Internal combustion engine

An internal combustion engine comprising:

• a combustion chamber having a first exhaust port and a second exhaust port;
• a camshaft operatively mounted relative to the combustion chamber, said camshaft having a first exhaust cam and a second exhaust cam on an outer circumferential surface thereof, said camshaft being rotatable in ganged relation to rotation of a crankshaft;
• a first exhaust valve for opening and closing the first exhaust port;
• a second exhaust valve for opening and closing the second exhaust port;
• a first rocker arm for actuating said first exhaust valve to open and close, said first rocker arm being actuated by said first exhaust cam;
• a second rocker arm for actuating said second exhaust valve to open and close, said second rocker arm being actuated by said second exhaust cam;
• and
• a decompression mechanism rotatable in unison with said first exhaust cam projecting a decompression operator to lift said first rocker arm in a valve opening direction at a timing of a compression stroke initiated by the internal combustion engine when a rotational speed of said camshaft is lower than a predetermined rotational speed, and retracting said decompression operator when the rotational speed of said camshaft is equal to or higher than the predetermined rotational speed;
• wherein said first rocker arm and said second rocker arm are provided with an angular movement transmitter transmitting a turning force produced by said decompression operator in the valve opening direction from said first rocker arm to said second rocker arm.