ProBld GY6 Engine Case Boring Tool - 54mm stud spacing
This ProBld boring tool makes GY6 engine case boring a breeze. Just bolt the tool to your cases with the crankshaft removed, hook your drill (clutch on)up to the tool and adjust to the size desired. You will need to cut a little bit at a time so you don't cut to much material away. This will work 54mm stud spacing only. GY6 A engine cases.
THIS VIDEO IS FOR REFERENCE ON HOW A CASE BORING TOOL WORKS. IT IS NOT THE PROBLD TOOL.