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Author Topic: Sealing the system  (Read 108 times)

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Offline steve

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Sealing the system
« on: June 15, 2020, 09:27:46 am »
Any ideas on how to seal the header to muffler on a 1976 CB750A?  I cannot find the gasket anywhere. 

Thanks in advance for any ideas.

Offline sammon287

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Re: Sealing the system
« Reply #1 on: June 18, 2020, 10:13:05 am »
I just did this on my '76 A by wrapping a whole roll of high temp flue tape around the circumference of the header. It seems like it will work, although I have not run it yet. I'm close to the end of a very slow restoration and covid-19 stalled my progress. The proper graphite gasket is available from Europe for $$, but I really think this will work for $8. I could not find a gasket meant for another model that was the right size.

https://www.amazon.com/3M-High-Temperature-Flue-15-Foot/dp/B00004Z4DS/ref=asc_df_B00004Z4DS/?tag=hyprod-20&linkCode=df0&hvadid=167116234959&hvpos=&hvnetw=g&hvrand=11556441530423727576&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9006780&hvtargid=pla-313874637779&psc=1
1976 CB750A

Offline Alan F.

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Re: Sealing the system
« Reply #2 on: June 18, 2020, 11:07:59 am »
Edit: is flue tape the same product?

I wonder if you could use the type of aluminum sealing tape that's used on clothes dryer vent ducting?

https://www.google.com/search?q=clothes+dryer+vent+tape&oq=clothes+dryer+vent+tape&aqs=chrome..69i57.9487j0j7&client=ms-android-verizon&sourceid=chrome-mobile&ie=UTF-8#scso=_x6vrXu3NGKXJ1QHh5L2IAw69:0

Also search for the high temperature variety which seems to handle temps up to 600F, but of course price reflects that.
Free Fork Swaps and Upgrades info parked at http://sites.google.com/site/alansdocuments/ 

My stalled 750K3 build: http://forums.sohc4.net/index.php?topic=46082.0

Fast moving 750K8 build started 5/17/20
http://forums.sohc4.net/index.php/topic,182592.0.html

Offline sammon287

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Re: Sealing the system
« Reply #3 on: June 18, 2020, 01:52:02 pm »
The kind I linked to is the high temp 600 degree kind and is the same brand (3M) that I used. I took some measurements and it ends up at just the right thickness when the roll is expended.
1976 CB750A

Offline Alan F.

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Re: Sealing the system
« Reply #4 on: June 18, 2020, 02:07:59 pm »
That's a great price too, much lower than the factory bushings would cost.

Could you update this thread after you've been riding a little?
Free Fork Swaps and Upgrades info parked at http://sites.google.com/site/alansdocuments/ 

My stalled 750K3 build: http://forums.sohc4.net/index.php?topic=46082.0

Fast moving 750K8 build started 5/17/20
http://forums.sohc4.net/index.php/topic,182592.0.html

 

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