Primary gearbox with a 3.72 ratio for the Vespa V50, 50 N/R/L, and PK 50 S-XL.
The primary gear is ideally suited for 75cc tuning.
This primary basket, like the original Piaggio 4.6 primary gear of the XL2, has no shock absorbers. Therefore, this replacement part also fits the Vespa PK 50 XL2 without further modifications.
