Screw Engine M7x42 mm,
for Vespa 50-125/PV/ET3/PK50
Whoever maintains and works on their scooter themselves should make sure a supply of suitable fastenings, gaskets, etc. are available in your workshop all times. What can be more annoying then being in the middle of a complete engine rebuild or similar to be stopped in your tracks by the lack of any particular nut or bolt?
OEM Numbers (for the purpose of comparison)
S.8420 - 008420 (PIAGGIO)