I say if you want more inches stroke it
And I happily do it regularly

However... people sook and say the A15 doesn't rev like a 14 .... so whats your theory on a longer stroke ?

I think the torque is a bonus
I don't like revving the nipples off my gear anyway
I only rev my A15 to 7600 when I know it can and does go alot higher.
After a point though it makes less power and more noise and not much else