How do I change the oil in the front forks of a 1983 Honda Goldwing GL1100? Also where is the drain for it? Where can I access a schematic diagram for this part of the motorbike on the Internet?

You have to take the forks out im afraid. put the bike on a few blocks so you have good height to slide the forks out, take the front wheel off and mudguard. then undo the pinch bolts by the handle bars then twist the forks left and right until they slide downwards and out. then you undo the tops and tip the old oil out. If your going to do all this you may aswell change the fork seals aswell if they havnt been done for a while. Easiest thing to do is get the forks out and then take them to a bike shop and let them do it, saves you loads on labour.
steve