A Carburator. B exhaust. C cylinder. E ignition distributor. G-OFF pedal. H Frictionsconus for the gradual involvement with his sprocket. I on a sleeve mounted sprocket for the speed change. K Disc of the differential. L of the differential housing. N differential brake pedal. P silencer. Q sprockets. R reservoir and water cooling pipe. S exhaust valve. T angle for the speed change lever. U handle the speed change. V flywheel of the engine. X supports the bearings of the differential. Y is the engine brake wheels. Z cross-bar of the wheel brakes.