Hot Cams Stage 2 Racing Camshaft 4288-2IN for Yamaha YFZ450R and YFZ450X

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 4288-2IN and vendor part number 4288-2IN, is engineered for high-performance Yamaha sport ATV applications. This racing camshaft uses Hot Cams Improved Throttle Response (ITR) technology to optimize the critical opening ramp area, helping deliver a cleaner intake charge, more efficient combustion cycle, and sharper throttle response throughout the operating range.

Designed for riders who want improved engine feel and control, the Stage 2 camshaft supports stronger performance without requiring a core exchange. It is designed to work with stock valve springs and rockers in most applications, helping simplify installation while maintaining compatibility with the original valvetrain components. Adjustable cam sprockets are supplied with some applications; verify the contents and installation requirements for your specific model before assembly.

Fitment includes the 2009–2017 Yamaha YFZ450R and the 2010 Yamaha YFZ450X. This Hot Cams camshaft is intended for racing and off-road performance use. It is not legal for use in California on pollution-controlled vehicles and is race use only in California; a waiver may be available. Professional installation and proper cam timing verification are recommended to help ensure reliable operation and peak performance.

Features:

• High-performance Stage 2 racing camshaft for Yamaha YFZ450R and YFZ450X applications
• Hot Cams Improved Throttle Response (ITR) technology enhances engine response and rider control
• Designed to improve throttle response, intake charge quality, and combustion efficiency
• No core exchange required
• Designed for use with stock valve springs and rockers in most applications
• Adjustable cam sprockets supplied with some models
• Fits 2009–2017 Yamaha YFZ450R and 2010 Yamaha YFZ450X
• Manufacturer and vendor part number: 4288-2IN
• Not legal for use in California on pollution-controlled vehicles; race use only in California, with waiver availability subject to applicable requirements

Fitment:
2009 Yamaha YFZ450R
2010 Yamaha YFZ450R
2010 Yamaha YFZ450X
2011 Yamaha YFZ450R
2011 Yamaha YFZ450X
2012 Yamaha YFZ450R
2013 Yamaha YFZ450R
2014 Yamaha YFZ450R
2015 Yamaha YFZ450R
2016 Yamaha YFZ450R
2017 Yamaha YFZ450R
2018 Yamaha YFZ450R
2019 Yamaha YFZ450R
2020 Yamaha YFZ450R
2021 Yamaha YFZ450R