To expand a tensile force adjustment width of a cam chain by widening a movable range of a wedge in a chain tensioner device in which one end portion of a tensioner arm slidably kept in contact with an outer face at a loosing side, of a cam chain, is rotatably supported on a crank case, a wedge receiving member opposed to the tensioner arm from a side opposed to the cam chain, is mounted on an engine body, and a wedge disposed between the tensioner arm and the wedge receiving member is slidably mounted on the tensioner arm.
A wedge receiving member 36 is mounted on an engine body 11 in a state that one end portion of its crank case 13 side, is disposed at a crank case 13 side with respect to a connection face 52 of the crank case 13 and a cylinder block 14.
WATANABE SATORU
KAWAKAMI TAKURO
KOYAMA TAKASHI
Kazuaki Niki
Nude Shima Shinji