I do have 2 USED Honda CB750 K Voltage Regulators. I cleaned them up, removed the 2 cover screws, (which still had the Red Paint on them, that showed that the covers had never been taken off before), and checked the Core and Points Gaps. Both units were within Factory Specs. The only way that they can be tested, is to install each one on a CB750K, start the bike, and check for the Appropriate Voltage at different RPMs. My two CB750K Honda Choppers are currently Not Running. So I couldn't test them to see if they are both OK. If you are still interested in buying them, please let me know. Thanks.