Cambo...What pipe are you running? I'm running the Hatori SAB-6RS pipe. I was running the Mavrikk at first. I had to lean the low/mixture needle as well to get it to idle. I also had to lean the high speed needle a little as well.

I flooded my engine with the super rich settings from the factory. It was not fun, I had to take the engine completely out to ensure I didn't bend the crankshaft of the piston rod. I'm glad I did since it gave me chance to get the metal/aluminum particles out the engine from the break-in process.

BTW: The OS .37 is totally different engine with the Hatori vs the Mavrikk. I had to tone my throttle curve down. That little engine has lot's of power with the right pipe.