Hot Cams Stage 1 Racing Camshaft 4100-1 for Yamaha Grizzly 660 and Rhino 660

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, manufacturer part number 4100-1 and vendor part number 68-2145, is a high-performance camshaft designed for select Yamaha 660 ATV and side-by-side applications. Developed with Hot Cams Improved Throttle Response (ITR) technology, this camshaft is engineered to improve throttle response, engine feel, and control across the usable throttle range. Its carefully designed opening ramps help promote a cleaner intake charge and a more efficient combustion cycle compared with conventional performance camshaft designs.

This Hot Cams Stage 1 camshaft is designed for installation without requiring a replacement core and is engineered to work with stock valve springs and rocker arms in most applications. Depending on the application, adjustable cam sprockets may be supplied. The result is a practical performance upgrade for riders and racers seeking sharper throttle response and improved engine behavior without a complete valvetrain overhaul.

Fitment includes the 2002-2008 Yamaha YFM660FG Grizzly 4WD with IRS and the 2004-2006 Yamaha YXR660F Rhino 660. Verify the exact model and year before installation. This product is intended for racing and off-road use. It is not legal for use in California on pollution-controlled vehicles; race-use restrictions apply in California, and a waiver may be available. Professional installation and proper camshaft timing are recommended to support reliable operation.

Features:

• High-performance Stage 1 racing camshaft
• Hot Cams Improved Throttle Response (ITR) technology
• Designed to improve throttle response, engine feel, and rider control
• Engineered opening ramps support a cleaner intake charge and efficient combustion
• No replacement core required
• Designed for use with stock valve springs and rocker arms in most applications
• Adjustable cam sprockets supplied with some applications
• Fits select 2002-2008 Yamaha Grizzly 660 and 2004-2006 Yamaha Rhino 660 models
• Race and off-road use only; not legal for use in California on pollution-controlled vehicles

Fitment:
2002 Yamaha YFM660FG Grizzly 4WD [IRS]
2003 Yamaha YFM660FG Grizzly 4WD [IRS]
2004 Yamaha YFM660FG Grizzly 4WD [IRS]
2004 Yamaha YXR660F Rhino 660
2005 Yamaha YFM660FG Grizzly 4WD [IRS]
2005 Yamaha YXR660F Rhino 660
2006 Yamaha YFM660FG Grizzly 4WD [IRS]
2006 Yamaha YXR660F Rhino 660
2007 Yamaha YFM660FG Grizzly 4WD [IRS]
2007 Yamaha YXR660F Rhino 660
2008 Yamaha YFM660FG Grizzly 4WD [IRS]