- Jul 15, 2010
I'm about at the end of the easy fixes for this problem I'm having with a 74 850 Roadster. Flat spot off idle, new needle and needle jets, new #3 slides, 220 mains, K&N filter, peashooter exhaust (probably EMGO). I can't seem to shake the flat spot off idle, and it seems to be concentrated in the right cylinder. I've double checked the idle circuits and they are clear. The timing is fine. Float levels set to the usual, I forget what measurement that is. When the flat spot occurs while riding, flooding the carb with the tickler helps. Are my mains sufficient for the K&N and fairly open exhaust? I also switched the coils and the problem remained on the right side. Boyer Bransden ignition. Any ideas? Thanks.