[iamz]

If someone has $20k or more to spend on "an American sport bike", and you just can't stand the Sporster based engine in the Buell XB's, just buy a Buell XB9 for what,.... about $9000, and drop any damn engine you want into the frame. Hell, you could probably pay someone to do it for ya and still come in under $20k. There you go. Who's first?

 

[iamz]

I figure a lot of engines are stressed members so mounting another engine wouldn't be all to much trouble. Especially since you wouldn't need the vibration damping mounts for the Sportster motor. I forgot about the swingarm mounted to the engine though. Hmmmmm,....well, nothing that money can't solve.