frame modifications

Gday peeps thought my current xs400 chop build might tickle some of your fancies its a 70s inspired gooseneck frame hardtailed one off just started work on it this week still gotta rebuild and polish the old xs lump but planning on running a 1/2 chain driven pma alternator as the old coil and...

Does anybody know if there is any difference between a 77 and 80 xs 400 frame? I know the bikes were a bit different but I feel like the frame hasn't changed inbetween those years. How often does a bike frame actually change right? I wouldn't be surprised if the sportster frame is the same as...

I picked this up in a trade as an extra. I'm pretty sure it's a 400 frame and the motor is a 400. Several questions: 1. Is the frame to chopped up to be safe? The pics I've seen there is a down bar off the spine. Is it ok to run this way? 2. The slots on the hard tail are 20mm. Do I need to...

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...