I’ve got this intermittant grinding or rattling noise from the rear, seems to be the disc brack area, on my 1989/90 Big Bear FW. It seems more prevalent riding up hill, or at med speed on flat, gravel. It goes away immediately if I tap the rear brake lever, but back again soon after.

I’ve completely rebuilt the rear brake, new pads and setup to the service manual, but can’t stop it.

Here’s the bike from my weekend hunting trip.

https://www.dropbox.com/s/0dnbnw089e…00473.JPG?dl=0

Here’s our target species – Wallaby.

https://www.dropbox.com/s/v2udryr2nk…00476.JPG?dl=0