Vtwin doc helped me out with this dam thing recently Im thinking he has the 411! So here goes: My friends coil went bad and we used a single fire coil on a dual fire ignition. V twin doc showed me how to do that. But it still doesnt quite run proper. So here are the settings:Its set at 5900 R.P.M. limit,with advance slope at 9.the rear cylinder is set at 0.Its set on dual fire,its set on electric start.and its set on multi spark not single.Its a crane fireball hi 4e model 8-3100. It cranks for a bit before starting and runs a little rough at low R.P.M. ran just fine with the stock coil.
I don't know how much this is gonna help, but on my Ironhead I use a 8-2100, set at 1degree BTDC, and rear at 2 BTDC and electric start in race mode. Now I have aggressive cams and I don't know how it's supposed to be for a stock single stick.
Hey Adam, Hmmm....not too sure about that one. But give this a shot. Check the threaded inserts in the coils (screw terminals), I have seen them break loose PLEASE tell me you are NOT running in race mode!!!.....Street bike run MUCH MUCH better with a VOES....adjust the VOES to 6 of vacuum...email if you don't know how to adjust them, it seems to be a little known fact to almost everyone that they ARE adjustable. Check the connections to the voes also. Reset set the static timing....set the TDC mark in line with front of the timing hole, this will be at 32 degrees, EVO's and TC's run better SLIGHTLY retarded. I would also throw on a fresh set of CARBON CORE plug wires. The Cranes don't seem to like Taylor style (spiral wound) wires. Check to see how it runs. Then try switching back to single spark and see what happens. If nothing changes, I am not too sure what it could be, other than the coil itself, without being able to see it first hand. If you do figure it out, let me know what you found.
