A friend of mine is doing his cam mod on his YFZ450 this weekend and he claims that he will need to rejet the carb after doing just a cam mod using the stock cams. I don't feel that there will be any jetting changes due to the fact that the cam mod is using the same cam timed differently. Also I can't see any reasons for a mixture change.
Has anyone done the cam mod that can shed some light on this subject? Thanks!