88 750 paso dual mikunis
I recently purchased dual mikunis from a race shop that specializes in ducati rebuilds, installed carbs and bike runs/idles fine but breaks up bad after 4k rpm, shop says they may be overjetted as carbs were used only for bench testing race engines. carbs look brand new. and were spotless inside. my bike is stock except for yoshi slip ons. Stock weber basically ran bad all the time but did not break up that bad at high rpm. Any suggestions? carb does not seem to have adjustments other than choke and idle/throttlethere are rubber boots on top of carbs which may hold mix screws, but impossible to reach with tank on.
Thank you for any help.