That whole back end does look very familiar to a M3W owner. ABS and/or traction control looking at the rear wheel sensor? A wider axle with a Continental made drive belt rather than the Gates. The bevel box looks externally the same although must have some better internals than the Quaife noise box, interchangeable maybe? An alloy single side swing arm would have been so much better although more costly I expect. Nice close fitting mudguard as standard?
From an engineering point of view Ian I think a single sided swing arm would work best with bevel box on the wheel, less so with belt drive.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone