Right my s2 dropped a valve on a zvh conversion, it totalled the head and put a nice hole in the piston the rest of the engine is ok and the bore is only slightly scored. Could i just bore that one cylinder and get an oversized piston so that i can use it again?

 

should be able to but as seen as you got it in pieces bore the four and put 4 oversized pistons in while your at it giving you that extra power at the same time