Have changed the top and bottom shock mounts and bushings on my frame twice in past year and still there is an annoying amount of play seeming to be coming from the top mount when I lift the frame relative to the back wheel. it's doign my head in. All other bearings recently replaced and checked and all properly secured at pivot points. All shock mountings cleaned and assembled correctly - and only thing I can think of is that the threaded bar that fits the shock onto the frame is worn somehow to create the looseness. There seems to be a bit of wear and marking on the surface of this part but it does not seem enough to be creating this. Any suggestions?
it's an 09 Iron Horse mk111 frame by the way so I'm S**t outta luck to go back to manufacturer to get this addressed
Can you try another shock in it?
Have you replaced the 'hula hoop' eyelet bushings on the shock?
Have you put your finger at different points to try and feel exactly where the play is?
I'm in Edinburgh, if you're anywhere near me you can pop in and I'll have a look 😯
Hard to say, however having a really good look and feel and also listeing for any noise is the best advice I can give you 😀
if the play is coming back a short time after changing out the DU bush, then there's a good chance you've rounded the shock eyelet itself.
Not the end of the world though, coke can (or similar) shim, normal DU bush, then your normal reducers and it'll be solid for ages. Admittedly it wont help the resale value, but there ya go
try tightening the bolt as tight as you can, some bikes have slack mount tolerances
common problem ,measure the gap in the frame with verniers ,ring tftuned and get a hd mount made to suit .
cheers for the info folks - thanks for the offer Kaesae but its definately originating from the top shock mount as holding this steady with hand removes it when lifting and dropping the rear wheel.
Legend - I thought about possibly trying a wee shim in it but no way there is enough space between the replaceable mount and the mounting pin to allow a shim even as thin as a coke can sliver to fit in there. Its mental how such a small gap seems to be magnified on the bike!
Foxman - thanks for this advice - didnt know TF would do this but might give them a call and see. I guess I could also contact local precision engineering company for same?
Sounds like a DU bushing to me and if you've changed that? Ovalised the mount would be next on the list.