isn't the XR all revs and buzzy vibrations ?
I ragged the road bike one to death for 120 miles, hated every single moment.... I never found a best bit, but "tank slapping all the way to 140mph" was prevalent every time you turned the twist grip. And it had absolutely nothing below 8k and was very hard work waiting for it to get to the other side of 8k.... if I remember it only made any usable grunt after 9k and usually by then it was lock to lock multi lane weave....
and why is it all their 4 cyl bikes feel like there's no oil in the engine? you can hear and feel every rev scrapping metal off, its like every clearance is half what it supposed to be...