a cleaner intake charge and a more efficient combustion cycle. The result is sharper response at all throttle openings, helping the rider manage power more effectively during acceleration and changing track conditions. This Stage 2 racing camshaft is intended for competition use and is not designed as a street-emissions component.

Installation is designed to be straightforward, with no core required. The camshaft is engineered for use with stock valve springs and rockers in most applications, while adjustable cam sprockets are supplied with some models where applicable. Always verify engine condition, timing requirements, and installation procedures before use. Fitment includes the 2003, 2004, 2005, 2006, 2007, 2008, and 2009 Yamaha YZ450F.

This Hot Cams camshaft is intended for racing applications. It is not legal for use in California on pollution-controlled vehicles; California use is limited to racing applications, with a waiver available. Professional installation and appropriate engine tuning are recommended to achieve proper performance and reliability.

Features:

• High-performance Stage 2 racing camshaft for Yamaha YZ450F models
• Improved Throttle Response (ITR) technology for sharper throttle control
• Engineered opening ramps support a cleaner intake charge and efficient combustion
• No core required for installation
• Designed to use stock valve springs and rockers in most applications
• Adjustable cam sprockets supplied with some models
• Fits 2003-2009 Yamaha YZ450F
• Manufacturer part number: 4090-2E
• Vendor part number: 68-2141
• Race use only in California on pollution-controlled vehicles; waiver available

Fitment:
2003 Yamaha YZ450F
2004 Yamaha YZ450F
2005 Yamaha YZ450F
2006 Yamaha YZ450F
2007 Yamaha YZ450F
2008 Yamaha YZ450F
2009 Yamaha YZ450F