I've got a '78 Yamaha street thumper and after some mods needed to richen
the mixture. One of the things that needed to be changed was to
take .05" off the bottom of the carb slide.

Nova chuck, spigot jaws (inside grip) and a couple of files - 10 minutes
from start to finish. Never thought my wood lathe would come in handy
for motorcycle repair :-).

--
Intelligence is an experiment that failed - G. B. Shaw