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b175 baffle removal
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pd110961
United Kingdom
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June 26, 2014 - 11:24 am
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i had a few moments spare last night so thought i'd pull out the baffles on the b175.. undid the domed nut and lock nut, pulled off the black painted cone.. then scratched head.  how does the baffle assembly pull out of the silencer?

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Peterg
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June 26, 2014 - 11:36 am
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They don't. Only on the early models do the baffles come out.

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pd110961
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June 26, 2014 - 12:07 pm
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makes it tricky to clean them then!

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Nicko
Geelong, Australia
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June 26, 2014 - 1:09 pm
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Peterg is right, they are not supposed to come out.  I convinced myself that mine needed cleaning when I could not get the bike to run well, so drilled out the 2 spot welds and pulled the baffles out.  I now have a couple of small bolts to hold them in or they will come out like a rocket if the bike backfires.  And no they did not particularly need cleaning so that was a waste of time and effort.

'68 D14/4 Supreme, MK2 Jag, beat up old Mazda 626 that won't die.

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Mags 1
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June 26, 2014 - 9:40 pm
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I'm wondering if different manufacturers made their own silencers slightly differently?

Did BSA actually make their own, or did Burgess make them?

Different books show baffles being pulled out of some models but not others?

Four now on the road and at least several in bits.

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BASIL
Hamstreet,Ashford.
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June 27, 2014 - 2:51 pm
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All the baffles come out of my B175s, but they do tend to be held in by the large copper washer under the cone. Regards Basil.

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cyclobutch
Mid-Essex
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June 27, 2014 - 3:04 pm
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I think on my D10 pipe they all slid off behind the fishtail once you’d undone the main retaining nut.

 

But surely with modern oils the routine two stroke decoke has gone the way of so many rituals from the ‘golden’ days of motoring?

Bikes various, including D10/D14 hybrid - now hard tailed to become a Board Track Bantam - 'The Pie Crust Racer'.

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mike p5xbx
E-Sussex
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June 27, 2014 - 3:46 pm
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All of the factory fitted silencers had removable baffles

the B175 had a similar design to the D7 below but with tubes connecting the disks.
at one time unless you removed the baffles regularly they become completely jammed solid with carbon perhaps thats why some people think they were not removable, but it's not quite as bad with modern oil.
D14 and D7 below.
D7-baff.jpgD14-baff.jpg

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

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BASIL
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June 27, 2014 - 7:36 pm
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Well done Mike!! Regards Basil.

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Chrisw
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July 3, 2014 - 1:20 pm
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I just took mine out and yes they were tight. I also had the whole silencer off and found that other side of the baffles were full of coke with just a small hole down the middle, allowing the gasses to escape. All cleaned out but no difference to the flat performance.

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Stevenod
Oxford to Chipping Norton
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October 14, 2019 - 9:52 pm
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They're supposed to come out with each of the three baffles acting as a bayonet fitting; pull till the first baffle hits the two pips dented into the exhaust outer, twist anticlockwise then pull further. After my baffles fell out and were lost I drilled out the worn pips, replaced with short m6 bolts from inside the can out and fitted the expensive replacement baffles, now less likely to fall out again.

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