I've been looking for something similar. I put on Yosh RS-3 bolt-ons without baffles (basically a straight pipe) and found that around 4000-5000 rpms the bike stutters and feels "boggy". I have the map for yosh bolt-ons downloaded right now and it just runs like crap!
Guys, I made my own shorties from my OEM midpipes and was trying to save up the money to get a new dyno tune for them too=== can I bum the map from you for now until I get my dyno done? I will share mine when I get it done back to you if you want to try it----