OK, Ray, here's my two cent's worth. My pick for the ultimate compact six cylinder screamer is the twincam Honda 500cc six cylinder engine that was used in the GP bikes Honda campaigned in the 60's with Mike Hailwood riding them far beyond the limits of their rather insubstantial frames and winding the little monsters to about 14,000 rpm while running away from most of the competition. Honda later enlarged and civilized this basic engine design and used it in the CBX 6-cyl street bike in the early 80's.
