I would first chuck the seat in the fire, then once you are all warmed up, swap the forks to regular height, lose the fork brace somewhere behind your workbench, it may be worth something in.....a thousand years...
Stock or better yet, straight drag bars. AIR FILTERS PLEASE. Also would get rid of that exhaust so you don't blow your ears out.
Which brings me to what may be a wholly unpopular opinion.....I think the only pipes that look right on a Honda CB750 are the STOCK ONES. Yes, this is coming from someone that has stock pipes on his rider, and another good used set for the project i am building.
I think that going to 4-1 pipes simply ruins the styling, to say nothing about the hideous 4-2 aftermarket setups.
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