The model seems quite similar to the TDM to my mind so I would not be too surprised if they used that engine tuned to create a little bit more torque than it currently does. Having had it as a loan bike it pulls pretty well and has better balance than the Tenere. Maybe if they lengthhened the stroke, increasing capacity and torque, they might get nearer a 1000cc version perhaps. That would be easier than developing a new engine entirely.