Patent ID: 8919321

Claim:
An internal combustion engine comprising: a crankcase supporting a crankshaft for relative rotation on a crankshaft axis, the crankcase including: a first portion including a first main bearing to rotatably support the crankshaft, and a second portion including a second main bearing to rotatably support the crankshaft, the second portion being coupled to the first portion so as to define a sump; first and second banks of cylinders extending between the crankcase and respective first and second cylinder heads; a lubrication system supplying oil to the crankshaft and to the first and second cylinder heads, the lubrication system including: a pump including a housing and a rotor, the housing being fixed to one of the first and second portions of the crankcase; a plurality of oil supply passages extending through the crankcase, at least one of the plurality of oil supply passages being in the crankcase; and wherein the second portion further includes a plurality of camshaft apertures consisting of: a first camshaft aperture through which a first camshaft is adapted to pass; a second camshaft aperture through which a second camshaft is adapted to pass; and a third camshaft aperture through which a third camshaft is adapted to pass.