Seems to me the XS650 swingarm pivot could be improved.
Some XS650s I've worked on have had the pivot tube turning with the swingarm because there's very little stopping it moving, only the frame squeezing on it's ends and only that if it's been assembled correctly.
This leaves the de-facto swingarm "bearing" to be the tube's bore turning on the throughbolt's outside diameter.
That's steel on steel and was never designed to be a bearing fit anyway.
How about replacing the pivot tube and throughbolt with a big fat throughbolt with a hardened and ground outer diameter that fits the swingarm bushings.
Bore the frame to suit with a locking block on the bolt's head and a Nylok nut on the tail to control the end float?
Comments?
Some XS650s I've worked on have had the pivot tube turning with the swingarm because there's very little stopping it moving, only the frame squeezing on it's ends and only that if it's been assembled correctly.
This leaves the de-facto swingarm "bearing" to be the tube's bore turning on the throughbolt's outside diameter.
That's steel on steel and was never designed to be a bearing fit anyway.
How about replacing the pivot tube and throughbolt with a big fat throughbolt with a hardened and ground outer diameter that fits the swingarm bushings.
Bore the frame to suit with a locking block on the bolt's head and a Nylok nut on the tail to control the end float?
Comments?