13-05-2013, 10:14 PM
(13-05-2013, 05:29 AM)cully Wrote: @tom go read up on your 4 stroke cycle, both valves are only open for a very short time
one or the other valve is open for a far longer duration
I'm aware of that, but I thought when the belt broke, there would still be momentum so the other valve would hit as well rather than it just stopping dead?