
VERTEX Ring Set Ø40.3 mm — a ring set designed for urban 50 cm³ engines. Made by VERTEX, this kit provides the essential sealing elements between the piston and cylinder: compression rings and oil control ring to manage compression and oil consumption. An essential replacement part during an engine overhaul, re-boring, or preventive maintenance to restore a clean and responsive engine performance in the city.
Compatible with several mini-trails and 50 cc mopeds: always check the piston diameter and the maintenance manual before installation. Examples of commonly fitted models:
Installation tips for mechanic bikers: thoroughly clean the grooves and piston, check the end-gap and the condition of the cylinder before installation, replace the rings in stages to avoid compression loss. If necessary, have the installation done by a workshop for precise adjustments and proper bedding-in.