I have 3 Moki 1.8's and 3 Moki 2.10's. I set up all of mine just as per the instructions. For fuel I use 5% Omega. I use O.S. #8 plugs which work better for me than the O.S. type F. You do not need a regulator if you can locate your fuel tank at the right height with respect to the inlet to the carb. Use large fuel line and tubing into the fuel tank and adjust the high speed needle to max minus 2 to 400 rpm. Adjust the idle disc so that the engine transitions from idle to wide open without 1) a huge puff of smoke (too rich therefore turn disc clockwise) or 2) engine dying (too lean therefore turn the disc counterclockwise). Note that the idle disc is VERY sensitive..a few degrees on either side of the neutral position is all they will ever need. I only use Moki's because I feel they are the most reliable, powerful, easiest starting and best running engines in RC. I go all summer without a dead stick.