Please forward this error screen to 199. All AMAL chromium types of carburetor pdf components were stated to be finished in “Nickel Chromium Plating, British Standard Approved.
002 clutch were taken-over by BSA and marketed under their ‘Motoplas’ accessories branding from 1967, with Doherty taking-over production of the traditional chromed-steel levers. With the decline of the British motorcycle industry, the use of Amal carburettors declined, but they are still produced under different ownership as spares for the classic market. Amal historically had three popular carburettor designs: ‘Standard’ fitted up to 1955, ‘Monobloc’ fitted from 1955 and ‘Concentric’ fitted from 1967. 76 carburettor uses unfiltered air. The 76 types are of die-cast zinc construction and were introduced in the early 1930s, replacing the earlier 6 series, which were of bronze construction, although basically the same design. The 276 type was introduced in 1940 in an attempt to improve the carburettor’s durability in dusty and dirty operating environments.
In the same design range were the 4 and 5 types with smaller bore sizes and the 29 type with larger bore sizes. These were replaced with the 74, 75 and 89 and then, later, by the 274, 275 and 289 types. 1967 Model Year, was initially designated 600 and 900. The 600 series had bore sizes of 22mm, 24mm and 26mm, being known as 622, 624, and 626 respectively.
Similarly, the 900 series with bore sizes of 28mm, 30mm and 32mm, were known as 928, 930, and 932 respectively. The largest bore at 32mm was slightly larger than any previous Monobloc, and all were flange-fitting with stud-holes at two-inch centres. The Concentric design with non-protruding float chamber was both slimmer and shorter, enabling easier mounting to two-port cylinder heads. Left or right sided carburettors could be produced from basically the same die-casting, and the design was compatible with up to 40 degrees of downdraught. Eventually three variants were produced: Mk1, Mk1.