bike carb help

[DAN-F]

what are these theyre on the outside just before the butterflys, theyre like a slide type of thing and they make a suckin noise when you open them,
does anyone know what they are

http://i303.photobucket.com/albums/nn152/DAN-F/DSC01294.jpg

its tha black plastic bits with the little cut out piece that i mean

[burgo]

im sure there something to do with keeping the air velocity higher at lower revs to allow a nice smooth throttle delivery

[DAN-F]

so if i put them on a 1.6 8v just as normal they should work ok no extra potching about

[ck]

they are similar in design to an SU carb. that slide will move depending on revs, it also controls the needle so adjusts fueling.

[meritlover]

yes, its a CV carb so that slide will depend on engine vacuum. it helps maintain the air speed across the venturi regardless of throttle input.

should just need fixing to a manifold and jetting.

[Adam]

Its how that type of carb works.
So yes, just fit them to a manifold.

[DAN-F]

thanks