I took my Valk I/S to to MotorCare in Lawrence, Ks. and had Tim do the complete job. In addition, without asking, he looked over the bike and found and fixed vacuum leak, adjusted the idle mixture on each carb, replaced the stems because I had too heavy of caps on them and they destroyed the stems, tighten each carb intake ( with the exception of the front two on the left side). He did all this work for only an additional $17. The tire is a Avon AV72 and the total bill was about $280.
Super nice guy and really knowledgeable about the Valk. I highly recommend.
www.motorcaretim.com is his website 1-785-843-3449.