swingarm

Have been rebuilding 1981 xs400 that was gifted to me torn apart. Is it important that this lock washer is same part #, or do I not need to grab one for off EBay

So my build is finally coming along well. I'm ready to do fun stuff though, and I think I wanna extend my swing arm a bit. I was wondering if anyone has any suggestions on an extended swing arm that may match up to the frame, or is it best to just custom fabricate? If I could find a nice fat...

I had an hour to kill so thought I'd just have a play and swap some parts over from my beta alp to my xs400, it's unlikely I'll go down this route though as I don't think my abilities are quite up to the build, despite liking the way it looks. It doesn't help that the price of alp parts it's...

Will any other XS400 or XS650 swingarm bolts fit the '82/83 Maxim/Seca? I'd love to use one with the zert fitting on the side. Anyways, it looks like mine is stuck and will need to be drilled out/cut off so I'm just seeing what's out there that will work...

So I'm sitting in the garage thinking about mounting the fender up and I can't decided if I like it or not. So... Also how important is the bar that goes from the front of the swingarm to the swingarm hub?

Sorry if this question has been asked before, I wasn't able to find to doing a search. What other stock swingarm can I install to gain a little length? Example on the cb450 in rebuilt I used a cb360 swingarm which was also 1" longer then the 450. Sorry to use a Honda as an example. Yamaha man...