Hi Erwin G
I bought a 2012 model last year ( no 70 )
I had the same problem and was told they all do that, you need a new hub. Then I looked at the price of a hub !!!!!
After sitting down and giving the problem a lot of thought and measuring, I came up with a relatively simple spacer that solved it for good.
A Saturday spent working on it and job done, this was last year and I fitted a Supermax sprocket at the same time. Total cost a piece of Alloy bar and my time. The belt runs exactly on the sprocket now.
PM me if you want pictures and details.
Ian
