When drilling the slide, is it the hole right next to the needle that is drilled out? I'm not sure that I will be going that route but I am curious.
If you don't have the rubber plug, it is missing. You can't leave out parts of the carb and expect it to run properly....to the right of the "main jet holder" is a rubber seal... I'm not sure I saw that when I cleaned my carb... is something missing? or did I miss cleaning a part of it?
Possibly a Teikei.........wonder if his air filter was clean?.is this the mikuni 28mm carb?