Jims Piston Jet Test Stand For Harley Milwaukee-Eight Work smarter, not harder! This Piston Jet Tester will eliminate the guessing game when it comes to installing new or used piston jets into a motor. This prevents and avoids from putting in brittle, gummed up, or even defective piston jets that will cause piston damage. Testing can be executed with air or oil. Features: Assists to determine if piston jet is stuck open or close Allows the engine rebuilder to remove jet of all assembly lubes, verify PSI number the jet switches to on, and visualizes spray pattern prior to the cases being sealed Avoids defective piston jets to save your engine