ive got one with the lightened flywheel and strangely i can just drop it in at idle with no revs. only works on flat roads of course. i find that if i give it a bit of revs its not as smooth. seems to work better for me with low revs and quick engaging(not dumping). the clutch just bites(you can feel it) and your ready to go. this is just normal driving. i havent launched it yet, never needed to..ha
p.s dunno if the flywheel make it this way though.