I'm thinking about buying a vespa ciao from someone and i don't know a whole lot about working on mopeds. it's got a problem where the engine wants to cutoff when you apply the brakes. someone told him that it's probably due to the clutch not separating correctly. Is this something that i can fix myself (keeping in mind that i don't know a thing about working on engines) or have done for pretty cheap? Is the thing worth buying if i can get it for a decent price? thanks for any advice you have for me.