BREATHER DEVICE FOR TRANSMISSION CHAMBER OF ENGINE FOR MOTORCYCLE

摘要

PROBLEM TO BE SOLVED: To provide simple structure for preventing oil from blowing into a breather chamber of a crank case. SOLUTION: A breather camber 22 is formed on an upper portion of a crack case 1. A lower end portion of the breather chamber 22 has an opening to a clutch chamber 7 in communication with a transmission chamber while an upper end portion thereof is in communication with the air. The opening is formed so as to overlap a large diameter toothed wheel for input 9a of a clutch 9 in the chamber 7 in a visual field of a side.