Anyone else ever tried this?

[kawikdx08]

Here's something interesting maybe someone else has done. Has anyone else tried to run an early style KDX without the RH and LH powervalves? I have a 90 E1 and and while waiting for parts to come in I reasembled the topend without the RH and LH powervalves. I left the main valve and the valve rack rod in. I then tried the bike and found some interesting things. At higher RPMs the powerband actually had slightly more power and spread, but as i surmised the bottom end dissapeared. I also thought that it hit harder at mid throttle. Has anyone else out there tried this?

 

[kid1293]

the powervalves control the low end and open at about low to mid throttle as i can recall. I was studying my kawasaki manual one night and the next day poof my wife (put it away) i am still looking for it a year later. Mid to upper may hit a bit harder due to mostly no restriction on the low end but you may be doing damage to your rack rod.

 

[SVandal]

I read of one rider who jbwelded them in the open position and preferred the power curve that way. I doubt you would hurt the engine by doing that, but if you prefer the adjusted power band I think you would be better off just going with a motocross bike that is designed to run on the top end.