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I would like to adjust four-body carbs by myself, in order to avoid spent money every time. What are the basic rules, tools and secrets of many body carbs regulation?

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You will need about 25 feet of clear vinyl aquarium air hose and a screwdriver.

Cut the aquarium hose in half to make two lengths. Use each to make a water manometer to balance each pair of carbs (left pair and right pair). Then balance the inner pair and the outer pair using the same method.

The basic idea

In action

More complicated but smaller system:

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