I recently modded my stock exhaust on my vfr800! Check out this video as it shows how i did it! Let me know if you have any questions!
This exhaust mod is may about 2/3 to 3/4 as loud as removing the exhaust entirely, just to put it in perspective. And I'm thinking about modifying the baffles I removed so I could reinstall them and bring it down to about 1/2 as loud as removing the whole exhaust. When you remove the baffles, you'll see that they consist of a mesh-fiberglass-mesh shell and inside that are 3 chambers with pipes going every which way. I'm going to try and remove these chambers from the baffles so I'm left only with the mesh and fiberglass shell. After which, I'll reinsert it into the cans which should bring the volume down even more. The way the exhaust is now ins't "too loud", but its right on that borderline... haha and if it wasn't for my neighbors I probably would just leave it the way it is! But all that being said I'll be pretty busy for a while so idk when I'll get around to doing that baffle modification, but I'll post in here when I do tho!
