Quote:

The original 650 had a stroke of 3.22 inches compared to the 2.68 inch stroke of the 790



Didn't the earlier generation use rocker arms? Overhead cams with shim and bucket valve actuation probably make the motor taller overall. Maybe that's why the stroke was shortened. Don't know for sure, just thinkin' out loud...

'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy