The alloy adaptor ring is threaded onto the mouth of the 389 and 689 Amal Monobloc carburetor. The adaptor allows the use of a non-threaded air cleaner.
The adaptor ring is a precision machined aluminum sleeve measuring 1.695″ ID and 1.875″ OD. Replaces part number 82-5958. Made in the UK.
Due to the design of the Amal Monobloc carburetor, with the banjo fitting on the top of the carburetor’s float chamber, the threaded center-mount air cleaner often cannot be used due to interference with the backing plate. In this instance, a recessed non-threaded air cleaner is used and is clamped over the fitted adaptor ring.
The adaptor ring is threaded onto the mouth of the carburetor. A light smear of anti-seize paste is recommended on the threads, as they are prone to galling.
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