Crankshatfs, good performance???

[blasterdubai]

Hi
I was thinking of getting a +4mm hot rods crankshaft, but i wanted to ask you guys if any of you have tried it and what effect did it have on your bike, (blaster of course...).
Thanks

 

[Zwiser]

Um well it makes the throttle response better and you have to trench the cases for it to fit and you should get it ported to match the advance