A cam holder 31, constructed separately from a cylinder head 10, for supporting an intake and exhaust camshaft 26 is mounted on a middle deck of the cylinder head 10. At end pivots 27 of each swing arm 25 located at both the right and left ends when viewed...

An engine has a first camshaft having a power input portion at one end thereof and a second camshaft interlocked and connected with the first camshaft at one end portion thereof have axes which are parallel with each other and are rotatably supported on a ...

An internal combustion engine includes a fuel injection valve (6) which is inserted into an insertion hole (8) in a cylinder head (2) in which intake ports (41,42) having intake valve openings (41a,42a), respectively, and an exhaust port (5) having exhaust...