hiya i have just up jet my bike from 78 to 82 jet cos i upgrade to an sport exhaust, it bog to 20mph and then it ok do i need to up jet again or do need adjust the carb x
You need the adjust the carb. Have you added all the other parts you should when fitting a sports exhaust? The main jet is only used for full throttle. Read our carb guide. http://www.scootershack.co.uk/threads/carbs-explained.11967/
