Derek, I hardly get time to eat and sleep now days, so checking post comes few and far between. A lot is happening - I finished the Bomber, currently in the middle of restoring my 1970 H1, just sold one of my H2's and am buying a Z1 - oh and I am working 12-14 hours a day so the groceries keep coming.
To your question - I really like the stock gearing for street riding. Any shorter and I'd lose the advantage these bikes have in from 4-9,500 rpm. Any taller and I'd lose the great roll-on that these make in the same 4,000 ~ 9,500 range. At 60 I'm pulling approx 4,000 rpm and I would neither want that higher or lower. Assuming your engine is similar, a cruise at 60/4000 is effortless and if you decide to pass it's just a turn of the throttle. If you decide to do it in a limited spot - 1 or 2 downshifts brings on a monster that eats up asphalt real quick and you're back in your lane and the fella in the car just passed knows that it wasn't his daddy's Honda....
I prefer the endless chains and I try to buy the highest tensile chain I can - they don't seem to wear nearly as much and I'm not worring about breaking one made for a Busa. I found one at Chapparal with 11,000 lbs tensile where normal chains have 6,500. I did have a little clearance issue with my gold o-ring chain, but a stainless washer between the gaurd and the frame tab gave me the stand-off I needed for the gaurd. A 10" flat file removed the slightest amount of the case where the chain entered/exited the sprocket. There are some vertical ribs there that my chain's pins hit while rolling.
Gordon