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...
Yes and I wish we still had the rocker arms and solid tappets. A breeze to work on. Those old engines could sustain ungodly RPMs too, couldn't hurt the bottom end, could crank it until you floated a valve.
I agree,Triumph should have been more faithfull to the original and use the longer stroke and pushrod instead of overhead cam design.If Harley can design a reliable pushrod v-twin,you think Triumph would be able to do the same with the parallel twin.Plus the look of the heads on the original looks ten times better than the valve covers on the 790, which look like something that came off a 80's Jap bike.
