I scored a good price on a stainless Laser Produro muffler for a R100GS. I took a chance that it would fit a G/S, luckily it does. The only difference is that the muffler has two top mounting tabs. The back front one lines up perfectly, while there is nothing for the rear. I'll make a tab for it.
The muffler had the name brand label riveted on upside down, no big deal, just hit it with a wire brush. probably do something with it latter on.
1st on the agenda for making it fit is to make another muffler guard out of 3/8 metal rod and flat stock. here it is after two short nights of bending and welding. The 1st night the flat stock was bent and drilled the lower mount, then on the second night 3/8" rod was bent, cut and welded to the lower mount.
Stay tuned for more....
BTW- the muffler is more subdued than the Sito, w/ a little more pop from the cylinders at idle. I could drill the baffle holes larger, but am worried about making it too loud and not being able to go back.