Secondary air supply device and motorcycle comprising same

The invention relates to a secondary air supply device in conjunction with an engine including a cylinder body (51) and an exhaust path (54), further comprising a secondary air cleaner (6) for suctioning in secondary air, a secondary air supply path (62) connecting the secondary air cleaner (61) and the exhaust path (54), and a reed valve device (63) for opening and closing the secondary air supply path (62). The invention aims to provide an improved secondary air supply device having a simplified structure. Therefore, the invention provides that a valve chamber (63b) of the reed valve device (63) is formed in the cylinder body (51).