I picked up my new to me V strom today, its a K6 registered December 2007.
Rode it home 70 odd miles, was surging, and had transmission noise. When I got home I checked the chain, oh boy, if I tried hard I could get both bits past the swing arm, it was like a washing line. I have adjusted it but it is right at the end of its travel to get about 30mm play. I think this was the issue,not surging, chain snatch. I am also thinking this was the noise I was hearing.
Ordered new chain and sprockets plus chain rivit tool, and oil filter, will do all that next week.
It needs a very good clean and degrease, its smothered in grease.
I will have, very shortly, a set of panniers and fixings, GIVI, so will pop them on ebay. They are not bad, some scratches, but no cracks etc, the rails have been "modified" as there is a fixing at the rear between the tubes, very easy to get on and off.
I will update what I do to this bike, as intend to restore it to a condition 100% more than it is now.