Hey all, I have a question about the seat for my 67 a65. The seat I got with the bike is messed up, I think. There are 6 holes in the pan, the two up front are unthreaded and look to accept the rubber bungs. Then a few inches back there are threaded holes that don't line up with any holes on the frame. Then a few inches behind that are 2 holes that look to maybe have been torched out by a previous owner that line up with the tabs on the frame.
I'm thinking that maybe BSA used the same seat pan accross it's line up and the middle set of threaded holes are used on a different bike and the holes that were torched out were possibly threaded at some point also. I have looked at other seats on eBay but who knows if they're the right seat or not, so I'm not sure which holes are for what.
So, for a 67 A65 I would put the rubber pieces on the forward most set of holes, the middle threaded holes go unused, and the rear holes are supposed to be threaded to accept the seat bolts?
If so I'll need to weld a nut onto it, in which case does anyone know the length of the spacer that goes there? I'll just weld a coupler nut there if I can find a suitable length one. My seat is kinda messed up anyways so it'll suffice until I can find a better one.
It's all just as you said, somebody tore out the threads. That spacer is maybe a half inch, no more. Just enough to keep the seat off the fender and to allow room for the chrome rail at back of seat. Seems like I welded something once, I'm sure it melted plenty of foam but you couldn't tell. You could pop rivet some stuff under there.
I took my cover off, put bolts through the holes, made a brace to span across the bolt section to stop further damage to the base and locked it down with a flanged nut on each side. The flange on the nut acts like a spacer and spreads load better. Just so happened to be the right length. I can now put a nut on the stud instead of piddling around trying to line them up.
Earlier frames had the seat mount further forwards than the 67< bikes
Thanks guys, the foam is messed up under there but you don't notice on the top so a little more melted foam is ok. I'll probably weld up a nut to act as the spacer and then I can use a common bolt to attach the seat. One of these days I'll order a cover or a whole seat to use. I did find some measurements online (a thread here actually) that specs the spacer at 17/32 or 7/16 for the repop ones, so 1/2" is right in the middle.
got the seat to go on fully but the rubber bumpers don't touch anything. Is that normal? I assume not. Maybe I have the rubber bumper in the wrong holes? Here's a pic of where I think they go, but now I think they go in the far back holes? It's hard to see them but they're behind the fubared holes towards the outside