If you are running the stock airbox & mufflers then a #42 or #45 pilot jet will work, 130 main jet, stock needle jet with at least 2/3 shims under it or if you really want to wake it up get a set of Gossie needles and feel the power,
They work alot better than stock. Turn the pilot fuel screw out to 2 to 2.5 turns CCW from lightly seated. Drill the vacuum hole in the slides out to 7/64's dia. to get a quicker response from it. Fuel milage will suffer a bit but the tradeoff is a much better running rig that makes a bit more lowend torque and HP to help the tall 1st gear off-road and on hills. If you haven't already ditch the vacuum petcock for a manual one, that can cause lean conditions especially at higher speeds or low vac situations. That should get you started in the ballpark and you can fine tune from there.
2010 Black Patrol-Sergey built motor, Modtop airbox, drilled slides, 145/42 jets, 2013 Branch pipes, Gossie needles, perch rings(my own), Insulated Mikuni intake manifolds, PA ignition with VOES, Modtop pushrods, Raceway dual Hi-mount FMF exhaust, 2014 Steering damper, Raceway 2WD/Rev Shifter, Royal Purple fluids.
I don't suffer from insanity, I'm enjoying every moment of it!