I have a 1977 xs650. I'm about to do the front brake. It's a single caliper. I'm new to the bike and from what I've read it's usually found on the on the right side. Mines on the left. Maybe a stupid question but does it matter what side it's on with a single? I'm about to take it off and service it. And want to know. It's currently working but my lever is very stiff so I want to clean and use the master cylinder a kit I bought.