Internal mods on a 5A motor

[Flashmn]

I dont think porting is really that great, mototune has a great article about it, and when you think about it, its really logical too. Check it out.
http://www.mototuneusa.com/think_fast.htm

Wiseco makes good pistons

[PPW-546]

i'd say it makes sense. I shoul've kept my original port size for my 5A motor. But i felt a gain in HP since it responds faster now after porting but i haven't got the chance to take it to a dyno yet. Anyway, thanks for the advice and I'll look into the Wiseco lineup.