SOHC.co.uk Forums > CB350/400

Exhaust gaskets too big!

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Sprocket:
I remember digging the ones out of my head, they were difficult to identify initially. Definitely agree with Julie; if it's running without noticeable leaks, leave it. Next time you have to take the exhausts off, have a look with a dental pick.

When I get home I'll measure the depth of the tunnel properly so you can see how far in it goes, perhaps if you compare measurements you could get a better idea of if there's some in there or not. Perhaps a good photo would help? I sometimes take pics with my phone and zoom in, while I'm sat in front of the bloody thing!  :o

Laverda Dave:
Remembering back to my mechanical engineering days the rule of thumb to work to for thread exposure above a nut should equal the bolt diameter. So, if you have a 6mm exhaust stud there should be 6mm of thread protruding from the nut after tightening. This theory applies to all sizes, so a 8mm bolt will have 8mm of thread showing above the nut etc.
I've always had problems with the exhaust gaskets being a bit big, I normally find a socket of the same diameter as the exhaust port and use it to tap them in and stop the gasket deforming.

Athame57:

--- Quote from: Laverda120 on August 21, 2019, 11:19:26 AM ---,,,,I've always had problems with the exhaust gaskets being a bit big, I normally find a socket of the same diameter as the exhaust port and use it to tap them in and stop the gasket deforming.

--- End quote ---
What if you end up with a socket getting stuck in there?  :o

mike the bike:
Use the split collets as a drift to seat the gasket in firmly.  Usually only needs a couple of taps with a hammer.

Laverda Dave:
Good idea Mike. When I use a socket I make sure it's slightly smaller than the exhaust port!

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