Using the G4555 2 - Stroke Cycle Bridge Bracket is easy. First, attach it to your 2 - inch Dial Indicator with the thumbscrew. Then, carefully position it on the engine to remove the head. When checking port and ignition timing or doing a port timing light check, make sure the bracket is firmly in place. As for maintenance, keep it clean from dirt and debris. After each use, wipe it down with a dry cloth. Store it in a cool, dry place to prevent corrosion. Also, check the thumbscrew regularly to ensure it's tightened properly.