Smithjs35, where in FL are you? Ditch the Cobras! Don't even think of any jet kits or anything else, until you get rid of them! There are many people on here who have complete exhausts for sale, though the size and weight of the shipping is a $$$.
My friend's shop (south FL) can make your VMax have a stock level of performance, or more, if you want to spend the $. But your first order of business is to remove the Cobra 4-into-4's! Chances are that whatever has been done to the carbs to fit the Cobras will not need to be undone to install an OEM system. Of course, going back to entirely-stock carburetor jetting eliminates one (or more) reason(s) for your failure to perform VMax. Of course, in its present state, you don't know any better. Once you return to OEM for the exhaust and jetting, with other systems being within-spec, the level of performance improvement is going to be a
BIG surprise! I've ridden other members' Cobra-equipped bikes, and none of them have come anywhere close-to how an OEM bike rides/performs.
Truth be told, I'd rather have a scabbed-up road-rashed set of OEM megaphones on OEM rusty header pipes, than to have a shiny, perfect-appearance set of Cobra 4/4's! Why? Performance! Did you hear me? Performance! Your Cobras give you probably 10-15%
less horsepower! Why is that? Because the OEM exhaust is well designed for torque at all areas of the rev-band, and high-rpm horsepower with legal sound levels. The Cobra 4/4's offer no scavenging improvements over an OEM system. Time and again, members on here have found that going back to stock restores lost power, improves throttle response, and restores the VBoost function.
An easy task for you: remove a CV carburetor cap, and compare your slide needle to these. The OEM USA market bikes don't have multiple slots for adjusting your needle position height, the Dynojet and Factory Pro kits do. Notice that the Cobra jet kit is not listed in these. There will be one screw for the CV carb cap which is a security screw, there are several ways to remove it. Using a Dremel tool with a cut-off disc to slot the security screw head is one way. Using a set of security bits like this from Harbor Freight is another way. The third, is to use a 10" pair of straight-jaw Vise-Grips to grab the security screw pan-head and to loosen it.
Security Bit Set with Case, 100 Pc. (harborfreight.com) Cost is $10, and is the easiest way to remove those pesky security screws. I like to replace the screws with SS allen cap-head screws, easy to operate, non-rusting, and they look good. Do the same for the float bowl screws when you remove the float bowls.
I'm adding some necessary reading for you. Many of your questions about your bike will be answered here. The service manual should be downloaded, and also printed-out and kept in a 3-ring binder for referral.
(3) New Vmax Owner FAQs....new members please read! | Yamaha Star V-Max VMAX Motorcycle Discussion Forum (vmaxforum.net)
VMX12- Service-Manual.pdf (vmoa.net)
would feed directly into the carbs. 
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