wat should i do for jetting?

[h400exrydr]

well winter is coming around and i was wondering wat i should do for jettting,right now i have a 155 main and 42 pilot with no choke. all of my motor mods are in my sig. should i go up to a 160 main? the weather gets from -20 to 20 degrees. i want to be able to outrun a z400 with a t-4 pipe k&n and jets. thanks

[h400exrydr]

do u guys think that a 160 main jet or a 155 main jet would work better for -20 to 30 degrees

[2004exrider]

try the 160 maybe even a 165.

Jimmy

[stc416rider]

i say try the 160