so i got this 122S about 3 months ago and im planning on doing a restoration on it. Ive been driving it to school and work and such but nothing too hard, but ive been having a oil leak on what it seems to be the crankshaft seal or main valve cover seal but the mechanic who ive been working with doesnt really have and idea what kind of seal it is or what we need to look for so any help on that would be nice. also ive been having trouble with the original duel carbs and i dont know if i should just get a new more efficient one or rebuild the old ones. also i am getting this awful smell which smells like the clutch but it happens all the time and i make sure not too ride it. any help would be nice.