Bucking is actually lean drop. Air moves faster than liquid, so it takes a second for fuel from the bowl to respond to throttle plates opening. That's the purpose of the accelerator pump -- to squirt a little fuel directly into the throttle bores until it catches up through the venturis.
I've got to run an errand -- we'll deal with your turn signals after I get back (until then just give hand signals through that ridiculously small side window).
Bill Robertson
#5939