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Help out w/Powerjet ?'s

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Hillclimb#42:
Hey Guys,
  I need some advice for our Frakenstein Bike. Its our version of a Hybrid. 86 KDX 200 with KDX, KX and CR parts that make up the patchwork. This question is about the carburetor that we have mounted up. The bike came with a Mikuni that didn't seem to run very strong. We tried a Kehin that was on a CR500. That carb would rev fast and way up in the range. The problem for me was, it would die quickly, if I let off the gas. We tried a wide variety of slow jets, but could not get it to idle and it had trouble with a low rpm bog. If it was allowed to idle down, then a quick blast of throttle it would hesitate before revving. Now, we have a newer Kehin that came from a 99 (I think ) kx250 with a powerjet. This carb idles, has no bogging, and holds the power on the top-end well.
  I want to know, if I can hook up the powerjet and get even better results. The KDX still has the lighting coil or whatever, can I just hook it up to the power jet, or how does it work? I don't have any other resource for these kinda questions, so thanks ahead of time for your brain power. :wink:
 

DoldGuy:
#42,
The powerjet gets it's "Signal" from the CDI box to energize in the midrange & to cut out in the upper RPM for added overrev. With out a CDI controlling the signal of when to turn on & off I would not recommend hooking up the PJ.

BDI:
Please do not throw rocks at me for asking this. You do know that on the CR500 carb that you had, in order to get it to idle right you have to pull up the choke and turn it left or right like a volume knob in order to set the idle. Once this is done correctlty the bike should idle and respond to throttle blips very well. If you don't know this you would proably never guess it. As for the power jet I'm thinking you would have to use the computer but the man you should ask about this is Don You should pm him to get his attention on this.

Hillclimb#42:
Yeah, BDI, we were aware that the idle worked like that. It was always screwed all the way out to idle and that made the blip worse. Less idle = better blip. We were unsure how that adjustment was changing the idle. Does it do the same thing as other idle adjustments, or is it opening the choke valve? We tried a bunch to get it running right, but thought we may have a needle problem, since we could never get it lean enough on idle.
  There is a diode-deal on the frame of the 250's the power jet hooks up to, but is it a different voltage feed than a lighting coil? Is it hurting performance to run without the Powerjet hooked up on that carb? It runs pretty good, but not sure if I can get the PJ helpin or not.

BDI:
I figured as much but I had to ask. You never know :? even the smartest of people can over look things some times. I wonder if it had the wrong slide cut away for your app. You should try one of the pwm carbs on it. They make very good power. you can get them from sudco big bored. Your K-5 would like one 8-) I can promis you that.

 P.S. thanks for not throwing rocks

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