Scooterotica

hi can anyone tell me what size main jet i should put i a vespa px 125 with revolver exhaust? cheers.

Get yourself 2 or 3 jets ,Start with a 114 to be on the safe side and work your way down,112,110 etc ,you shouldn't be to far of at that ,and set your air/mix screw to 2 turns out, keep checking your plug !

Standard 20mm carb, standard PX125 barrel/piston..... 96 with standard exhaust, 98/100 with Simonini, JL3 exhaust 102 main jet.. so I'd say with revolver... start 100 main, then try 102 main, plug check as usual... all other jets/atomiser/corrector jet stay as is.... If caution is your way, start with 104 working back to 102, 100... deffo no less than 100 main..!!!

Good Luck...