fcr39mm jetting HELP

[speedy400]

So this summer on my fcr39mm I've been running 165main, I think middle needle position, and 50 pilot( I just put a 52 in fmor the colder temps). I will be running ice drags in about a month, it'll prolly be about 15-20 degrees out. since there will only be snow floating in the air I'm going to run no filter, just a few layers of mesh nylon. What should I have for jetting when I remove the filter and such? I was thinking for just for the winter temps I'll bump down the needle clip 1, and richen up the main 1 size, but I dont know about the no filter thing... thanks-darren

[nosliw]

dude there's no scenario where i wouldn't run an airfilter.

[speedy400]

Originally posted by nosliw
dude there's no scenario where i wouldn't run an airfilter. well like I said only thing that would get in is a few snow flakes, I've been racing there 4 years in a row, I see about 1/2 the snowmobiles there run nothing what so ever, just open carbs. I'm being safe by running a few layers of mesh nylon(aka panty hoes).thanks for the concern though-darren

[cals400ex]

i am wondering if you may need to go up 2 or 3 sizes on the mainjet from the colder temps and no air filter. my buddy rans a 52 pilot jet year round with good success, so that should be fine.

[speedy400]

cool, thanks cal.-darren