through to 60 mph or so, my bike will run strong, then, for instance, whin I've set my speed at 70mph for the turnpike,the bike will lose power just enough to slow 2-4 mph, then return to its former faster speed, in cycles of every 4-5 seconds. I have 3 ohm coils , Dyna S ignition, Ngk D7EA plugs. I thought it was a fuel feed issue, so I cleaned out the strainer in the petcock housing and put in two new in-line fuel filters. changed the oil yeaterday.air mix screws are turned out one and a quarter.
how can I get rid of this surge/loss of power at highway speeds?
Hym