If the chain was in good fettle my thoughts lean towards the bracket due to vibration failing prior to the chain derailmeant. And thus infact causing it. My 90 degree.bracket made 3mm steel L section.

I can use it to roll the rear wheel up into the swingarm when fitting the rear wheel. It is solid.

Id be dubious about using ali. Tenere weighs a ton anyway.

Just my 2p

__________________
To boldly go where no Tenere has gone before.