What about an electric Bucket?

[bogan]

seeing as this bike is currently going at scooter speeds why not ditch the big disks and calipers dseigned to pull up the bike from 200kph, and replace them with smaller lighter disks and a single little scooter caliper

would be a lot of re-engineering, and I'm hoping rebuilding the existing brakes will cut the drag down hugely again.

[speedpro]

Running a higher tyre pressure will help reduce drag as well. This is easily measured on a dyno. Get rid of any excess braking power you don't need. Drag from discs is bad enough to warm the discs without use.