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2-1 Stainless Exhaust finally finished. CL350

MountainGoat

MountainGoat

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Location
Great Smoky Mtns, TN
I built my 2-1 out of stainless 2 years ago as the previous owner had cut down the original exhaust. I finally got around the welding up my headers from the head to the 2-1 merger. Headers are 16 ga 1.5 stainless with a 1” NOM pipe inside with a 30mm ID that is plug welded to retain exhaust velocity. About 4 inches before the merger the pipe opens up to 1.3 inches ( 33mm) and after the merger it is 1.75 OD 16 ga pipe.
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Hours of grinding and sanding in this as I only have a mig welder. Tig welder is on the wish list. 1970 Honda CL350
bc98333e0660b79de25bd903dc0e18e6.jpg



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LongDistanceRider said:
That looks good and the pipe diameters sound right also, nice job.
Curious about the muffler, how quiet/loud would you rate it?
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Moderate I would think. Runs about 92 DB at idle by a phone app. This is Cone Engineering’s Quiet Core muffler, not a straight through.


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92 dB isn't too loud, 80 is the Federal standard for bikes. 88 for tractor trailers. I'm running @102 dB now and with my hearing again it should be lowered so I don't get a head ache, level has zero effect on my ears.
 
Nice job. What did you do for the stops where the headers mate with the exhaust ports in the heads?


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RockReef said:
Nice job. What did you do for the stops where the headers mate with the exhaust ports in the heads?


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I bought some stainless steel 1.5” schedule 80 pipe that has a 1.5” ID 1.9” OD and 2 stainless stainless washers. I had my machinist turn the pipe OD down to 1.8” then he made a 1.8” OD x 1.2” ID washer. We cut the pipe down to 20mm long and I plug welded that to the end of the 1.5 inch pipe. I then welded the washer over the end of the pipe, this is what the copper crush washer crushes against on the pipe. I didn’t take pictures but it works just like the original end.


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That’s a good idea. And you MIG’d this? Looks pretty good for MIG but kinda a pain huh? Assume you got stainless wire, a helium tank and set up back purge just for this?

Is the stainless tubing coneeng sells truly stainless? You can check with a magnet, real stainless is basically aluminum and won’t be magnetic


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RockReef said:
That’s a good idea. And you MIG’d this? Looks pretty good for MIG but kinda a pain huh? Assume you got stainless wire, a helium tank and set up back purge just for this?

Is the stainless tubing coneeng sells truly stainless? You can check with a magnet, real stainless is basically aluminum and won’t be magnetic


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Yes mig’d. Stainless wire and I used Trimix as a shielding gas. No back purge but I used Harris Solar Flux Type B which is a stainless flux you can use on the backside of stainless welds without purging.

The Cone Engineering muffler is real 304 stainless.

All the weld joints were 80 grit flap disc’d followed by belt sanded up to 240 grit.


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MountainGoat said:
Here it is today after it heat colored a bit.



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That’s fantastic, I’m awed at your skills. Beautiful job! Let us know when you start taking orders. [emoji846]


Tom - 1982 CM450E
(“Noob”, but learning fast!)
 
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That is really inspiring. I have my Mig set up to weld stainless but I had no idea that it was capable of producing something as good as you have achieved here. I must practice a lot more.
 
Richard Pitman said:
That is really inspiring. I have my Mig set up to weld stainless but I had no idea that it was capable of producing something as good as you have achieved here. I must practice a lot more.
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My mig beads were pretty straight but finishing with a flap disc on the grinder and a belt sander made the difference. If I got serious about making pipes I would buy a pipe sander.

NEW Bluerock Tools Polishing Machine for Tig Plasma Arc Welds Model 40A Pipe Polisher Sander Grinder https://www.amazon.com/dp/B00NPI39C...abc_KSG9TCNC1AJKZBRSD5GB?_encoding=UTF8&psc=1


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MountainGoat said:
I built my 2-1 out of stainless 2 years ago as the previous owner had cut down the original exhaust. I finally got around the welding up my headers from the head to the 2-1 merger. Headers are 16 ga 1.5 stainless with a 1” NOM pipe inside with a 30mm ID that is plug welded to retain exhaust velocity. About 4 inches before the merger the pipe opens up to 1.3 inches ( 33mm) and after the merger it is 1.75 OD 16 ga pipe.


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Can you elaborate on “1” NOM pipe inside with a 30mm ID that is plug welded”? I know the stock headers are 1.5” OD and 1.1” ID but that’s because they are triple walled off the head.


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How is the performance/flow of the single muffler compared with the OEM dual mufflers ?
I love that Stainless Steel. (y)
 
Following this. What you’ve done looks awesome!

I have a CL175 K6 and as usually the muffler is rotted. Looking into doing something like this.

Curious for an update?


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