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.

Things You'll Need

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

  • Ensure the piston is at the bottom of the cylinder.

  • 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.


  • Photo Credit engine image by peter Hires Images from
Promoted By Zergnet


You May Also Like

  • How to Calculate Stroke Volume

    Stroke volume is the amount of blood ejected from the left ventricle of the heart during contraction. It usually measures between 60...

  • How to Figure Bore-to-Stroke Ratio

    In a piston engine, the "bore-to-stroke ratio" describes the relationship between the cylinder bore and the piston stroke. Bore-to-stroke ratio often aids...

  • What Is the Bore in an Air Cylinder?

    The interior diameter of an air cylinder equals its bore. This measurement helps determine the use and maintenance needs of a particular...

  • How to Set Timing on a 4 Stroke 1 Cylinder Engine

    Small four-stroke, single-cylinder engines can typically be found in lawnmowers, compressors, water pumps and generators. Simple in design and function, they can...

  • How to Measure a Cylinder Bore

    For an engine to operate at peak efficiency, the cylinders that the pistons move in must be smooth and not be much...

  • How to Bore Out an Engine Cylinder

    As engines get used, over time their cylinders become worn out. This wear and tear results from the ongoing friction stresses created...

  • How to Measure Center Bore

    The machined center bore of a wheel determines the type of vehicle a wheel will fit. A center bore not matched to...

Related Searches

Read Article

How to Clean Your Car Headlights

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!