Well I made some changes and it really made a huge difference. I had been having lots of trouble trying to get the WT-324 wide bore carb to work without having hold a finger in the velocity stack to get it to keep running. So I switched carbs a couple of times first was a Zama carb which gave me about 6500 rpm. I then switched to a WT-312 (9.53 mm venturi/bore) and that one really worked well. I was now getting 7500-7700 rpm's. Then I switched from a 16X8 Master Screw to the same size APC and the RPM's went up to 7900-8100 RPM's and the transition was very nice but it was idling to high. I really wanted to see if the WT-324 would work as it is the largest bore I have. So with a dremil tool and sandpaper I messaged the carb addapter opening to match the carb exit then I cut the gasket hole to the same size opening. Installed it and it ran very nicely with open choke and no fingers in the stack. I couldn"t get a tach on it as it is dark outside but judging by the way it was 2-cycling it really sounded good. I don't think I've got the needles set right but I'll keep dinking with those till I get the right idle, transition and max RPM's.