4occ Peace Sport Carb - serviceable?

[Gotokyo]

Can anyone tell me whether or not the carb on a Peace Sport scooter is serviceable, or does it have to be replaced? Per replacement- any recommendations on where to order the proper part? I have already seen a lot of part mis-advertised as say 20mm but are actually 18, etc. Looking for a reputable but affordable seller. Also need a new intake manifold as mine is cracked (at less than a year old??).