[captainmish]

Hello folks

My SLR650's rear shock seems to have gone a bit spongy, and I'm hoping theres an easy fix for it.. When I bought the bike about 5 months ago, I sat on it in the showroom and it peed oil all over the showroom floor - they had it reconditioned before I bought it.

It seems theres now a lot more travel, and if Im going quickly and hit a bump, it feels like it clangs or bottoms out a bit.
Is there a way to top up the oil in the rear shock, or somehow adjust it. I can see there are 2 "square toothed" rings that seem to lock together to adjust something - is this preload? It would be good to get that done too, as the bike is a bit short for me at the moment.
Failing any of that, Ive seen a new one for sale for £100, is it reasonably easy to change?

Thanks for any suggestions!