A friend has a plunger A7 and has recently had the magneto rebuilt. He seems to have had trouble getting the ignition timing right so I went to help him with it yesterday. I got the timing close enough to run OK, although it was slightly advanced. I know from experience that you are lucky if you get it spot on but these engines are not that fussy about the odd couple of degrees either way. The first thing I noticed was the advance unit would stick on full advance, there seems to be slight resistance that is not overcome by the springs. This sticking was worse when I fully tightened the pinion to the magneto shaft so the bolt seems to be somehow removing the clearance for the bobweights. Has anyone here experienced this problem and found a solution? We didn't have a lot of time but we failed to get the bike started, I'm hoping due to the advance unit problem.
I personally prefer the manual advance magnetos like I had on the A7SS.
