YSers, I went to the Yamada site in Japan downloaded the operators manual for the DZ140. It's setup and adjustment is quite different from what we're used to on Ys's. The lowspeed or idle adjustmenat is accomplished by adjusting the regulator, clockwise is rich ccw is lean, it does not appear to have a low speed screw on the carb which may not be a carb at all since it controls airflow and meters fuel flow to the fuel injector. Also it comes with a venturi restrictor that limits rpm by 3 to 400 to promote fuel economy, I wonder how many of those will stay in. They recommend not trying to hand start it only use a starter. It comes with a special clunk that when any part of the clunk is exposed, the engine stops. It will not empty the tank. There is also a 140L that appears to have the old style regulator.