Bike magazine had a Thirty Years of the GS
supplement at the end of last year, and it contained an interview with one of the senior Motorrad engineers. He reckoned that the air cooled engine could pass all current
emissions standards. That makes me surprised that BMW has a new one coming so soon after the latest update was unveiled.
That said, one of the articles above mentioned a four valve, twin plug head, which could suggest the Wasserboxer is an evolution of the current engine.
If the new engine is narrower than the old one then it could be lighter, as there's less metal involved.
And a new R1200S? That's me sorted.