Silent drive chain system for motorcycle rear drive and motorcycle

A silent drive chain system for a motorcycle rear drive, comprising a small chain wheel, a large chain wheel and a silent drive chain in drive connection between the small chain wheel and the large chain wheel, wherein the small chain wheel is detachably and fixedly connected to an output shaft of a motor or an engine of a motorcycle, the large chain wheel is detachably and fixedly connected to a rear axle of the motorcycle, and the silent drive chain is a toothed chain and comprises:

• an outer chain plate, inner chain plates, a guide plate, a pin, a sleeve and a damping sealing ring;
• the sleeve is in interference fit with mounting holes of both the inner chain plate and the guide plate and forms an inner chain link together with the inner chain plate and the guide plate, the pin penetrates into the sleeve and is in clearance fit with the sleeve, two ends of the pin are in interference fit with a mounting hole of the outer chain plate and form an outer chain link together with the outer chain plate, and the damping sealing ring is arranged between the outer chain link and the inner chain link;
• wherein the silent drive chain system further comprises a chain support, and the chain support comprises an inverted U-shaped bracket and a supporting part connected between openings at the bottom of the bracket;
• wherein the supporting part is made of PA46 or PA66 material.