Like NYUK said, but also notice its CASE INDUCTED which is kinda cool I think, and it appears to have the jugs on "backwards" from the typical engine, except for the now dead Cannondale, but it was a 4 stroke, so it doesn't even matter really. Personally I think case inducted, with the exhaust shooting towards the rear rather than a ram horn type of exhaust, would prove to be more efficient. The only problem with the carbs on the case is they are inches from the ground, rocks, sand ect, and if you just turned the jugs around they carbs would be into your radiator.
Just thought I'd elaborate.