Not sure what connecting the reed valves does. Never read a report of a marble breaking in this application either. Keep in mind the term "marbling" does not always refer to using an actual marble, but just something to block the hose.
To me if your going to block off the system so it doesn't work, you might as well just remove it then as its now useless added weight. But that's me...
Did the 800 also suffer from deceleration popping? The "EPA" stuff has nothing to do with the issue BTW.
800 professional website.... good links there... I did most of my stuff based off the 800 guy there.
The two jugs have a nipple on each valve cover which used to go to some kid of vacuum switch, allowed hot gasses from the engine back into the intake from what i recall, hence the 'popping' on decel, any unburned gasses would hit the hot exhaust pipes and pop.
On my bike, yes it was epa crap. Every 800 I know of, mine, my fathers all popped on decel, it is the nature of the beast, but without the epa stuff / after burner, it does not.
With the 'afterburner' removed i no longer have pops.
According to russian wolf there was at least once occurance of somebody using a marble and it did break allowing glass into the reed valves.
If you tie the two reeds together without blocking off it seemed to work ok for me, again i have an 800 not a 750, do not know how much different they are.
I still have all my old epa crap too, in a box in the attic.
Now on decel, it just slows down and never pops.
here is a direct link, again for the 800....
Sorry i do not know the 750, I can only offer links to the 800 stuff...