From EBR:

We call the 1190 engine an “ET-V2,” which stands for, “East Troy V-Twin.” It is not a Rotax. EBR purchased the rights for the 1125R engine from Rotax and the engine has been significantly developed beyond the original design. EBR’s proprietary Controlled Swirl Induction (CSI) is an example of a major change that produces major results. Beyond that, pistons, rods, cylinder heads, cams,
cooling system ,virtually everything has been changed from the 1125 design. Components are sourced from around the world, but the engine, like all EBR motorcycles, is completely assembled at EBR’s manufacturing facility in East Troy, Wisconsin. Rotax does not make a single part in the engine.