I know this is not a moped, but maybe someone can help. I bought a 1969 Honda c102, it will start but won't rev past 1500 rpm's. I cleaned the carb real good, no help. when I try to rev it it chokes out and stalls. when I pull the plug it's wet. It will idle all day just fine. this is a 50cc 4 stroke engine. I think it may need a new carb. what else could it be? thanks for any suggestions.