Ok, i'm stumpped.

I have a saito 80 (gk) that I used to run inverted on an old mustang. I have since stripped down the mustang and the engine has been sitting around for a while.
I decided to use the saito in my freestyle but can not get the engine to run up right on my test stand.

I have switch out plugs from the installed saito plug to an OS f plug, adjusted the valves, and cleaned the carb.

I can get the engine to start and idle but when I try to transition to high speed the engine dies. It will puff smoke sputter and die. I can go back to idle and it will stay running. I've tried adjusting the low in in both directions but it acts the same way each time. It will not get past mid range.

any help or needle settings are needed


thanks
steve