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My 78 GS750 has intermittent spark on cylinder 2&3 and good strong spark on 1&4. I thought it might be the coil so I switched the lead the wires around and the spark problem changed from 2&3 to 1&4, so I don't think it's the coil. Any suggestions on other things to check? could it be the points?
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The points are a very likely place to look, as normal wear will eventually get them in a condition where they no longer work. Coils can fail but it's not very likely. Have you adjusted the points lately? Are they in good shape? -
I took a look at the points and they look alright. I checked the gap and the 1&4 side is good but the 2&3 side is a bit tight, I was going to adjust them but the last owner did a number on the screws (thats the least of the problems I've found) but there is a descent gap.Comment
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So it would have too much dwell..... It's not the size of the gap that matters but the dwell angle which that gap controls. Fairly critical stuff, although on some bikes it seems to be more critical than others.
No way to know if that's your problem without loosening the screw and resetting the gap correctly. Just a guess, it probably is the problem. Got a small impact driver with a good tip?Comment
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thanks for the feedback! time to adjust my points.Comment
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Fingers crossed. She's running like a champ. Thanks again!Comment
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Cool, that's good to hear.Comment
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