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Cleaning the carburetors

Picture 3 shows a completely disassembled BING carburetor.

Dirty disassembled carburetor
Picture 3: Disassembled BING carburetor

During the first step of the cleaning process, the parts of each carburetor are blasted with glass pearls to remove the majority of the dirt. During this process, the surface is solidified, becoming less porous which makes it less prone to build-up. Following the cleaning process, all fine threads are re-grooved and checked for surface damage. The real cleaning takes place in an ultrasonic bath where a solution especially designed to work with the composition of the alloy is used. Besides the fine threads, the carburetors also contain very small drill holes which require special attention.

It is only during the ultrasonic bath that all the damaging deposits are removed. I use professional industrial equipment for this process which has a holding capacity of 4 to 6 liters.

Professional dis- and reassembly of the parts of such a carburetor requires knowledge, experience and special tools. For example: the screws holding the throttle assembly are not only held in place by nuts, but also sealant. If these screws are removed by force, the spindle will suffer irreversible damage.