Is there any difference between dual and single fire ignitions.........obviously how they fire but what difference if any on performance?

Which one is better?

Has anyone changed, if so why and did it make a difference?

TB

Ok,

Single fire: each cylinder fires on the compression or power stroke.

Dual fire: both cylinders fire at the same time, one is on power stroke, one is on exhaust stroke

Single fire ignitions concentrate the coil's output on one cylinder at the time, eliminating the "wasted" spark on the non power cylinder. The claim is that this improves efficiency, power output and smootheness (this by the way is unproven).  My personal opinion is that I like them. My old Shovel (kicker only) kicked me back a couple of times very early in our relationship , I converted to single fire and it never happened again. In fact with the single fire in, I was able to hand start it (with the kicker, not the thumbstart.). That was great to do in front of a bunch of yuppies, then I'd casually put it in gear and slowly ride off. Coooool!.

So there is really no difference to performance, therefore not really worth spending money on.............