If the slide and/or needle straight diameter is wrong (rich) you will also over compensate with the idle screw. In my experience with three different GG 250s, its much eaiser to jet around a #7 slide than a #6, and thats at sea level to 1000'. I recenty had a similar experience doing a Keihin PWK conversion to a Husky WR250. Going to the #7 made the bike much more responsive to other changes. Ross, post your jetting and we will see.
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