Today I was riding, and i go up a steep hill and continue riding, then i had my 78 maxi II off, and when i went to go start riding it again, it would shake violently when ever it went to shift into second. once it was in second gear, there was no more shaking. another thing ive been noticing is this zzzzzzzzzzzzzzzzzzzzzzzzzzz kind of noise coming from the tranny when im going up a hill or when im going 20-27mph. And this has happened like 2 times- but if im riding in a hilly area, my moped will just stall and come to a stop like i just killed the engine. it makes a pretty loud zzzzzzzzzzzzzzzzzzzz noise right when if first turns off. the moped has only 1700 miles on it. it has a very slow leak coming out of the tranny and im thinking maybe the oil is low, so ill check that tomorrow.