Jetting ?

[hillbillyjr]

i have a 2007 dvx 400 with a fmf slip-on exhaust, stage 2 dyno jet, uni and no lid and i am going to get a fmf hi-flo headpipe for it and i was wondering if i will have to re-jet for the headpipe or if it will be ok as is

[cataway]

you did not say what your jetting is now ,so ,its kinda hard to say .
but i will say yes.

[hillbillyjr]

i have a 155 main jet, 25 pilot, 3rd clip

[cataway]

i would expect a 165 would be what you would want but no more than that. will you be running with or with out a spark arrester?