XF 200 jets?

[09Fx200Q]

O.k. I'm ordering the pro circuit t-4 system that Trevort recommended today.

http://www.ebay.com/itm/231175131958...84.m1423.l2649

Also ordering a moose racing air filter.

http://www.ebay.com/itm/MOOSE-RACING...8d5b7f&vxp=mtr

I was going to go with a k&n 50mm cone, but it seems from what I've read that the bs carbs don't like not having an air box so I figure I won't mess with that...

I'm still unsure on what jets to order? I've read that most ppl have changed to the 35 genuine mikuni main jet and I'm unsure if I need to change the needle too? Could use some help on this. Links for the right jets needles and advice please. Thank you