Crank-link mechanism suitable for motorcycle engine

The utility model discloses a crank-link mechanism suitable for a motorcycle engine. The crank-link mechanism suitable for the motorcycle engine comprises a left crank (1), a right crank (2), a crank pin (3) and a link (4), the end portion of the left crank (1) is provided with threads used for installing a bolt or a nut so as to lock an engine rotor to a first taper section (L1), a link lubricating oil path (A) is formed in the right crank (2), a second taper section (L2) used for connecting an air conditioner belt wheel is arranged on the shaft portion of the right crank (2), the end portion of the right crank (2) is provided with threads used for installing a bolt or a nut so as to lock the air conditioner belt wheel to the second taper section (L2), and an oil inlet of the link lubricating oil path (A) is formed in the lateral wall of the shaft portion of the right crank (2) and is located in the second taper section (L2). The air conditioner belt wheel can be connected to the right crank and be driven to