It is running a little rich with this pipe but I have a larger carb on it I gotta mess with the jets before too long.
And im not sure if it even is a snowmobile pipe it might be my old cr 125
I live in Vermont and every tom dick and harry runs studded winters. The bike actually runs good with the 125 pipe it seems to have a wider powerband than the stocker I:I But I haven't had any after market pipes on there so I got nothing to compare it to.