1. The drum is of a radial collapse drum mechanism, which can collapse and expand the drum in working state, with accurate positioning, free of noise, ensured that the drum segments would not collapse, increased the service life of the building drum of the motorcycle tyre building machine; 2. The turn-up and turn-down bladder are used for the turn-up and turn-down process of the band and beads. The bead rings are manually placed over a pair of bead setter rings, which automatically set and assembled. The bead setter rings can be individually changed; 3. The ply servicer includes a total four-tier servicing system for 2plies of body plies, one ply of inner liner and one sidewall; 4. The rear stitcher unit was driven by the cylinder and pressured flexibly by the air spring, The bottom roll stitcher unit was driven by the ball screw through the AC motor and pressured by the cylinder force the stitcher, and it has the function of switch the pressure from high to lower ......