Whenever you see the symbols shown below, heed their instructions! Always follow safe operating and maintenance practices. The blow-by gases are led to the breather chamber through the crankcase to the intake manifold. Oil is separated from the gases while passing through the inside of the breather chamber from the crankcase, and then returned to the bottom of the crankcase. The fuel system has been calibrated to provide lean air/fuel mixture characteristics, with a suitable air cleaner and exhaust system. Cbf1000fa manual. A maintenance free injection system provides the most appropriate injection timing and helps maintain a thorough combustion process within the engine which contributes to a reduction of exhaust pollutants entering the atmosphere. To assist you in keeping this record, we have provided space at the end of this manual where an authorized Kawasaki dealer, or someone equally competent, can record the maintenance.