Internal combustion engine with lubrication system

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.