So I'm running an old 70cc eurokit with a tecno boss and a dellorto 14/12 on my swinger2. I know the carb is super small for 70cc's, I'll change it to a 16 or better at a later date. Anyway, Right now I'm running a #63 jet and its way too rich to even get a plug chop. It'll just drive around at like 10mph choking to death on the extra fuel. So whats the deal? I know that the carb isn't going to allow much air flow but that just seems odd that a 63 would be too rich. On the plus side there are no air leaks.