KLE500 jet size?
 

I have a free flowing exhaust, iridium spark plugs and now the air box mod with a DNA air filter. Will I need to go up in jet size. Has any one seen any dyno results or recommendations?

undoubtably it will be running lean now. By far the best thing is to stick it on a dyno. All bikes behave differently to others, and the correct jet for yours may well not suit another KLE.