Jeff---Take a minute and explain to me how the "gearless" aspect of this engine works please. I assume that the intake valve is atmospheric, so needs no cam to activate it. Normally, on a 4 stroke engine with a cam, the exhaust valve opens every OTHER stroke, so the cam activating it needs to run at 1/2 the speed of the crankshaft. Without gears to give this 1:2 ratio, how is the exhaust valve opening at the correct time managed?---Brian