I'd stay away from the "DYNO JET KITS" just get some Kehin jets, do the 12hole mod to you airbox, and go with a twinair filter. pending on your ele. you sould be looking at sizes in the 175-185 range. Just get you self a few sizes you may need to try a couple differant setups.
I don't know what takes longer, tunnning the carbs or the clutchs on these things. I still haven't got mine perfect after 3 years of trying differant things.
Check out this site for for the V
http://www.kawieriders.com/
2005 KFX700 / Pro-Circuit Duel's / GT Thunder Rebuilds 450R fronts W/ Stock rear rebuild /
Pink Spring & 55.15g HeelClicker weights / Shimmed Stock Needels / 165-170 DJ /
EHS Racing Air Box Lid / Twin Air Filter / Full QuadBoss Protection / Kawi Nerf Bars
2007 KFX90 / Stock
2001 Polaris Sportsman 500 / Stock