Regarding final gear ratio, with the 20 tooth front sprocket, 42, rear, and a 23-1/2" diameter tire, I calculate I can go 152 mph at Loring, Me. at 8500 RPM, no slippage. At Bonneville, with 4% slippage, 146 mph, 151 at 8800 rpm. That should do it, if I have the hp and can make myself a little smaller. There's always nitrous oxide.....
Dennis, Yes you can see exhaust valve damage on the piston. That is the result of the overrev I got at Loring when the primary chain broke. It also bent the valve, pushrod, and tappet.
Tom