- Motion Pro designed test tool to pressurize motorcycle or ATV cooling system to check for leaks. - Tests radiator and radiator cap for leaks and correct pressure release limit. - Use with a common hand pump to pressurize a non-running system (pump not included). - Unique design allows you to test the cooling system on a running engine to check for leaks or excessive pressure when system is hot. - Remote; accurate; easy to read gauge makes readings and diagnosis easy. - Unique radiator adapter will work with most motorcycle; ATV and UTV applications equipped with a 30 mm spout. - Measure your radiator neck to confirm correct size for your application. Note: A common hand pump; to pressurize a non-running system; must be used on a non-running engine. This pump is not included. Note: See 938065 for type-B adapter to measure your radiator neck to confirm correct size for your application.