:waving:Welcome and Hello . Did you install a wider tire ? Also some brands are wider even in the same size code . The Goldwing calls for a reinforced sidewall tire to get the correct weight rating . If you did not get that tire a lesser tire may mushroom out under load and rub .
Aside all that , you can remove the arm and put a slight bend in it where is is closest to the tire .
On my 83I ,I run a 150/80HB 16 RR Avon . IT is wider and shorter than the stock 140/90 . I had to bend my brake arm to provide clearance . It has been no problem .
Had the same problem on my 82. Shop put a slight bend on the torque arm, no more rubbing. Bad news isI already lost faith in that tire. It only had 2K on it. Replaced it with the same size, just different model. Bad tire was a Dunlop Qualifier, new one was Dunlop 404s. Big difference in width.