ONCE AGAIN. With a axle adjuster.
Tube frame Buell swingarm
The bearing problems with tube frame Buell transmissions was a over tightening of the belt by owners/incompetent mechanics problem.
Thinking back. It seems like the tube frame mounted the swing arm pivot a couple inches further aft than the fuel frames. That was part of the belt problem too as I recall. Do to the pivot point, the rear pulley arc was "exaggerated" compared to what it is in the fuel frames with the swing arm pivoting closer to the front sprocket.
Even the New Harley XR1200 uses a tensioner instead of a adjustable axle.
XR1200
Did you take the tensioner pulley off your timing belt yet?