- Dec 13, 2005
Does anyone know if a 530 O-ring chain will fit on the 74 850 Norton without modifications.
Modern 520 o-ring chains have a tensile strength of around 7500 lb, which should be more than enough for our old Nortons. If I'm not mistaken Derek Wilson has been riding his Commando with a 520 conversion for a couple of years now with no problems, and he puts a lot of miles on his bike.frankdamp said:I had a nasty experience with 1/4-inch chains. The first two prototypes had them. When we were doing endurance testing at high speeds (100 mph for 10 hours, with just rider change-over and fuel every 2 hours) we were making chain adjustments at every other fuel stop (400 miles).