Luis,
I have used a set of TKC 80's to 5000 KM mostly 2-up and luggage, mixed dirt/pavement 20/80% approx. No problems! I never took them in rocks or ledges, but did experience your patterned look on Karoos on the 950. There is a lot of rear wheel horsepower with these bikes. I used the 140 rear however and could not tell If you had a 140 or the 150( I think they make a 150 radial??) I had used them on a GS ADV as supplied and I too found the compound to be slightly different with 17 vs.18, and 19 vs. 21. Or I should say to my unprofessional mind.
Allen.
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