Author Topic: Occasional backfire thru muffler  (Read 3306 times)

zombie

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Re: Occasional backfire thru muffler
« Reply #15 on: May 21, 2012, 11:16:11 PM »
It is obviously a wiring problem. The light green is ground through the bike, Your coil is fired from one wire off the cdi, and the other is ground to the coil. That should read as gnd. The two wires off the stator go straight into the cdias the fire source, and the pulsor goes into the cdi as trigger. Eleminate ALL the extras, and try direct wiring the cdi/stator/coil. It should run. then just pull the gnd of the coil to stop it. That will tell you the parts are good , and the problem is in the harness somewhere.
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HabHazard

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Re: Occasional backfire thru muffler
« Reply #16 on: May 23, 2012, 01:48:56 AM »
Got IT!! It was a friggin open safety switch, rear brake to be exact. :) Scoot is back together and went for a ride, still need to do some tuning on it, but good enough for the moment. One small anomaly though, I need to find out where the tach is getting its signal from. When driving it works fine, but when the scoot idles down, the tach is all over the place, 2k rpm to 10k rpm and back n forth, with the engine at idle, loose connector maybe, gonna mess with that tomorrow. Thanks for the help again guys :)

zombie

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Re: Occasional backfire thru muffler
« Reply #17 on: May 23, 2012, 01:50:50 AM »
Cool. Maybe turn up the idle just a touch.
"They have nothing in their whole imperial arsenal that can break the spirit of one Irishman who doesn't want to be broken."   Bobby Sands...

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