The item "Piston rings (set) Delta 110 cc, Active" is a set of piston rings for Delta mopeds (Active is also mentioned in the name). 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. Available options in the listing:
- Standard 52.4 mm (item no. 0085)
- 1st oversize 52.4 + 0.25 mm (item no. 0086)
