Originally Posted by
sidecar bob
I've been pondering the flutter thing, & I'm picking it's caused by intake pulses as each cylinder is on the intake stroke, or probably more accurately, the slide dropping during the period of still air in the port on everything except the intake stroke.
The slide is the Venturi effectively, so the smaller the Venturi, the higher the airspeed over the jet tube, so, technically, what I'm probably achieving, is higher airspeed across the jet, rather than greater suction. Or possibly both.
It has never occurred to me to drill the holes out in the bottom of the slides, as all they are is signal ports to the top of the diaphragm, it's not like they have a constant flow of air passing through them, just the displacement of the air moved above the diaphragm. Drilling them out would only have the effect of changing their orientation a bit, although I'm sure dynojet do it for a reason.
I also ponder how adding weight to the slide would work. It would be a constant & have the same effect theoretically. Must try it next time.
Do any of the CV carbs used on bikes have an oil damper such as SU's and Strombergs have? Would it help in this case?
it's not a bad thing till you throw a KLR into the mix.
those cheap ass bitches can do anything with ductape.
(PostalDave on ADVrider)
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