Hot Cams Stage 2 Racing Camshaft 4089-2IN for 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, part number 4089-2IN, is a high-performance intake camshaft engineered for improved power, throttle response, and engine control. Hot Cams develops its racing camshafts for real-world track performance rather than relying solely on dyno results. Its Improved Throttle Response (ITR) technology uses highly engineered opening ramps to promote a cleaner intake charge and more efficient combustion cycle.

This Stage 2 camshaft is designed for competition-focused Yamaha YZ450F applications and helps deliver a more responsive engine across the throttle range. The camshaft is engineered to work with stock valve springs and rockers in most applications, helping simplify installation and supporting dependable performance when properly installed and tuned. No core is required. Fitment includes 2003 through 2009 Yamaha YZ450F models.

Fitment: 2003 Yamaha YZ450F, 2004 Yamaha YZ450F, 2005 Yamaha YZ450F, 2006 Yamaha YZ450F, 2007 Yamaha YZ450F, 2008 Yamaha YZ450F, and 2009 Yamaha YZ450F.

The manufacturer part number and vendor part number are both 4089-2IN. This Hot Cams racing camshaft is intended for off-road and competition use. It is not legal for use in California on pollution-controlled vehicles; race use is permitted in California where applicable, and a waiver may be available. Installation should be completed by a qualified technician, with valve timing and clearances verified before operation.

Features:

• High-performance Stage 2 racing camshaft for competition applications
• Improved Throttle Response (ITR) technology for enhanced engine response and rider control
• Engineered opening ramps support a cleaner intake charge and efficient combustion
• Designed to use stock valve springs and rockers in most applications
• No core required
• Fits 2003-2009 Yamaha YZ450F models
• Manufacturer part number: 4089-2IN
• Vendor part number: 4089-2IN
• Not legal for use in California on pollution-controlled vehicles; race use only in California, with waiver available

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