Here is the correct “long-reach” NGK B6ES spark plug for vintage Vespa Scooters like the Rally and the Super Sport
It will also work on those classic and very collectable Italian-made Lambretta models
30 Day Warranty Description

Here is the correct “long-reach” NGK B6ES spark plug for vintage Vespa Scooters like the Rally and the Super Sport. It will also work on those classic and very collectable Italian-made Lambretta models.
Not all Vespas from back in the day used the same size plugs, so please refer to our Compatibility tab for a correct list of compatible Vespa models. Specifications

Name: NGK B6ES
Thread: 14 mm
Reach: 3/4″ (19 mm)
Heat: 6 (medium) Compatibility

Vintage Vespa GS Series (VS1-5/VSB)
Vintage Vespa GS Series (VS1-5/VSB)
Vintage Vespa P and PX Series (VNX/VLX/VSX/T5)
Vintage Vespa P and PX Series (VNX/VLX/VSX/T5)
Vintage Vespa Rally Series (VSD/VSE)
Vintage Vespa Rally Series (VSD/VSE)
Vintage Vespa Super Sport 180 (VSC)
Vintage Vespa Super Sport 180 (VSC)