im starting to get this problem too. whats strange is it didnt start happening until after my battery completely died.
i installed my PC III on the bike, no problems starting. In fact it almost seemed like it started up easier.
One day i left my heated grips on after getting off my bike (im an idiot, i didnt wire my grips via relay into my headlights) for 5-6 hours, the battery completely died. Left the bike overnight, charged it the next day and started it up. Ever since i have had to hold the starter button in for 4-6 seconds.
I prefer not to, but its not a huge deal. Still strange that i rode the bike with a PCIII for months without this problem.