Any link for the kit?For road bike, the lightest weight kit possible. Usuallymena sno more then 2.5 -3 kg total weight.
Also do you know any budget roadbike hydraulic brakes with gear shifters? Because my roadbike disc brake is mechanical and i don't feel safe breaking its has tension but I really have to brake early just to come to a stopRevos Friction drive from Evolutionworks in Bristol.
Or one has to source form China a tiny 1.4 -1.6kg hub motor, a small lightweight bottle type battery and a tube controller, though then the build gets a bit less stealthy with the wiring and display.