do these intake silencers even exist?

DogBunny

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1974-1975, part #21.
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1976-1977, part #24.
Only shown in diagrams for these 4 years. Never seen in the flesh or photographs.
Just curious, has anyone ever seen one?
 
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Thanks Mailman. This is a left-side 1977 airbox (with the filter door removed), the exact same part that you have the K&N sticker on, part # 10 in the 76-77 diagram. I am convinced that part # 24, the silencer, never existed, at least not on U.S. models. If it did, it would have to be made out of flexible foam, that's the only way that it could be squeezed in through the airbox door, which is too narrow, and put into the big, empty, rear chamber of the box.
 
Yes unlike hens teeth they DO exist, AFAICT were always fitted from the factory. I've only seen a couple, fewer yet that were intact, even up here in the great white north where many bikes hibernate in cool barn basements.
Between how fragile the foam is and "hotrodders" removing them, few survive.
I'm sure in texas they all are dust in the wind.
 
Thanks everyone. I can imagine them getting crusty and turning to dust. Not exactly what you want getting sucked through your carbs.
Maybe that's why they only lasted for four years. The 78-79 air box appears to be identical to 76-77, except they eliminated the silencer and restricted access to the chamber in the airbox that it would have gone into.
 
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View attachment 159982
View attachment 159983
Thanks Mailman. This is a left-side 1977 airbox (with the filter door removed), the exact same part that you have the K&N sticker on, part # 10 in the 76-77 diagram. I am convinced that part # 24, the silencer, never existed, at least not on U.S. models. If it did, it would have to be made out of flexible foam, that's the only way that it could be squeezed in through the airbox door, which is too narrow, and put into the big, empty, rear chamber of the box.
A bit of a hijack but what do you guys use when rebuilding the inner filter Part #10 as in what kind of glue when using the Uni filter material
 
A bit of a hijack but what do you guys use when rebuilding the inner filter Part #10 as in what kind of glue when using the Uni filter material
edit looks like part # 19 or # 10
 
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So far I cut the uni foam to be a bit of a push fit into the frame and wrap it with safety wire. :shrug: gluing the foam filter ends together with weatherstrip adhesive should work also. If the expanded mesh is loose from the ends, then a good caulk gun tube mastic or 2 part bumper cement should reattach them.
 
So far I cut the uni foam to be a bit of a push fit into the frame and wrap it with safety wire. :shrug: gluing the foam filter ends together with weatherstrip adhesive should work also. If the expanded mesh is loose from the ends, then a good caulk gun tube mastic or 2 part bumper cement should reattach them.
Thanks Gary! now to get them indoors to work on them
 
Oops, I thought the metal box with the holes in the end was the silencer you referred to, like some kind of resonance chamber.
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A bit of a hijack but what do you guys use when rebuilding the inner filter Part #10 as in what kind of glue when using the Uni filter material

I did the same as Gary, I cut the foam into strips that was a little wide for a snug fit, and long enough to overlap a bit on the ends, then I used some twist wire around it to hold it in place. These photos don’t show the wire on yet.
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Oops, I thought the metal box with the holes in the end was the silencer you referred to, like some kind of resonance chamber.
View attachment 159992



I did the same as Gary, I cut the foam into strips that was a little wide for a snug fit, and long enough to overlap a bit on the ends, then I used some twist wire around it to hold it in place. These photos don’t show the wire on yet.
View attachment 159993 View attachment 159994
I have this type on the 75 but so the wire wouldn't work but what ever I use to attach the foam shouldn't be affected by gas just the oil on the foam
 

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