Well Honda recomends 20:1 in the R but I always ran Klotz at 50:1 with zero problems. Not sure about the Kawi's but I'd think the same would apply if your jetted for it. I once read an article about running like 16:1 and it had an explination about the oil in the bottom of the crank, but blah blah blah is what I think about thick mixing. If you wanted to be "safe" then stick to 32:1. Like I said tho, mine were safe at 50:1. Just remember that jetting is key when you start playing with your mix ratio.
'02 Honda 416ex - A seasoned blend of 11 herbs and spices
'04 Honda Recon - The yard machine and snow plow
'88 Honda CR250R - Another chapter in my torrid all terrain affair