Jets?

[smallearssuck]

OK, I ordered a HMF slip-on a few days ago and I started to think about the jets they reccomend, they say to run a 175mj?!?! That to me sounds a little CRAZY! I am currently running a STOCK 400ex, it really doesnt come much more stock lol...any suggestions on what I should run for jets I live in Tyngsborough MA, and have noooo clue what my elevation is:rolleyes: thanks for the help

[MNTNMAN]

I run a 150 MJ and 3 turns out on the mix screw at 2000 FT. I would guess that since everything is stock you shouldn't have to go up more than 2 sizes on the MJ.

[cals400ex]

where i live, i would put in a 152 in summer and a 155 in winter.