The carb banks have been taken apart before, and by a ham-fisted animal who didn't use a JIS screwdriver.
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It'd do you good to take them out. open them up, and clean the living hell out of everything. You could go so far as to replace all fasteners with allen head bolts, but it isn't necessary.
Yeah I’ve rebuilt the carbs at the top and bottom, but haven’t been able too separate them because the screws are so #$%*in stuck on. Even after soaking in penetrating fluid they wont budge.
Buy yourself an "impact driver":
Works great, even on messed up screw heads. I actually use one on all my carbs, even if a fastener isn't stuck. Mostly because the impact driver bits are closer to JIS (Japanese industrial standard) instead of the NA tapered Phillips screwdrivers. JIS has straight "flutes" on the bits which causes them to "cam" in to the fastener with more applied force, while the NA Phillips has tapered sides and tends to want to "cam" it's way out of a fastener as more force is applied. That's why a Phillips bit very often ruins the screw heads on Jap bikes.
Should be able to pick one up somewhere around 20 bucks.
Once you get those fasteners out, toss 'em and replace with cap head screws and it will never strip again. Harder steel int eh fastener, more of a positive tool engagement when tightening/loosening. Well, they won't strip as long as someone doesn't put the wrong Allen key in it or gets really "ham-fisted" with them that is.....
