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carb woes

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
I tried to work through this myself but am getting no where.
I bought a set of carbs from a reputable carb guy. He said he would jet them for the K&N pods I have. I Put them on the bike and it runs horrible.
I set the idle mixture screws to 4 turns. Which got me wondering, is a turn 360 degrees, or 180 degrees?
It will start and idle but if I open up the throttle a bit it dies after the engines starts sounding heavily muffled.
I noticed though that if I choke it the RPM go WAY up, no tach at the moment, but I guess easily 6-8K. and the engine sounds great.
Plugs are all new and set to .65MM.
There is a bit of popping from cylinder 3 or 4.
Inititally cylinder 3 did not run, but it has since started working
Does all this add up to a common denominator?
What do I look at now?

Thanks!
 
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Which bike are you talking about and what is the ID on the carb?
 
Sorry I did not list all the requisite info,,, 80' gs1100E
The carbs look identical to the ones that I had on the bike before, one side is imprinted with MIC Mikuni and the other side shows Made in Japan.
I have K&N's so I did not put the airbox back on.
 
If you have the plugs gapped at .065 of an INCH, there is a LOT of your problem! Set the plug gaps to .028 & start over with your carb tuning! It's a wonder it would run at all with that much gap!!! Ray.
 
sorry, decimal in the wrong spot, damn dyslexia... 0.65mm My clymer manual says 0.6-0.7 so I set it in the middle.
 
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If your compression is good, valves are adjusted, and the motor is sound the jetting is off.
What type of pipe are you running with the K&Ns?
Did the guy install a Dynojet or Factorypro kit?
I set these carbs up all the time and I can tell you where to start if you had good needle jets and more info.
 
I think the compression is good, but I should get a guage and check.
I haven't done the valves,, I should probably do that.
I have the stock exhaust with new gaskets.
I don't know what he installed, I have sent him an email to find out.

Thanks for the response.
~M
 
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