I seem to recall that back in my youth, when we used to fit 350LC engines to Gamma's, some folk replaced the rear wheel with early GSXR400 wheels, but can't seem to find any examples online..
Mazda MX-5. 300KW power. Soliton 1 controller, 11" Kostov motor, 20KW/H Turnigy Lipo for 60-100 miles range. 120mph top speed.
Hudson Kindred Spirit 3 wheeler. Twin Agni setup, 300KG 80KW. 100mph top speed (maybe more, but no-one has the guts to try!)
Aprilia RS125, Agni motor, 600A 96v Kelly controller, 6kw/h Turnigy pack. www.Jozztek.com