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upjetting ?

ive got a yamaha aerox 50 with a 9 speed variator, mallosi clutch, polini belt and torque spring. i hav a mallosi air filter to go on n=but im wondering wat size to upjet to and if i need a 6mm or 5mm ?
Jack, December 2010
5mm or 6mm jet as on the internet there is both andd im not sure which one to buy ?

Jack, December 2010
6mm or 5mm what ?i would take it up to about a 70 main jet and see if its better if not then go bigger but not big jumps try 75-80-85 ect

adam bike doctor(of milton keynes motorcycle centre), December 2010
link Click here to see other fixes for Yamaha.