when i had my runner i had an open filter and ran it on a 98 jet which i was told to use for the open filter..im assumein this will be the jet to use on an sr 125????? also what size in mm is the hole on the carb..i know it a 20.5 but what size hole for the airfilter (being lazy i know)
98 is silly big (biggest ive ever fitted to a ported 70 and BIG carb is a 90) it will be around 73 jet with LIGHTER rolers as people ALWAYS mistake transmission advance stalling for incorrect jetting and when there too heavy an overly rich setup is all that will work