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 too much material away. This will work with 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.