Air/Fuel Mix Screw?

[Cubby1331]

Im getting my scooter ready for the season as I said in a prior post. I finally got it to kind of turn over but it sounds like its going to start and then i hear a few big booms (not natural) sounding for the scoot. Then the engine seems to have trouble moving. Until I pull the plug and crank it a few times than it seems fine.t all smooth.


I just ended up buying a new Carb. I believe that to be the problem its prolly all gunked up. Cause I guess I didnt drain it all the way then I took all the gas out.