All Kiwi engines are test run for several hours prior to shipping. We have designed a special test fixture that we test run all built engines on. This test fixture also has an additional feature to test the clutch and transmission for operation. While this does take several extra hours on our part, it does allow us to do an initial controlled break in and ensure that everything is operating like it is supposed to be. We monitor engine temps with sensors and as an additional feature we also do a carburetor air/fuel ratio check with a sensor in the exhaust system to ensure the engine is operating within it correct range. Other pics shown are Kiwi engine assembly fixture. Rotates 360 degrees on X and Y axis.