Ain't No Yank...

But it is a V8, and is is of rather a large capacity, for a bike engine at least.
Showcased by Holeshot Racing at last month's Extreme Performance Bike Weekend, the engine is essentially a pair of siamesed Hayabusa engines, joined at the hip.
The eight cylinder motors have already been used in a number of other applications (yup, cars) but this is the first time we've seen it in a bike - it's a Funny Bike style chassis, but is yet to ahve the rest of the engine's drive train in place. This particular engine uses two big bored 1400cc Busa top ends, so is of an impressive 2800cc capacity. More details from Holeshot