That does make sense.
Funny I was just thinking I needed to count the teeth the do the division.
Best to do the degree wheel at this point.
I also have a spreadsheet that give degrees rotation to piston movement.
would need the head off though to be accurate..
just gauging it visually it looks off a considerable amount as the valves appear to be opening and closing at entirely the wrong times.
another funny thing I opened the manual
to check stroke and the spec were right there.
Thanks for all the help.