While poking around the HD parts site I came across the specs for the new M8 S/E 515 cam. The advertised specs for duration, lift and timing are slightly different for each of the front and rear cylinder.
What would be the reasoning behind this?
What are the engineers achieving by having what is essentially a cam for the front cylinder and one for the rear cylinder?
Hoping the pro engine builders on this site can explain in layman terms, just because my curiosity needs to know.

Thanks

Jerry

 

If the firing cylinder timing and exhaust pipes could be made symmetrical, the cylinder fill and emptying would balance out.. Since it's a 45 degree V twin on a shared crank pin, cylinder fill / emptying is different.