northumbrian Posted July 23, 2018 Report Share Posted July 23, 2018 (edited) As in title, after last long trial, noticed I had lost a rear sprocket bolt, in its escape it has worn the swinging arm . It has cut a slot in the flat plate area, approx 50% through...... My thinking is to get it aluminium welded and dressed back, anyone had similar?..... what was your action? any idea on what grade aluminium is used on the swinging arm.? thanks (it’s a Montesa 4 ride ) Edited July 24, 2018 by northumbrian Quote Link to comment Share on other sites More sharing options...
copemech Posted July 24, 2018 Report Share Posted July 24, 2018 Not uncommon. Yep, weld it up! Quote Link to comment Share on other sites More sharing options...
ourian Posted July 24, 2018 Report Share Posted July 24, 2018 (edited) Yes happened to me, as above yep weld it up, I think the filler rod I used was 4036 but don't quote me on that LINK Edited July 24, 2018 by ourian Quote Link to comment Share on other sites More sharing options...
northumbrian Posted July 24, 2018 Author Report Share Posted July 24, 2018 Cheers guys, welded up, and all back together, even got my shock spring changed for a heavier one when the swinging arm was out all is well again ! 1 Quote Link to comment Share on other sites More sharing options...
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