Misfiring engine GS850L

[Anonymous]

Hi everyone
I have a GS850L I just recently bought. The bike had been sitting for about a year. Well I got a new battery and got her started. It seemed to accelerate fine at first. But, slowly as time went on, I noticed that it started running like it was running out of gas. It idles fine and at high RPM with full throttle it accelerates very well. In between, when I open the throttle, it misfires very badly and will not accelerate. It also pops and sputters out the exhaust when just cruising. I tried changing the plug wires because they were dry rotted. This did not help.Twice I took the carbs off, disassembled them and cleaned them. This seemed to make the problem worse if anything. Could this be an ignition problem or a carb problem? Or could it be a mechanical problem? What kinds of things should I be looking for or checking? Also, this bike has a 4 into 1 after market exhaust and the carbs were re-jetted as far as I know. The bike is not really rideable as is. Anybody have any ideas? Any help would be greatly appreciated. Thanks. Jim.

[Anonymous]

Intake leak?

Is the intake system ok? If the original air box, and filter are not in place and sealed well this type of problem happen.

[AOD]

you've changed all the spark plugs to rule that out, right?

[Anonymous]

Thanks for the replies.
Plugs are OK. Although there is no air filter in place at the moment. I'll try that.
Thanks again.

[Anonymous]

misfiring

I had a similar problem with my 82 850 G.
The problem ended up being that one of my coils was not making a great connection. Cleaned and tightened, I haven't had a misfire since.

Good luck.