sorta like to know about this myself i have the same issue
I was wondering if a jet kit would help. It's on my list of things I "need" to buy!Bumping idle is just a band aid. Once the engine is warm it will call for more fuel and now it will idle way to high because you messed with it. I think if it was me I would WOT at start and hold on, just kiddin'. I would probably start with air/fuel.
I've found that after installing jet kit on both my Rinny and Ruby they start much, much better; night and day difference in fact. Won't really give you any more power but it will improve throttle response and starting. Good luck!!