The item "Piston rings 4T 47.25 mm Delta TATA" is a set of piston rings for Delta mopeds. The rings seal the piston in the cylinder: they hold compression and keep oil out of the combustion chamber.
Replacement is needed when compression drops, hot starts are difficult, oil consumption rises, and there is bluish smoke. The size is chosen by piston diameter. Manufacturer: TATA. When replacing, inspect the neighboring parts of the assembly: they often wear out together. Not sure whether the part will fit? Call the workshop and we will help you choose.
