[san rensho]

If you do a search, many people with good clutchs report chatter when launching. I get a bit of chatter launching at low rpms, around 1000-1500 rpm. Above 2000, it is perfectly smooth.

I think part of the problem may be glazing of the clutch/pp/flywheel. If I launch 3 or 4 times at about 3000-3500 rpm, keeping the rpms up until the clutch fully engages, it seems to clean up the glazing and I get silky smooth starts at low rpms for about a week or so, then the chatter slowly starts to come back.