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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 http://www.natenewz.com/2010/06/13/carburetor-tuning-with-diy-manometer/

In action http://www.youtube.com/watch?v=RxkwZ-NDsVs

More complicated but smaller system: http://www.youtube.com/watch?v=2PiQBr20kM8

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