Hi everyone, I am new to this forum and I have a 78' pa50 that I got as a barn find. The moped currently runs but it frequently has low power and acts like it is out of gas.
Here's what I've done so far:
-Installed new carburetor (I cleaned the original several times before replacing)
-replaced top end gaskets and both crank seals
-cleaned and lapped decompression valve
-replaced/set ignition points
-replaced petcock/cleaned tank
-replaced air filter/cleaned air box
-checked for air leaks
-checked/cleaned the reed valve
I thought it could be the gas cap vent so I tried it with no gas cap and it's still acting like it's out of fuel. It really seems lean to me but the spark plug is grey/ tan in color.
Once in a while it will run good for a few days but then go back to weak, pathetic and barely running.
Any ideas? This hobbit really has me stumped
Thanks in advance