Consider my essay up a bit just incase something's relevant but if it's genuinely "rich blubbery" [& not over porting big hole in the start of the powerband] as you come on the pipe so need to give it more throttle than should need to get past it so to speak. If rich though you'll just have to jet it down whichever part of the carb it is in relation to where it happens. No use holding wide open from an idle to get past it in revs but ride it increasing slowly until--right there--then decide where 'right there 'is'-- like 1/3 throttle & maybe cutaway to rich or needle clip too low. Or if its an old carb, quite likely the needle jet [emulsion tube] where it meters at the top is worn oval--that plus wear on the needle but definitely the metering bit. If bad enough you can hold the tube up to the light & see the elongation at the metering point. Back a few haircuts when i had hair--i had a YZ125K so "83 or a bit later probably "85 so had lots of use, bought second hand & was a bugger sitting on the start line & had to constantly rev the shit out of it to be clean when the flag dropped [anyone remember flags lol]. So got a new needle & jet [the tube] std size as came out & just transformed it. I know you have 5 clip grooves & all that but if there's significant wear then leaning off the clip will help but not fix it & if say you need to go from richest to leanest clip to get it to improve then that'll bugger it up somewhere else. Could do it to prove a point & if mostly sorts it then go & replace the bits with new items. Actual if ya talking 34mm it's probably what my old K had on std back then so might be same carb. Sorry to harp on, but that's me done. Thanks.--except i'll probably have to edit mistakes--old keyboard.
