Hey guys, I'm new to this but I've been reading this for a few weeks now. I've been trying to get my old moped running again. I finally got the carb totally cleaned out and I started it up yesterday. It'll run for a little while and then die out. Also there is heavy smoke coming from the exhaust. It is now power and while it is running it sounds starved. I've replaced the air filter and all of the seals in the carb. Also the fuel filters are new. I have also noticed a little black oil like substance dripping from the exhaust (I remember it doing this a little but not this much). I don't know what to do from here. I was thinking about checking my spark plug gap and gas mixture. Does anyone have any other ideas to solve the smoke power problems? I'm just hoping it is not a piston problem because I don't know how to fix that.
Thanks for any help!