Seems like the damper in the carb passes the center and starts to close again a little bit at full throttle, if let it go as far as it can mechanical. When i run it on the ground, and go from idle to full throttle, it starts to richen after a few seconds. From full to idle it settles down to a nice idle. And from idle to full it goes right up with no problems. It is the erratic run that it gets in periodes that confuces me.

Bjarte