Home Forums Shifter Karts Please explain not running the power valves.

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    • #34350
      Carl Beavers

      Why do we not run the power valves in the CR125 engines?

      The power valves work great for the Rotax. My KTM300EXC dirt bike has a power valve and it works great. Just seems to me that a properly functioning power valve would be of some benefit.

      Thank you.

    • #34355
      Dale Daugherty

      My understanding of it is that it increases top end power, which is the part of the power band where a kart normally runs. The downside is that it lowers midrange power; midrange is beneficial to the motocross guys, but not so much to us. So, we remove the valves and plug those ports to change the power band to what benefits us on track.

      I am sure someone could more accurately explain it, but I think that is the overall idea…

      2010 Spirit [Birel] SP32 // SRS CR125 - Stock Honda [#08]
      Hill Country Kart Club - New Braunfels, Texas - http://daledaugherty.wordpress.com/

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