Lambretta/Vespa spark plug cross-reference chart

The following are NGK sparkplugs and equivalents.

Hot plugs are good for rich mixtures such as short city driving. Cool plugs are good for steady highway driving.


Classic Vespa up to 150cc:

Short reach 1/2 inch (12.7mm).

Hot Medium Cool
A.C.-Delco C43F C42F C41F
Beru 14-7AU 14-5AU 14Z-4AU
BOSCH W7A W5A W3A
BRISK N15S N14S N12S
Champion L86C L82C L78C
MOTORCRAFT AE3C AE2C AE1C
NGK B6HS B7HS B8HS

Lambretta or classic Vespa 160/180/200cc:

Long reach 3/4 inch (19mm).

Hot Medium Cool
A.C.-Delco C45XL/N C44XL/N C43XL/N
Beru 14-7CU 14-7CU 14Z-3U
BOSCH W7C W5C W4C
BRISK L15S L14S L12S
Champion N5C N4C N3C
MOTORCRAFT AG3C AG2C AG1C
NGK B6ES B7ES B8ES

Some equivalents came directly from manufacturers, other were found elsewhere, so check first.

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