I did install Harley mufflers on a 1000, no welding to do they just clamped on. I think they came off a sportster, they might sit low enough for the bags. I did like the sound, a low rubble almost like stock.
I wasn't saying to cut off the tip but to grind or cut off the lip at the end of the pipe so he can slide a tube over it and maybe weld it on or glue it.
From the pictures it looks like just the tips. Could you not cut off the flange at the tip and slide a stainless or chrome tube over the pipes. I don't think you can weld anything on there, to much rust.
To bad your so far, I have belts for the 1200 that I have that i'm not using. That is rare for a belt to snap unless in really bad shape or something locked for a second and snap.
Joe, get yourself some new belts, there not that expensive and it will save you a lot of trouble.
https://www.ebay.com/itm/GATES-T070-PRE ... 3495838837
Just make sure that when you adjust the floats, you adjust them with carbs standing on there side. The floats should be just closing lightly and not put there full weight on the needles.
You should leave the rad full or the parts will dry then you might have leaks. I never drain my rads and never had a problem. It gets a lot colder up here then it does in your area.