Assertion: carburetor's venturi | /r/CapableOf | become active
Facets:
Source sentences:
text: While a very reliable carb/manifold set up, a disadvantage with this carburetor is the fact that the primary venturi accounts for two thirds of the throttle open position (no CFM* figures are given for this position) with the secondary venturi becoming active in the final one third of throttle movement.