Derek you're on the right track but there's more.
Thanks to all for the input...I sussed it with a combo of what you guys were saying and a bit more.
No offence intended to you wise ones but my breakthrough was to look at non Duc sources for flat belt alignment info.
I found this gem. http://www.lhup.edu/~dsimanek/scenario/crowning.htm
For those interested, make sure you go to the next page for the explanations.
Was a bit hard for a bloke who struggled with maths and physics but it slowly made sense.
I have now shimmed under the inner belt cover in a way that was counterintuitive to what I had been thinking.
For now I just want to get enough of the bits back on the bike to run it up to its first heat cycle for retightening the heads.
But after that when I have to pull it all apart again I'll take some pics to show you the shimming that straightened everything up and has the belt running down the middle of the pulleys.
The pipes are back on, the electrics connected and back on charge and I'll connect up the fuel shortly ready for the start up.
Thanks again.
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