I'm interested in this too. I'm rebuilding a set of carbs off a K5.
My manual lists the mains as being 120's(in the main section. It didn't mention anything about jet sizes in the K5 supplement elsection) but the keyster rebuild kit I purchased came with 110's. And the main jets I pulled weren't very well marked. I can make out a 1, then there's a space, a 5 and a little k/star symbol. I've been working under the assumption that these are either 105 or 115's.
So you can see I'm a bit confused by all this too.
Not to mention trying figure out what I should run if I go with pods and Carpy's 4-1 exhaust .