OW,
Don't waste your money. As far as I know, the knurled thumbscrews everyone is selling are for HD Keihin carbs. I have a pair, and recently found they don't do much, if anything, due to the different taper they have from the stock screws in our carbs.
I am currently looking into getting some made by a friend of mine. It is too soon to know if he will be successful, but if he is, I will let everyone know.
