Thanks for the great write up racer38! You do make it sound like a simple operation. I'll give that a try as well as hooking up a hose to the overflow nipples...

According to http://tech.nsr-world.com/nsr/nsr-all/carb-settings/ the correct float height for the MC16 is 13mm...am I correct so assume the MC21 is the same?

Thanks!
jon