How to measure a cylinder bore & stroke

Written by shane arrington
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How to measure a cylinder bore & stroke
A cylinder's bore and stroke is a key element in determining the power of an engine. (engine image by peter Hires Images from Fotolia.com)

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.

Skill level:
Easy

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Things you need

  • Measuring tape

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Instructions

  1. 1

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

  2. 2

    Ensure the piston is at the bottom of the cylinder.

  3. 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.

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