C
I asked tony Jenkins about that. He said the 850 weight includes everything to make it run as far as electronics and all that goes. But I doubt that's 14 lbs more unless that includes the oil and fuel pumps?
Not sure why its heavier.. Maybe the extra injectors? Lol no idea, just going off what the site said. https://www.rotax.com/en/products/rotax-powertrains.html?page=2