HONDA GX100 thick adjuster spring 16561-Z0D-V00 Item description:
Manufacturer - HONDA
Catalog number: 1656 1-Z0D-V00
Application: HONDA GX100 engines
Item no. 4 from the catalog card (second photo)
Dimensions (according to the third picture): L ~ 80 mm, D ~ 6.5 mm, Lk ~ 10 mm
Original spring, brand new.