https://www.indianaopenwheel.com/pic...pictureid=2925 a standard esslinger port. Can't see much intake valve here?

Esslinger xl head now we can see more than 50% of the intake valve https://www.indianaopenwheel.com/pic...pictureid=2924


Stock motorcycle head now we can see darned near all of both of the intake valves. As the amount of valve or valves uncovered gets larger so does the power output per cc that the engine will produce. https://www.indianaopenwheel.com/pic...pictureid=2926




Honest Dad himself