scratch

Thanks, I used a rotary flap disk and it reduced the high spots, now bearing fits perfectly. Will monitor it as you say.

So assembled, and bearing is uncomfortably tight when inserting bush, bore is slightly out of true after weld repair. Question is how to get it back in true. Machine (how, milling?), file, sand with drill rotary sand attachment?

It has been welded, V cut and welded nearly all the way down, but not to the bottom, one end slightly damaged and built up, so I need to file down. I can feel the original fracture line lip inside, so may try to smooth that lip with a file. Internal diameter seems comparable to other side of arm (as measured with vernier). Will report back.

Photos of the crack. Can anyone recommend a good welder/repair shop. I am Midlands based. be Thanks !

Thanks, it's cracked across the full width of one side of the swing arm.

Hi, I have a similar issue, 2000, Montesa Cota 315R, I have found a crack at one side of the swinging arm pivot point (where the long bolt goes through). The crack runs the length of the bush (aluminium surrounding the bearing). Can this be Veed out and welded? Or? :-(