To be complete on the story: I had the chains sent back to the importer to do some research. I told them that the previous ones were ok but the last order was giving me massive problems as I had sold several to other riders also. Even the triple row chain was havin this symptom. But when I got the "report" back it stated that the production was of the highest standard and haven't been changed. The problem was to be found in the fact that the cranks or clutchspindels on our bikes weren't straight. This would cause at some points too much stress on the chain. And the sprockets on the crank and clutch probably weren't in line. Between the lines it came down to it that everything was to blame but the chain and to avoid this you would have to give the chain some run-in time. When I sent him a message back, no reply whatsoever. So now I am going to use Iwis. I sent some to the factory and it would be sorted out to ensure I would get the correct chain.
Oh yeah, there is a difference in quality when buying chains like these. There is the industrial quality and automotive quality, you shoul have the last one as these are supposed to handle variations in speed and load better.
