How Does A Four Stroke Single Cylinder Motor Work?

The qestion that you have typed  has one problem that you have to write engine in place of the motor.
Any way as the  name implies it has one engine depend upon the requirement. And having four cylinder or may be any.
But the basic principle remains the same.
It consist of the cylinder in which there is one piston as the major component for your understanding!!
Now the cylinder has two valves  one for the suction andthe other for the exhaust.
During the starting we providing the initial effort through our leg which is called as the cranking so as we do the same the piston moves down and the vaccume is created in the cylinder which is called as the suction stroke and the  fuel or the mixture of the air -fuel enters the cylinder  and due to the inertia the piston moves up and compresses the fuel and in the diesel it gets ignited it self as high temp. Is generated due to compression and in the petrol engine the mixture get the ignition from the sparkplug with the help of the spark and as the ignition start the exhaust gets  pressurised  and expands in the small space of the cylinder which produces tremendous pressure on the piston and the piston moves down produces the power stroke now the flywheel accumilate this high energy and it uses for the gases during the power stroke and this way the entire cycle is repeated.
The initial stroke called-suction
Second -compression
Third-expansion
Fourth- exhust

Got it!

A single cylinder four stroke engine also known as a one-lunger works in pretty much the same way as a four stroke engine does. It has the advantage of being economical and the disadvantage of providing lower power to weight ratios.

The one-lunger as its name suggests goes through a cycle of four steps. The first stroke consists of the intake stroke where the fuel air mixture enters the chamber as the piston moves towards the crank. The second is the compression stroke where the intake valve closes and the piston compresses the fuel air mixture in the chamber. Then comes the ignition stroke where the fuel air mixture is ignited and pressure forces the piston to move outwards and finally the exhaust stroke where the spent exhaust leaves the chamber through the exhaust valve and another cycle begins.

Jut moy b

Engine not starting