The present invention is directed to providing a device for changing {HEAD ~ the timing} of intake and exhaust valves in {TAIL ~ an internal combustion engine} in which the high production costs for an axial bearing on the camshaft as well as the overall axial length of the camshaft necessary for this axial bearing and for the impulse sending wheel attached to the device can be reduced to a minimum 
The present invention is directed to providing a device for changing { HEAD ~ the timing } of intake and exhaust valves in { TAIL ~ an internal combustion engine } in which the high production costs for an axial bearing on the camshaft as well as the overall axial length of the camshaft necessary for this axial bearing and for the impulse sending wheel attached to the device can be reduced to a minimum
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