I have a 1978 R100/7 and all I want to do is drain the oil out of the front forks and refill.
I have Clymer's manual, and it seems to only describe a complete tear down, not just an oil change.
Is there a way to just drain and refill without a tear-down?
According to that manual, there are 5 different possible forks (probably because it includes a variety of bikes). Mine appears to be the one they call a "Type I."
They have rubber inserts on the bottom that plug into a large nut that is screwed on the bottom end of each fork. Do I just unscrew this large nut, or does the nut and allen socket first need to be removed which are inside that large nut and covered by that rubber insert?
Also, where on the top of the forks does one open and pour in the new fork oil?
If there is some video or an article I would appreciate that as well.