OK Folks, I'm posting this EBay link here because of the guys claims that the Suzuki RF 600 swing arm fits our bikes,( straight bolt in ? ) with just a small modification to the shock mount :ponder:
If it's true it would be an easier way to get a 17" wheel in the rear ! ( RF 600 wheel is 17" )
Check it out http://www.ebay.co.uk/itm/yamaha-xj600s ... SwsB9WDDAe