A couple of weeks ago I did the .16-.18 conversion using the .18 sleeve and piston. Since then I busted the conrod, so I went back to the .16 sleeve, piston and conrod. Since I started with the .18 until now, I noticed that I have to set the low speed needle WAY lean (almost all the way in) in order to keep the engine running. It still spits plenty of fuel from the pipe. What did I mess up?