GEAR SPROCKET hELP pLZ

[AZTIG]

Does anyone know how to install a drive gear sprocket for 47cc pocket bike??!!!..i wana put my drive gear its a 9 teeth the stock is 6 teeth..i wana see the different..anyone done it!!! anyone please??? im trying to find a installation over internet but cant find it!!!....

[needforspeed]

do u have a metric thread on the sprocket cuz if u do then all u have to do is to unscrew the old and screw in the new but u might have to heat up the threads or re tap them