I have a 1976 honda 750 f ,I bought it from a guy who had it in storage for 15 years. my problem is changing the oil,I drained the oil ,changed the filter but when I tryed to put oil back in ,it wont go into the motor it stays in the oil reservoir that only holds about 1 1/2 qts but from may understanding(little) it should hold 3.7 qts what do I need to do ? Please help me if you can Thank You Brad