Guest longrider Posted July 25, 2007 Share #1 Posted July 25, 2007 Got a question. My bike is missing on one cylinder. Changed out the coil and the wire and of course the plug, but still have the problem. Is the ignition controlled by the computor or is there something else to check? Link to comment Share on other sites More sharing options...
sarges46 Posted July 25, 2007 Share #2 Posted July 25, 2007 I would check/replace your spark plugs and wires first. If they are original they could be the problem. Easiest job first. The controller or tci/cdi is located under the battery box. If you can remove it and check those connections and clean em up that might make it right. It is a flatish rectangular box. They are expensive to buy if you can find one and ebay ones are risky. And the 83 is a box of its own, no other year will work if memory serves me right. Some also remove the box and dry it. They do get damp over the years and corroded. Once cleaned up some have mounted it on top of the air filter I believe. The coil for that cylinder could be shot too. Link to comment Share on other sites More sharing options...
Venturous Randy Posted July 25, 2007 Share #3 Posted July 25, 2007 Can I assume that in changing the wire that you also changed the cap? I say this because the caps have a resistor in them that can get corroded and cause a dead cylinder. RandyA Link to comment Share on other sites More sharing options...
bongobobny Posted July 25, 2007 Share #4 Posted July 25, 2007 Got a question. My bike is missing on one cylinder. Changed out the coil and the wire and of course the plug, but still have the problem. Is the ignition controlled by the computor or is there something else to check? As stated above, the TCI, which is located below the battery box can cause a problem. Their contacts can become corroded and cause problems. There have been a few threads on this subject, and you may want to remove the TCI, take the cover off, and let it either bake in the sun, or a low temp oven for several hours, along with cleaning the contacts. Yes, it is possible for one of the diodes to be bad causing one cylander to misfire. I assume you checked the suspect cylander for spark and know it is an electrical problem rather than a fuel delivery problem?? Link to comment Share on other sites More sharing options...
Marcarl Posted July 25, 2007 Share #5 Posted July 25, 2007 You may also have a bad diaphram in that cylinder\carburator. Link to comment Share on other sites More sharing options...
Cutty Posted July 25, 2007 Share #6 Posted July 25, 2007 Check 1: fire 2: gas 3: compression ( valve clearence ) 4: carb sync Link to comment Share on other sites More sharing options...
KiteSquid Posted July 25, 2007 Share #7 Posted July 25, 2007 Put a timing light on the wire for the dead cylinder, just to see if it is getting fire... Link to comment Share on other sites More sharing options...
Guest longrider Posted July 26, 2007 Share #8 Posted July 26, 2007 Thanks for the good info. I have tried some of these things but did not know aout the tci. as always good help fom you guys Link to comment Share on other sites More sharing options...
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