justfun1 Posted July 8, 2014 #1 Posted July 8, 2014 Hi, I have been having issues with a poor running 89 that is very sluggish. acts likeit is on 3 cylinders much of the time. I have rebuilt the carbs, synced them with a tool, and installed new plug wires, caps and plugs, checked the pickup connectors, and cleaned up the TCI connectors. All cylindars fire but many seem weak and for 1 cylinder in particular I can remove the plug wire while idling and it barely changes the idle. Due to another issue I was able to get to my coils & TCI. Upon inspecting the coils I found that 3 of them have cracks in the housing at the top of the body on the mold parting line. Does this indicate that they are bad or weak? Would the cracks affect the delivered spark? Thanks in advance!
saddlebum Posted July 8, 2014 #2 Posted July 8, 2014 Cracks in any coil can cause the spark meant to jump at the plugs to detour along an easier path. A good way to test if your having high voltage leakage is run the bike in the dark and with a spray bottle mist over the entire ignition system. If you start to see what us mechanics like to refer to as Christmas lights you have found your problem.
Evan Posted July 8, 2014 #3 Posted July 8, 2014 Cracks in any coil can cause the spark meant to jump at the plugs to detour along an easier path. A good way to test if your having high voltage leakage is run the bike in the dark and with a spray bottle mist over the entire ignition system. If you start to see what us mechanics like to refer to as Christmas lights you have found your problem. Yup. Many years ago, had a KZ650 that would occasionally miss a beat. Drove me crazy. Took it to a couple shops that were not able to figure out the source of the problem. Turned out that the coils looked normal but every now and then, one would arc from the side of the coil to the frame. Found out one day when I was on the ground checking out something else and noticed the arc.
Brown Angel Posted July 12, 2014 #4 Posted July 12, 2014 Can you say how you got to the coils so easily? I have an extra set but need to start l:Avatars_Gee_George:ooking to remove them and don't know where to start the process.
Dano Posted July 12, 2014 #6 Posted July 12, 2014 I've got a set of coils still mounted to their rack, only 26,000 miles on them but they're from an 86 that is dismantled now. I'd take $75 (includes shipping) for them if you need them. 317-370-0139 cell Call me first thing in the morning and I'll get them out tomorrow for ya
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