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Advice please. Recently I've noticed when going over bumps/dips I hear a loud clonk from the back end. Had a good look round, nothing loose, leaking, sagging, scraping, sidestand seems ok. Can't replicate it by bouncing the bike at standstill. Had a look round the Forum, could it be the cat or drive related? Anything I should be worrying about?
Cheers. Glenn.

wearing a hole in your hugger?
exhaust seated on the flanges ok?
rear shock bolts tight?
tool kit loose?

No, yes, yes and no as far as I can tell...
Thanks. Glenn.

I had that when my torque arm was either loosely fitted at one end or the other time when te rubber had persihed

Torque arm solid enough...
Thanks.

Worn brake pads rattling in the calipers?

Shagged Showa shock?

if you have a centrestand and the stop has come off/doesn't have one it will bang on torque arm over bumps?

Thanks for the suggestions...

Paul:
Don't think so, not that kind of 'clonk'..? It's quite loud, and - maybe my imagination - getting louder?

Oyster:
Maybe? But I can't replicate it at standstill or around <10mph.
I'm taking it a bit cautiously 'til I know what it is, so it's hard to know whether the handling is particularly affected. We had a good (albeit clonky!) run to/from Cadwell today though.

Tripe:
Sidestand only and the stop is fine. No sign of it rubbing against the bellypan either. Had my mates take a look on the ride out today, nothing obvious to them on the move.

Glenn

if you've still got the cat, then it's common for the innards to come loose with age - that'll clonk over bumps.

If you still have the cat then I would not think it possible that the cans have slipped off the mounting posts the way they might do with a y-piece. If you cannot move anything loose by hand, then I would suggest the next most likely thing, given that you mention bumps/dips is that the shock has lost its damping. At a standstill the spring still has enough effect to avoid bottoming out, but pick up the pace and the forces involved allow it to compress and extend at considerable rates with no damping to slow things down.

Thanks r550s & Me-109. Got the bike booked for a service on the 18th. Let's hope it holds out 'til then...
I'll let you know the outcome...
Cheers. Glenn

Mystery clonk... solved!

Just needed a little torque on the frame rail bolts.


Thanks for all your help and suggestions!
Cheers. Glenn