The way a leak down test works is fairly simple. Put motorcycle in high gear and have a helper apply rear brake.
Schnitz Engine Leak Down Test Kit
Motorcycle leak down test. Make sure this fits by entering your model number. A moisture free air supply of 70 psi to 200 psi is required. A leak down test works by pressurizing the crankcase cavity and cylinder. With the piston just shy of tdc and the valves closed compression stroke air pressurizes the cylinder to a defined pressure which is recorded by a pressure gauge. The drill is this. Set the engine at top dead center and attach the leak down tester hose to the sparkplug hole.
A leak down test involves pressurizing the cylinders while the engine is a top dead center tdc. Refer to your service manualfor this procedure. A second pressure gauge is used to monitor the amount of air escaping the combustion chamber. In this position all the valves will be closed and the only places where pressure can escape is through. Regulate leak down. Aircraft mechanics have used this test for a long time.
Remove schrader valve from compression tester hose and insert into plug hole. How to perform a motorcycle leak down test. How to perform a motorcycle leak down test bring engine to top dead center tdc. Leak down testing is simply measuring the rate of air leakage past the rings and valves of an engine. This kit is supplied with a cylinder leakage tester three adapter hoses 10mm 12mm 14mm and carrying case. A plug is inserted into the intake manifold and another plug or block off plate is used on the exhaust to create an airtight cavity.
A small air pump is used to pressurize the cavity to 5psi and the pressure is monitored in the cavity for around five minutes. Lock the crankshaft in place. Remove schrader valve from compression tester hose and insert into plug hole. Leak down tests can also be used for motorcycles that feature decompression mechanisms 2 strokes. Pit posse pp2723 leak down tester motorcycle tool. Refer to your service manual for this procedure.
Bring engine to top dead center tdc. Designed to check the amount of cylinder leakage in a 4 stroke engine with an air source of 70 to150 psi this system will pressurize the cylinder with 60 psi of air gauge will register the. The motion pro leak down tester is designed to check the percentage of cylinder leakage in a 4 stroke engine. Hook up leak down tester to 40psi shop air supply. The less air leakage the better.
Gallery of Motorcycle Leak Down Test
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