assuming a10 forks... Interesting you say it previously fitted – I’m surprised. That looks like a later (69?) triumph TLS with the more agreeable cable angle. I fitted one last year. The usual routine is to build out the slot on the brake plate to meet the lug on the a10 forks because the fork spacing and hubs varied across years and models – a10, a65s and later 69 triumphs had 6 ¾” fork spacing but earlier triumphs had 6 ½” spacing. 68 a65 forks are particularly weird.
there should be no washer/spacer between the inside of the brake plate and the bearing housing/retainer. if building up the lug was not done then maybe someone packed out the plate with a spacer? That would be concerning as reduce the linings' contact area. Or maybe they just hoped the minimal contact between slot and log held… yikes.
The a10 spindle fits the triumph tls brake plate and hub (not the conical). Also your comment:
The front spindle is self aligning is it not with relief for the bolts
Is strange as, while no expert, the spindles I’ve encountered have slots to locate the end-cap bolts. Is it the right spindle?
Have a look here and see if my previous confusion and summary is relevant.
https://www.a7a10.net/forum/index.php?topic=15533.msg132080#msg132080EDIT: OK I’ve just noticed that looks like a full width a10 hub… is it? The triumph tls plate has wider brake shoes. Maybe someone put in a spacer between the hub bearing retainer and the tls brake plate to hold the plate out so the linings don’t grind themselves to death on the spokes, while also ensuing the lug and slot mate better. That sounds a bit scary.