I know there was a couple of changes, and I believe it's right around the 40000 VIN # and again around the 55000 VIN #. Older than 40000, should be the same for Trophy's, Trident, Daytona, Sprint. Other than the length of the sidestand itself. But than again, the '91's being the 1'st year in production, might be diff also. You could try Baxter's (
www.baxtercycle.com) for a replacement off a breaker for the year you need.
Hope this helps.
Erv
Deep in the Heart of Texas!!