The larger the # the larger the jet. My 150 has a 34mm Mikuni and I run the 190 jet in it but I have a 6mm stroke and 63mm bore with a custom made cam. I would say the 190 in yours is to big, may need the 150 main.You will know after your full throttle run. Just remember that you don't let up off the throttle until the engine dies.
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