ok.... today i got the stuff i ordered from moped junkyard:a speed sproket a size 64carb jet(old was 54) and a float bowl gasket and a new throtal cable.... so me and my friend put everything on but we couldnt get the carb to open all the way like it usto (at least i think it usto)..... so i took it for a spin with the new jet in... it wasnt geting enough air so i desided to put the size 54 back in but then i ran it with out the airfilter which i had never done with the size 54 and it ran like it had with the air filter on previously.... but when i tryed to put the air filter on it would be choked of air and stop.... so i ran it and i still wasnt geting half the power that i normaly got(lol but the same speed thanks to the speed sproket).....i cant figure out what the problem is i dont know if we dont have the throtal hooked up right in the carb or what but its driving me crazy and someone PLEASE know the answer to this iv been waiting for 2 weeks to get these parts and it still wont run.....