Mechanical slide carbs need a rich mixture or an accelerator pump for rapid changes in throttle position.
When you snap open the carb slides, the vacuum in the carb throats rises toward atmospheric pressure. The vacuum is what draws fuel through the fuel jets.
The venturi's pressure drop at higher air velocities provide this vacuum effect. But, at low RPMs the vacuum is maintained by the near closed slides AND the restriction provided by the intake filter.
Your low restriction pod filters don't flow any more at idle than the stock filter. The engine mechanical efficiency determines that.
But, it does effect the depth of vacuum at idle and thus the amount of fuel drawn through the jets. Pod filters will lean the idle mixture, producing a wheeze effect when opening the throttle slides too rapidly.
If you want to snap open the throttle using this type of carb you will have to richen up the fuel flow.
Choices,
- Put the stock filter back on, or...
- close off the air screws (turn yours in) to richen the idle position mixture. (Effects are limited.) and, or...
- raise the float level in the carb bowl to make it easier for gas to reach the carb throat. and/or...
- increase the size of the slow jet, raise the slide needles, and increase main jet size.
Of course, fuel economy will likely worsen with richer mixtures, if that's any concern.
Cheers,
P.S.
Buddy's 1100 might have CV carbs AND an accelerator pump (or fuel injection?). These differences insulate engine needs from rider throttle position changes.
