i'd say clean the points, get a sparkplug that you know works i.e. out of a running engine and try again, adjusting the carb on a cold engine is pretty much time wasted
On mine i first used a bit of vacuüm cleaner pipe, the shiny kind. Cut off the bendy bit of the original wh muffler(it was badly infected with tinworm) turner that bendybit till it was facing up, cut some slits in the pipe and put it on with a hose clamp.
Second one i tot some pipe with threads and a 45 and 90 degree bendybit with a 40€ stack muffler