Here's a link to a page from the
SUDCO catalog. I showes Triumphs using a 25mm shim which I seem to remember reading someplace else. I think this only applies to the 'shim over bucket' such as yours. (2001 and earlier engines) It showes the other models of bikes that use the same shim. Pretty common size.
P.S. You need Adobe reader for the above link.
CYCLE DEPOT has the shim you're looking for in the Parts Unlimited catalog. Price was $4.46 EA
BOLD = LINK
[ This message was edited by: Stlakid on 2006-12-03 19:00 ]