I'm not sure if those holes were meant for mounting mirrors or not. If they were, I don't think it was a very good design.
On my Firebird and M21 both, the little clamp screws that hold the levers on put barely enough pressure on the clamp to hold the lever from moving around. I've had to tighten them almost-stripping tight so that the lever stays put WITHOUT a mirror. WITH a mirror, the weight, road bumps, vibration, and wind pressure moves it all around and it seems to be in the wrong place every time I look.
I've gone back to a handlebar-clamp mirror on the old bike. On the Firebird (and on my newer bikes) I use handlebar-end Napoleons; I just bought a $42 clamp-on from Walridge's (seems very nicely made) to see how it will work. I already know that the $8.95 Emgo and JC Whitney mirrors DON'T work past the first hundred miles or so...as their heads dangle down like ripe sunflowers...
Very few of the pics I have show any mirrors at all, but I have one pic of a B50SS with a mirror mounted in one of those holes. I have never had anything but those clamp on jobs on my bikes. They are kind of clutzy but do work...and I don't think I ever paid more than $15.
Correct me if I'm wrong, but i haven't seen a mirror lised in a BSA parts book yet. They were not put on at the works and were usualy added at the dealer as an accessory. Due to crating they left them off. Asked many times over the years, what are the stock mirrors, there simply weren't any, so to speak.
Mike, I use the Harley Davidson style oval mirrors on the 71 and later british bikes. Emgo and others make these mirrors and they work well. I have some that I get from Mid-Usa that have an anti glare property which works well when being followed by some jackass with his bright lights on. Ed
Greetings All, As Don mentioned you are required to have 2 mirrors for state inspection in NC. On my bikes without the above (some are like a B50 where mirrors are like a screen door in a submarine) I just duct tape a couple of bicycle mirrors to my bars on inspection day and promptly remove them after I get the sticker. Bikes in NC that are 35 years old or older no longer need the inspection so you just need to dodge the law for another year! Good luck, JF
Thanks all. I like a left side mirror even with it's inherent vibration. It gets harder and harder to turn my head far enough to see as I age especially with a full face helmet or goggles over my glasses.
I agree with you Mike. It's a little scary riding with no mirrors. I had to put an after market mirror on my '70 B44 and my brother had to do the same for his '71 B50 when we bought them new. Mine was one with a short stem that mounted below the bar so it wasn't in the way for trail riding. Unfortunately, the stem seems to have shrunk in the ensuing 35 years because I can't see anything but my own midsection in that mirror now. I have Harley-type mirrors mounted in the lever perches on my '71 T120R and they work fine.
Three friends of mine had b50's that they bought new in the seventy's, and I had a secondhand b50T that I converted for road use. It was standard practice to mount your mirror/mirrors in the holes in the brake and clutch levers. An open face helmet is also a good idea cos it allows you to move your head around more and gives you heaps more vision than full face helmets do. I usually checked behind me every few miles to check on who was there, by turning my head. I road to Adelaide a few times on my B50. A trip of 800 kilometres each way. I got pulled up by the police once on my way home, they wanted to know what I was looking at all the time!!