Well, Dave beat me to it!! (I saw he was browsing the Forum too - I should've known!)
Usually a 10mm spacer is enough, plus all the mountings on the frame can be loosened and wiggled around a little to move the bodywork about a bit.
As he says, the stock pipes are shocking! Get the jetting set up correctly and the race pipes will be worth their weight in HP!! :)
Andy.
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