 The single in-block camshaft was driven by a gear train on the original 24 HP, and by a more silent chain on its evolution, the 20-30 HP.The driveline comprised a dry multi-plate clutch, a four-speed gearbox and a one-piece propeller shaft, spinning inside a tube attached to the rear differential housing.At its open end, towards the gearbox, this tube forked out into two ends which, linked to the chassis, located the rear axle.