Gen 1 - slight clonk from rear.

[JayB]

Never had to adjust a chain on the Gen 1. They do like to run very loose. It will sit on the top of the rubber shield on the top of the swingarm at the end nearest to the front sprocket with the bike on the centrestand. With care an original chain and sprockets will do in excess of 30,000 miles.

Mike, thanks, yes I think mine was a bit tight for the tighter sections, where my bike was one of 3 the previous owner had it had sat idle for some long periods of time. It does appear to be the original set but if so has worn very well indeed. It was too loose when I bought it too, but I went too far. I normally adjust chains and then check there is still an inch of free play with me sat on the bike.
I am considering changing the set as these tighter bits don't seem to want to free up.