The numbers on the inside of a piston typically indicate the manufacturer's part number, the piston size or diameter, and sometimes the model or engine specification it is designed for. These numbers help ensure compatibility with specific engines and can include measurements for compression height or valve reliefs. Additionally, they may contain information regarding material properties or manufacturing standards.
Piston rings are always installed with the numbers up toward the top of the piston
The cylinder, is the body of the engine that has been bored out in order to place a piston inside of it. The piston rides inside the cylinder.
The piston moves up and down inside the engine cylinder.
Increasing the pressure inside the piston cylinder would cause the piston to lower since the higher pressure pushes down on the piston.
A piston is a plunger, or a plug that moves inside a cube, a cylinder. The piston diameter is the diameter of this plunger/plug. It's a tiny bit smaller than the diameter of the cylinder the piston moves in.
Decreasing the pressure inside the container or increasing the weight on top of the piston would cause the freely moving piston to lower.
Piston
Think about what happens to the gas (air) inside the syringe when the temperature decreases. As the gas cools it will occupy a smaller volume and thus the syringe plunger will move DOWN the barrel.
1 to 4 , front to rear
0.057, the two numbers following the MBH is the piston size
I believe that you are talking about the piston.
That is a stock bore 93-01 KX250 Piston. The part number 617M06640 is a Wiseco number. I know as I have the same bike and this is the piston kit I used. Very good piston. Do not be suckered into a single ring piston as it will not last as long.