best piston shape for motorcycle?

[galang r]

for a normal dished 2 valves combustion chamber. The bike comes with flat piston.
looking for performance increase. And how bout altering my combustion chamber, what you think is best shape for it.
its 196 cc 4 stroke SOHC 16.7 HP Honda. Honda GL 200 S . Branded as Honda Tiger, Indonesian Production. I bet you never heard of it lol

Heard something bout dome piston, it add compression. But i fear it will disrupt with combustion.
i can get dome piston that perfectly fit for this bike. Its lower cc version of the honda tiger and it has the same bore size but lesser stroke.

[bikerphilosopy]

mill .005 off the head, use stock dish. Port polish swirl head

[desert camel]

name of the bike would help...you cant really change the piston shape without changing the combustion chamber...forget about it...
port and pollish inlet and exsaust ports,even bigger valves may be possable

[outremerknight]

Don't fit the domed piston unless you have the clearance. The dome might, probably will, interfere with the valves and you'll end up with   bent valve stems and a knackered engine.