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this is BS! it's a 20 BS. this is the edition of PHBG carbs that mount with hose clamps and rubber hose to the intake. this style of mounting can reduce vibrations to the carb and be a little tighter and less prone to air leaks than a clamp style carb that doesn't quite match up. these carbs have three jets, cable choke, air mixture screw, and endless tuning opportunities thanks to a wide variety of needles, throttle slides, jets, etc. they solve many of the problems had with old inefficient carbs on motobecane, peugeot, puch, minarelli, sachs, garelli... also available in clamp style, black race edition, and other sizes. all the jets are available as well.
note: if your carb includes black drain hose tentacles, do not be alarmed!
20mm - spigot style - pull choke
the dellorto 20mm BS carburetors generally* come with this set up so you can plan your tuning (generally = the jets may or may not be exactly the same - the atomizer will be the same for sure)
atomizer = 262 AU
main jet = 90
idle jet = 50
starter jet = 60
slide = 40
needle = W7
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