yeah for sure, the clutch uses balls and you can go from 6 (stock) to 2, 3 or 4 balls. you can also double up the star shaped spring thingy, put two of them back to back and get much higher stall.
for my stock bike, 3 balls and one spring seemed about perfect. On my brother's airsal 70 kit, the 2 ball/2 spring works well.
i never noticed a problem from the starter shoes, maybe i just wasn't paying attention, but cheetahchrome has a good thread there about it.
my current build will be doppler 50cc on stock cases (ported, duh, based on johno's pictures from forever ago) 14 SHA with tomos reeds. I'm spending money on my truck right now though, so its just chillin' for a few weeks.