Driving home from picking up my new to me Classic VX I lost a front brake caliper bolt. The second bolt was still there but quite loose already. So my 120 miles trip home was cut short after about 10 miles and ended on a recovery vehicle. After some research I found it's a 7/16 x 1-1/4 UNF bolt plus washer. In my case the washer on the bolt that I didn't loose seems to be an M12. I will replace that with a 7/16 once I get them. To my surprise there was a very thin washer between the caliper and upright, also about 7/16 (or 11mm) ID and about 1'' (or about 25mm) OD by 0.8mm (1/32?) I checked a build manual of the 1990s and couldn't find anything about that washer or shim. Trying to find that shim seems to be impossible, at least for me. I couldn't find a 11mm ID and about 25mm OD washer at all. What do people use in that place if anything at all? Maybe I'm just looking in the wrong place? Cheers Andi