SOHC.co.uk Forums > CB350/400

silencer

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mattsz:

--- Quote from: AndyD on August 26, 2020, 08:10:19 PM ---Matt,
I looked at opening the tabs but decided this was likely to crease and maybe damage the chrome as hard to do neatly.
It also seemed that the problem is the gasket rather than the silencer so I just ‘peeled’ a bit off the outside of the gasket with a Stanley knife, trying to keep it as even / round as possible.
Messy but seems to have worked OK
Good luck with your one
Cheers
Andy

--- End quote ---

Thanks Andy - I'll check it out!

mattsz:
I checked out my silencer's captive mounting nuts - one is clear, but one binds the bolt as I thread it on by hand.  So perhaps it also has some weld spatter in the threads.  I don't have a tap to clear the threads, but careful threading of the bolt may be enough to clear it.

I emailed DSS here in the USA about the gasket - their reply:


--- Quote ---Sorry for the issue with the gasket received.  Yes this is something we are fully aware of.  If you pull out very slightly the slits in the muffler so the gasket fits in, once this has been done you should now be able to a make a perfect seal.

--- End quote ---

Hmm... they're "aware" of the issue - but their answer appears to be just bend the tabs open and jam everything together.

My recollection of the gasket material that came off the collector tells me that this new gasket is longer than the original - I think I'll gather all my components and lay them out to see how to make it work - it might be difficult to use the old parts for comparison, as I had to basically destroy the old silencer to remove it...

AndyD:
Matt,
Trying to open up the slits sounds easy but I had a brief look at doing this but backed off thinking the risk of cosmetic damage was too high compared to shaving the gasket down.
I'll be interested to see how you get on whichever way - shame they couldn't just get the gasket thickness right in the first place!
Be careful with the weld spatter - one bolt got completely stuck on mine and sheared off so hopefully you can clear the thread OK.
Sad thing is these should be the 'fun' and easy bits - fitting brand new parts!
Cheers,
Andy

mattsz:
Thanks Andy!  I'll definitely report back!

The bolt (P/N 95700-08016) is an 8x16 flange bolt - I assume it's the "regular" 1.25mm thread pitch and not the "fine" 1mm thread pitch?  I wish part number search results would offer thread pitch info and not just diameter and length...

mattsz:
Interesting that the "tabs" on the repro silencer's collector end aren't as long as on the Honda's.

The DSS version, with slots cut in only about 7/8" from the end:




And my old Honda one, with slots almost 1/4" longer:

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