Tried to do a little search on 530 chain clearance & rub issues, to chain guard, and chain guide. Were 530 chain & sprockets O.E. on 1rst year '72 Jackpiner ? Trying to keep it original as it has O.E. alum. front & back fenders, and original Radaelli steel rims. Search board is locked down for some reason.
Early Jackpiners were 530 but heavy, hurt revs, and overkill. Most everyone switched to 520 including eventually the factory.
Larry P