i am rebuilding my top end in a cr 125 but i am putting an overbore kit in it i have a fmf rev pip and shorty silencer does anyone know the correct jetting
Your going to have to figure tha one out on your own man. Just play with it untill you get it. Some one may be able to give you a idea but you will have to change it a bit. But first we need to know you elevation and tempatures.