My 1988 k100 has a misfire on tickover sounds like a clunk and the revs drop for a split second, also seen when balancing TB the gauges drop like a missed beat, Initially had a dud coil replace with a second hand one all cylinders running but still have the misfire, When riding it seems a bit boggy or fluffy or holding back. Thinking it could be hall sensor or coolant temp sensor.
Any help guys.