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D14 silencer
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BantamBaz
Reading Berkshire
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July 18, 2021 - 10:44 am
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Good morning one & all.

Some while ago there was a discussion on cleaning baffles etc. Some comments were passed as to non removable baffles & performance.

Someone made a comment about drilling the fixed baffle, I can't find it in the search.

Could anyone enlighten me please. Thanks.

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Ringting
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July 21, 2021 - 8:36 pm
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Was it this one?  ** Please log in to view **

Found that with google search        bantam forum b175 baffle removal site:www.bsabantamclub.com

Alan.

D1, D14/4, Guzzi LeMans, Guzzi V35, Triumph Trident 900, Maserati 160 t4. Mk1 Mini Traveller, Berkeley T60.

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Stoo63
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July 21, 2021 - 10:39 pm
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Go, Alan!! thumbs-upthumbs-upthumbs-up

 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA;  '76 FS1-E; '91 GTR 1000;  '97 Honda Sky SGX50.

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BantamBaz
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July 22, 2021 - 6:45 am
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Thanks Alan, 

I think I've found most posts but not the one I wanted.

My baffles are brazed in & have an outlet of 2  ½ inch tubes.

I read somewhere of someone with a similar silencer & poor performance who had drilled the end plate to free exhaust flow.

I've drilled mine now but have yet to test it.

Cheers

Barrie

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Sponge
Lancashire (A chip shop somewhere near Preston)
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July 22, 2021 - 7:06 am
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It might have been me. Athough the silencer was pretty clean...I was getting a very hot area on my D7 trail bike silencer about 6 inches from the tail cone. After eliminating all other causes I concluded that it had to be the silencer.  This was causing some very choked performance. So in a fit of frustration I circumcised the silencer by about 9 inches and drilled 2 x 1/2 inch holes into the residual end baffle. I re-fitted the end cone and made good with some engine matt black. This freed off the gas flow nicely. The hot area is in free space about 3 inches behind the tail cone now. but it did make it a bit noisier. Now I can hold my own with the local noisy moped boys !!

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mike p5xbx
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July 22, 2021 - 5:35 pm
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BantamBaz said
My baffles are brazed in & have an outlet of 2  ½ inch tubes.
I read somewhere of someone with a similar silencer & poor performance who had drilled the end plate to free exhaust flow.
I've drilled mine now but have yet to test it.
 

There is likely to be more then one baffle inside the silencer so don’t think it would make much difference making more holes in the last one (which already has two big holes) as its more likely the inner ones are probably clogged up
you can de-coke the silencer with a paint stripper hot air gun but you must wrap the silencer in cloth and keep it soaking wet otherwise the chrome will turn Blue with the heat

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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BantamBaz
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July 22, 2021 - 6:26 pm
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Thanks Mike,

Yes, I realise there is more than the one baffle but any improvement would be good & indicate if I'm going in the right direction.

It seems there is quite a variance in performance from pattern or original units.

The silencer seems to be virtually coke free from looking as far as I can but your tip re lagging with damp cloth is good, thanks.

Barrie 

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cocorico
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July 22, 2021 - 6:34 pm
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BantamBaz said
Thanks Mike... your tip re lagging with damp cloth is good, thanks.

Sure is - wish I'd heard of it a few years back...embarassed

D3-silencer.jpg

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mike p5xbx
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July 22, 2021 - 11:57 pm
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cocorico said
Sure is - wish I'd heard of it a few years back...embarassed

I was thinking of your silencer photo when I was typing that message smile

but one thing I forgot to say in case anyone reads it in future, I gave that method to a guy in my local club but he used a polyester/nylon fabric type sheet to wrap the exhaust which melted on the silencer made an awful mess of it
you must use a natural fabric like cotton and it needs to be be tightly wrapped and must keep it soaking wet with a hose it will steam like mad

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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cocorico
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July 23, 2021 - 7:59 am
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mike p5xbx said
I was thinking of your silencer photo when I was typing that message smile

Fame at last! rofl - I must have posted that picture on many of the similar queries over the years, still embarrasses me somewhat, but it's part of the bike's 'patina' now. laugh

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