i got a 185 motor,its got a good transmission good bottom end.the only thing wrong is it broke a valve.theres nothing inside the motor as far as debris,my question is approximately how much would it cost to get it bored out and to what size would i go to.also what would be a ball park price for a piston and would i need to replace anything else?

 

You can go to about 200 cc (3rd overbore) Ebay has complete rebiulds for about 200.00 you send your parts, they send you new / reconditioned jug piston, head, you install via honda manual, your good to go.