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Hi all I just picked up a used pair of long resonator silencers like ones used on 60s triumphs and bsa’s. The inside looks like there’s an auger style baffle? Runs about 6” long, starts about 6” in from inlet and the auger style discs are tacked in place. Has a straight tube running through the center of the baffle like 3/8” diameter. Any one seen this style? Just wondering. Thanks in advance!
Jamie


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Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

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Yes Allan looking through each end I see that spiral cut disc and the smaller tube in the center. From the outside they look like the normal uk spec longer pre 71 silencers.


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When I bought my '54 A10 in about '76 it had a Gold Star style silencer with a spiral in the parallel section.
It had a really deep tone, maybe due to the spiral giving it a longer effective length?


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Yeah Andy after fitting them they have a quiet deep low sound and not very loud. My stock 72 mufflers are maybe even louder or emit more higher frequency notes. I’m guessing that design is more restrictive then an absorption type straight thru muffler? But I can’t really notice much difference. Thanks for the replies!
Jamie


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Is this the original design for the long Triumph silencers from the 60s or a later thing?

Dave

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Funnily enough a few years back I experimentally fitted an aftermarket spiral baffle silencer to my Suzuki SP370/DR400 single. It sounded great but was was very loud! With such things, the bike/motor, pipe lengths, quality of baffling etc. all must affect the outcome.


na

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