On my recently acquired ‘76 XS650C, the p.o. installed a swing arm brace - it may be a Joe Wiseguy swing arm / brace. I noticed that if there is any slack in the chain, the chain will rub on the top of the brace. Worried long term about damage to the swing arm and chain. Had anyone had this problem and what did you do to protect the swing arm? The p.o. stuck a piece of pvc pipe on the arm where the chain would rub. The chain had already worn grooves in the pvc so this isn’t a good long term solution. I’ll try to post pics tomorrow. Thx