I took the day off work today and completely put my top-end back together. The bike ran fine for 15 minutes or so, then went back to the same old problem - the top cylinder does not seem to be firing at full strength. It begins with misfiring at low rpm, and soon becomes intolerable. My next effort will have to be aimed at ignition (even though I have already replaced one of the CDI units). Any ideas? There still seems to be a spark in the top cylinder, but it is pink, not blue.
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'87 MC16