No Yamaha shims are the same size. About 25 mm. John you can do it yourself. I know the anxiety myself. Been exactly where you are myself. Did it myself winter 2016 at 33,000 miles without removing the cams. Only 3 valves were slightly out enough to adjust them. Good fortune was I could use my shims in 2 of the other valves and only had to buy 1 shim for $5. You can make the needed tools yourself with a large screwdriver and a small piece of flat stainless steel.