Question about the fuel system?
Does the system use an oil injection device, or does the fuel have to be pre-mixed?
As Markus already answered, the FA50 has an oil injection system. However, several users on Moped Army advise to bypass the oil injection system and just premix the fuel -- it will supposedly regain a bit of power lost from powering the pump.
I am looking into creating a guide for this procedure, but it will be a while before I get a chance to sit down and figure it out.