Ok I know i need new jets, the standard as i know is 120 main jets, but i think the bike i have has been restricted at some point as it has 117.5 jets on it, this is playing a little bit of havoc on my bike as it has a full stainless system on it, so not only is it running lean as it would with the restrictor kit removed but it is running really lean, so i am not sure what jets i should put in. any advise would be welcome.

What year is your bike and what do you have fitted to it airfilter/exhaust-wise?

I haev the standard filter and some un named stainless exhaust.

125's w/ stock filter and pipe should jet you satisfactorily rich.