The electric motor is so powerful it can pull the bike and rider along at 20kph. Wow. Ground breaking. Even more weight and lots of it unsprung on the front wheel. That will work wonders for handling on the bumpy minor roads that are perfect for a GS.
As for the Morebikes writer perhaps "forward, reverse or neutral" would be more accurate than the stated "The system is activated by the switch (on, off or neutral)".
A turbo electric generator makes sense. Works a a motor for a second or two to keep the rotor spinning & stop turbo lag. When engine is pulling the turbo charges hybrid battery.
Yamaha had a2 wheel drive system on an XT many years ago and if I'm not mistaken a similarly equipped R1, both reviewed well.
We were all sceptical about 4 wheel drive on cars before we tried them.
It seems to be a Wunderlich thing...7,6 Kw electro power (no torque mentioned), is about 10,3 Bhp extra at the front wheel,...could be necessary to pull along all that extra weight...
And all you can see of the system are a couple of wires that feed into the front wheel hub plus a couple of controls mounted to the top of the petrol tank cover.
....oh and the fucking great lunchbox thing sat under the beak, complete with a 20p electrical gland that they couldn't even be bothered to order in black rather than grey
Now if they'd used a bank of capacitors rather than a standard battery, it might have actually been impressive