How to Measure a Cylinder Bore & Stroke

The bore and stroke on a cylinder determines the displacement of an engine, making bore and stroke a key element in determining engine power -- the larger the bore and stroke, the more powerful the engine. Bore and stroke are a combination of two measurements. The bore is determined by the diameter of a cylinder and the stroke is determined by the distance a piston travels up and down inside that cylinder.

STEP 1 - Use your measuring tape to measure the inside diameter of the cylinder. This will give you the cylinder's bore.

STEP 2 - Ensure the piston is at the bottom of the cylinder.

STEP 3 - Measure the distance of the cylinder from the piston at the bottom to the top. This distance the piston travels gives you the cylinder stroke.

THINGS YOU'LL NEED: Measuring tape

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