Originally Posted by
Danny Teh
Rsickles,
Get a caliper. The Vzb std and speed crank are different with Arrow's in terms of the crank ID and opening area.
Thats explain the Arrow's awesome top end.
If possible, try running both crank. You will feel the difference.
Arrow is much faster.
I am using the VZ Speed crank. It's too different from the standard VZ/Arrow to even compare.
I am still curious how the crank has different timing over standard VZ?
Forgot to mention the porting of the standard VZ sleeve and Arrow sleeve is slightly different too. Look at the main port between the two transfer ports. It has different dimensions (intentional? I don't know... Maybe they just couldn't easily duplicate it).