FILTER, CENTRAL MOUNT, AMAL 900, DOMED BACK, REPLACEMENT
Part Number 633-900/B
At last, the rare domed central mount filter assembly is back in production, as used on many bikes equipped with the 900 series AMAL Concentric, such as the 1969 BSA Thunderbolt 650.
Alternate numbers: 82-8196, 82-9000, 83-1536.
Also available: domed back plate only, BCS #633-11, to convert the standard flat back filter assemblies into this style.