STROKE

                                            STROKE

There were always some or the other terms that were mentioned but I never understood what it actually meant. And one such term was over square engine and its similar terms like under square engine. I never knew what it really meant, but I assumed it must be something related to the engine.

So, here I am, trying to write down what exactly these terms mean and by what way it benefits the rider. The engine size or capacity is generally the amount of the space the combustion chamber displaces and is measured in cc’s as we all are familiar with 220cc, 150cc engines mounted in various bikes.

The engine capacity is measured as Bore x Stroke. Here, Bore is the diameter of the cylindrical block and Stroke is the depth of the cylindrical block, as shown in the image.

The ratio of Bore and Stroke categorizes the engine. There are three different types of configuration available depending on the ratio