I have an FJR which came with the Yamaha topbox fitted. As usual it fell off after 6 months and someone else took it. I bought a new Bestem 46l box and mounting plate from Bestem America for $89 delivered to Australia. Just needed a piece of 6mm aluminium plate and all bolted to the original...
:: on the freeway I will not ride behind a car that is closer than about 12 seconds ahead of me, and no cars on either side,
12 seconds at freeway speed - 60 mph - is about 400 yards. If you did that here you would have 6 or 7 cars fill the gap. I normally leave about 3 seconds - about 100...