Koni shocks were the go back in the day, now Ikon shocks and the good thing they are rebuildable, i brought my Koni shocks for my Norton in 1978 and only rebuilt them about 12 years ago, the rebuild kit cost $40 from Ikon and wasn't a hard job to do 1 1/2 hrs for the first one, 30 mins for the second one.
Ashley