HELP!!!! Performance Pipes & jet sizes

[SeanH]

Can anyone help with the correct jet sizes if i put a performance pipe on my NC30.I have the derestricter fitted do i need to change jets, if so what is the best sizes, Front and back.
Lookes like someone has been fiddeling with the carbs. Air screw settings? I have four four different settings(how the hell was the bike ever going). Your wisdom is required. :worthy:

Thanks :worthy:

[Cammo]

Most general thoughts are that 118 mains at the front and 120 at the rear will suit most aftermarket mufflers and exhaust systems. Air screws set at 2.25 turns out will suit this setup.

Big jetting changes are needed if the filter is changed for an aftermarket one or if the airbox is modified. I wouldn't advise it.