Many very fast 50cc Freetech etc use 30mm HV Lectron carbs , the trick here is that this particular carb , like its bigger brothers has a venturi radius behind the slide that is 4mm smaller than the nominal bore.
Thus at 1/2 throttle it operates like a 24 Dia , and if the flow bench tests are the same as the bigger versions , they flow more air at WOT than the equivelant bore sized Keihin/Mik/Dell.
Of interest as well is that the Lectron can be run up around 50* downdraft to straighten out the inlet duct without spewing fuel thru the pilot circuit under brakes , as all other carbs do except the
actual rare carbs designed with an angled bowl.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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