Originally Posted by Sid Squid

Is this a 650 or a 1000?

If it is, as I think it is, a 650 there aren't any of the quietening 'scissor gears' on the cams, they're only fitted to the 1000s.

Far more likely is that the camchain tensioners are a little sticky, to make them work again usually doesn't require their replacement, in fact it usually doesn't even require their removal, just the cap removed and the plunger reset.

Please check this very carefully before going any further.

Of course if you do have a 1000, it is a possibility, however the problem was mostly confined to the early TLs, I've not heard of a problem with the SV1000 cam sprockets as they are of a quite different design.