If the factory airbox/cleaner is removed and K&N (or similar open element filters) are put on the carbs, can this put some undue strain on the carbs and intake manifolds? Any way to fabricate a little brace up?
I run K&N pods on my Commando, on Keihin FCRs. No brace, and no problems so far.
You can buy braces - e.g., Bellacorse and New Triumph Bonneville sell them for the modern Triumph Bonnevilles with the airboxes removed (a popular mod for that bike). Don't know if they'd work for your bike, but you could check them out. At worst, they'll give you ideas - can't be all that hard to fabricate one.