how is it again if you pinch the fuel line and it speeds up like a quick rev its good, but what if it speeds up and does not slow down after that? does this mean too lean on the low end????????

Pinching the fuel line will cause the engine to lean out. If its too lean already then pinching the line will cause the engine to die off. If its rich then pinching will cause an increase in RPM as the engine leans out.

I personally don't set an engine this way.

I slowly lean down the engine using a tach about 1-2 clicks at a time and wait 4-5secs for the change to take affect. Once I find a peak setting I back it off 300rpm from this peak and fly it there.

Troy Newman
Team YS