Well CanberraR3,
I'm thinking I may be able to buy the wheel and tire and perhaps do the steelwork mods myself in my garage. However upon closer examination the drive shaft side would be a nightmare to pull out further from the centre line and U-joints would have to be added which may fail with the amount of HP our bikes deliver. The RHS where the disc brake is on, that's relatively easy, just by stepping the yoke out, away from the centre line of the frame.
Has anyone experimented by fitting a wider motorbike (not car) tire to the rear, perhaps not a 360 but something between a 240 and a 360 to the stock rim? I know with cars you can play around with many different width tyres on the same rim.
Any ideas?