Looking for pistons

I Have a small bore car. 2.7 inches. 
what motorcycles have about that bore?  

I'm presuming you are looking for 4-stroke pistons, not 2-stroke? Do you need 2 valve reliefs or 4?  I don't know for certain, my own bikes jump from 49mm (250cc four) to 79mm bore (350cc single) and 80mm bore (550cc twin.)  My best advice is to look at older (less oversquare 70's/80's bikes) 200ish cc singles, 350-400ish cc twins, or 750ish fours. If you go more modern (more oversquare) you might need to adjust the displacement down to 150ish/300ish/600ish. Hope this helps!

250cc singles around that. Look at an xr or XL 250 maybe

In reply to bearmtnmartin :n

there are sites that sell pistons for cars Summit racing, Jegs, Speedway etc  that give bore pin size, combustion chamber, etc 

are there similar sites for motor cycles?  where will I find them?  

In reply to ae86andkp61 :

Yes, a simple flat top  for a 4 stroke motor.