Screw engine M7x54 mm

steel
10.9
chrome

Grade AA – first-class repair and as an extremely attractive accessory Product description
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 comparisons):
S.8421 – 008421 (PIAGGIO)