Stupid question here. Last fall I bought an '84 Interstate; put it in the garage and now that spring has arrived I want to change the oil. For years I've had an '83 CB1000 and it was obvious where the drain plug was. Not so on the Interstate. I've been to the library to check it out in a manual but someone borrowed it and didn't return it. Where the heck is the drain plug for this '84 Interstate!!!!