This works for me
I use a feeler gauge (.008/.203mm). Not sure how the Kawi forks are set up, but if you have a dust wiper, lower it to the bottom of the tube. Have a can of brake/contact cleaner (with the sprayer tube attached). Carefully insert the feeler gauge between the fork leg and seal, very slightly pry the seal back a tiny bit, and spray the cleaner up into the (tiny) gap between the fork leg seal. Then spray the fork leg with the contact cleaner and wipe with a clean paper towel. Move the feeler gauge and repeat around the circumference of the fork leg. When you've gone around the entire fork leg, spray the fork leg with the contact cleaner and wipe with a clean paper towel. Pump the fork leg; if you see no leakage, you're done! If not, repeat.
I've seen people cringe when I do this or describe the procedure, but it works for me. I replace my seals very infrequently (maybe once every 18 months or so). Just make sure the feeler gauge is in good condition (rounded end and no nicks) and you shouldn't have a problem.