Aloha from the Big Island ! I hope everyone is enjoying this 80 degree Christmas weather ! ;-)

I need some help please.
I had a guy beg me to buy my bike, which I’d had for at least 10 years at that point.......he was dying of cancer and wanted to do a light restoration on the bike......it was pretty dang cherry, so “light restoration” is putting it mildly.
Sadly he passed away and I ended up lucking out and buying the bike back from his widow.

He basically just cleaned stuff up....but he did this one major faux pas, he screwed with the exhaust pipe.

I’m not sure if he took the pipe apart and removed the baffling inside? Did he send it to those guys doing the “sleeper pipes”? I don’t know, I do know it’s painted the wrong color and the muffler end is totally whacked out. He filled the two mounting bracket holes and welded another bracket on to it.

Anyhew, what I need to figure out is:
A. Has anyone seen this before?
B. Did the guy post here on the site? Not many of us from Hawaii I’d imagine. I’d love to read his posts.
C. The pipe is very loud and “poppy” on decel and light load steady throttle... (bike runs like a champ overall). Is the muffler from a different year or model? It’s missing the sealing Oring, so I imagine that will help with the noise.
D. Check out the welds on the pipe seam....ghetto at best. Is that from the “sleeper pipe” guys?

Mahalo for your help and Mele Kalikimaka.

Sleeper pipe would normally have a metal tag welded to it ... or maybe just stamped someplace... SP XXX where the x's represent the sequential number of the sleeper pipe.

Bike looks very nice & i'm comparing internet images of how the tail muffler mounts but maybe he just wanted to do it different. Or he lost the original mount bracket. I see it still has the spark arrestor down in there so should be reasonably quiet if sealed at the cylinder & where the tail pipe plugs in to the chamber. Is it resonating through the chamber walls like the internal packing has gone or any internal baffle plates have come adrift. Can you pin it down to an area if if it 'is' that sort of problem. There's probably room to build a perforated tube muffler to fit in the tail bit right down close to the spark arrester so you get a quite long packed perforated tube capped to stop ir escaping in there & capped at the outlet with the original en d bit--just the very end minus the short tube. I dunno, just thinking what i should have done to mine years ago but think i knocked the arrester out--knocked it off the welds then got it out somehow & hell it was loud. Lucky i didn't get arrested intead of the sparks lol. That was back about 1990. Still miss that bike. Was a reposession at work with seized piston so probably got it cheap.

Makotosun should be able to look him up if you PM him the friend's real name and/or email address.

Thanks for the input .

I got the original mount back with the bike, and the exhaust was cherry when I sold him the bike. Who knows..... anyway, I’m thinking much of the noise is coming from the missing oring at the muffler junction.

No tag to be seen.

It’s certainly not a life or death deal, but I like my bikes quiet. Keeping this quieter will save me from buying a.....gasp....4-STROKE!

Apparently, I’m old......ugh.

Does the picture of the packing make sense ?
Blender looking turbin thing in the pipe...packing comes out with tip...

Thanks again.

Funny what works when in theory it shouldn't. On my earlier model 360 on the road I used an underneath right side pipe off an RD350LC or RZ350, can't remember which. Had to modify the front bend a bit. Bolted up solid so no leaks. Extra thick skin header & solid chamber right through. Quite as a mouse & performed better than original. In theory was off a 175 cylinder. Actually on mine i think i cut the footrest bar going across to tuck the pipe up closer. Wish i'd taken pics but was about 30 years ago.

Huh?

Hi Thekelzer, That does not look like anything that Dave and I ever worked on. Any pipe that we do will have an "SP" number tag brazed to it (as Mark T mentioned).

DVM.....do have any excellent condition muffler/silencers....not the chamber, but the silencer?

P.s. glad to hear those weren’t your welds....