Listen closely and you can hear it…

What is the smartest way to tune a small engine after a complete rebuild?! 🤯⚙️
When mechanics finish rebuilding a 2-stroke motorcycle, go-kart, or ATV engine, they never just add fuel and instantly kickstart it. If an internal bearing is bound up, if the port timing is off, or if the metal piston rings aren't seated correctly in the cylinder, starting it will instantly destroy the block!
To safely tune and verify their work, mechanics will rotate the heavy crankshaft manually. By hooking an electric impact drill directly to the flywheel nut, they can rapidly spin the entire rotating assembly! This brilliant diagnostic hack allows them to physically watch the piston clear the cylinder walls, verify that the two-stroke port timing is perfectly aligned for maximum horsepower, and guarantee there is zero internal friction before the spark plug ever fires!