Hot Cams Stage 1 Racing Camshaft 4002-1IN for Yamaha WR400F, WR426F and YZ400F/YZ426F

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!

Upgrade your Yamaha four-stroke engine with the Hot Cams Stage 1 Racing Camshaft, manufacturer part number 4002-1IN and vendor part number 68-2062. This high-performance camshaft is engineered for improved throttle response, stronger engine performance, and enhanced rider control across the usable throttle range. Hot Cams Improved Throttle Response (ITR) technology uses carefully developed opening ramps to promote a cleaner intake charge and more efficient combustion cycle than conventional camshaft designs.

The Hot Cams 4002-1IN camshaft is designed for select Yamaha models and is intended to work with stock valve springs and rocker arms in most applications. No camshaft core is required, making installation more straightforward. Depending on the application, compatible adjustable cam sprockets may be supplied to help optimize cam timing during engine setup. This Stage 1 racing camshaft is suited to riders and builders seeking sharper engine response and performance for competition use.

Fitment includes the 1998-2000 Yamaha WR400F, 2001-2002 Yamaha WR426F, 1998-2000 Yamaha YZ400F, and 2000-2002 Yamaha YZ426F. Verify the motorcycle model, year, engine configuration, and installation requirements before ordering. The Hot Cams Stage 1 Racing Camshaft is not legal for use in California on pollution-controlled vehicles and is intended for race use in California; a waiver may be available. Professional installation and appropriate valve-train setup are recommended.

Features:

• High-performance Stage 1 racing camshaft for select Yamaha four-stroke motorcycles
• Improved Throttle Response (ITR) technology enhances throttle feel and engine responsiveness
• Engineered opening ramps support a cleaner intake charge and more efficient combustion
• Designed to use stock valve springs and rocker arms in most applications
• No camshaft core required
• Adjustable cam sprockets supplied with some applications
• Fits 1998-2000 Yamaha WR400F, 2001-2002 Yamaha WR426F, 1998-2000 Yamaha YZ400F, and 2000-2002 Yamaha YZ426F
• Brand: Hot Cams
• Manufacturer part number: 4002-1IN
• Vendor part number: 68-2062
• Race use only in California; not legal for pollution-controlled vehicles

Fitment:
1998 Yamaha WR400F
1998 Yamaha YZ400F
1999 Yamaha WR400F
1999 Yamaha YZ400F
2000 Yamaha WR400F
2000 Yamaha YZ426F
2001 Yamaha WR426F
2001 Yamaha YZ426F
2002 Yamaha WR426F
2002 Yamaha YZ426F