B50T aftermarket exhaust fitment

Here you can talk about all kind of TECH for the B50 B44 B25 And Other BSA unit Singles

Moderator: minetymenace

Post Reply
Giles D.
>10
>10
Posts: 11
Joined: Mon Apr 05, 2021 3:07 am
Location: Cincinnati, Ohio

B50T aftermarket exhaust fitment

Post by Giles D. »

My current mini megaphone is too loud with a really sharp tone
20210405_155111[1].jpg
.

I ordered this silencer/exhaust pipe (F75 and DS264) combo from Feked that is advertised for the B50: Reminds me of the peanut silencer on my '67 441. I always liked the sound. Looks great, doesn't it?
20210505_201733[1].jpg

But the angles of the exhaust pipe and silencer are much too acute to allow it to fit:
20210430_151536[1].jpg
20210430_151547[1].jpg
Has anyone else had any experience with these? Hints/tips/suggestions? I have written to Feked 3 or 4 times; nothing but radio silence.

Thanks!

Giles
User avatar
SteveS
>640
>640
Posts: 657
Joined: Mon Jul 10, 2006 8:28 pm
Location: Nuneaton, Warks. U.K.

Re: B50T aftermarket exhaust fitment

Post by SteveS »

Hi Giles

Nice looking bike :thumb The silencer set up you have selected looks real good

It's a real PITA when aftermarket parts don't fit. I guess they have supplied the wrong silencer (DS264). On their website Feked show the same silencer for 3 different models (B50, C15 and B40) all with the same part number. However within the text it says -
Please specify which model when ordering
If you told them it was for a B50 then they need to resolve the issue, if you didn't tell them they may try and get out of fixing the problem :cry:

I don't see a neat way of getting the parts you have to fit properly so I'd persevere with trying to make contact. We have just had a Bank Holiday (national holiday) in the UK and it could be Feked are catching up with the backlog plus on-line business has gone sky high since lockdown.
Steve Sewell
User avatar
ghislain
>460
>460
Posts: 475
Joined: Tue May 25, 2004 7:12 am
Location: Amiens (North of France)

Re: B50T aftermarket exhaust fitment

Post by ghislain »

Hello Giles , Assuming that your pipe is the one sold by Feked, can you tell me if it's suitable for standard lozenge shaped silencers ?
;-)
65' C15S
67'B40E
71'B50SS
Giles D.
>10
>10
Posts: 11
Joined: Mon Apr 05, 2021 3:07 am
Location: Cincinnati, Ohio

Re: B50T aftermarket exhaust fitment

Post by Giles D. »

Steve: yes, I clearly specified B50T in the order and actually had correspondence about it with them before ordering. I'll give them another day or two to respond before taking the next step. I haven't bought a lot from them in the past but they have seemed reputable and prompt so I'm giving them the benefit of the doubt, especially that I now know there was a holiday.

Yes, Steve, it IS a good looking bike!

Ghislain: this pipe is necked down from 1-1/2" to 1-3/8" to fit the peanut silencer inlet, and the exhaust pipe exit is almost parallel with the wheelbase whereas the original is 1-1/2", shorter, and angled out to the right. This new pipe is a lovely piece of work, it just doesn't mate up with the new silencer!!
eebtr7
>260
>260
Posts: 277
Joined: Fri Dec 21, 2007 3:49 pm
Location: Texas USA

Re: B50T aftermarket exhaust fitment

Post by eebtr7 »

The answer to this burning question was resolved for me by... 1. Get thyself a 441 Victor Special muffler from the late 1960's, mine is from a 1968 model; 2. Get thyself an straight exhaust reducer from the local auto parts store emporium that is 1 1/2" on the inside and 1 3/8" on the outside of the other end. This reducer has an overall length of about 2-3 inches.; 3. Get thyself 2ea decorative clamps to fit along with a mounting brace to support the muffler body to the frame tab.

The muffler will angle outwards a little and will take a few months of looking at to get used to it. I never was able to find an angled metal reducer, even at the plumbing supply houses.

Total cost to me was in Yankee money, $1.87 for the reducer, everything else came out of the accumulated parts pile.
Jeff K
>1400
>1400
Posts: 1466
Joined: Sun Jul 13, 2014 12:30 pm
Location: Bay City, Michigan USA

Re: B50T aftermarket exhaust fitment

Post by Jeff K »

I have been having the same problem for years with replacement mufflers being 1-1/2" and the pipes are 1-3/8". They sell metal reducer sleeves that do not fit or seal and by the time you have gotten them to tightened down, you have damaged something I picked up some bronze bushing of that size that had a rim on Ebay, they are called top hat type. I turn the raise rim down to the OD of the muffler's pipe and the used the band saw to cut one diagonal slot on one side. They fit and seal great and they do not rust.
Jeff
nopdog
>180
>180
Posts: 181
Joined: Mon Nov 21, 2011 5:38 am
Location: BAWLEY POINT NSW AUSTRALIA
Contact:

Re: B50T aftermarket exhaust fitment

Post by nopdog »

Take it to an Exhaust specialist and they will cut and weld and fit. They will probably do all three.
beat
>1400
>1400
Posts: 5953
Joined: Sun Jun 04, 2006 5:33 pm
Location: Switzerland

Re: B50T aftermarket exhaust fitment

Post by beat »

Giles D. wrote: Thu May 06, 2021 1:40 am Hints/tips/suggestions?
isn't the muffler on the feked bike near to the engine and higher up above the swing arm :?:

<201 <201
hhh
>440
>440
Posts: 443
Joined: Fri Aug 27, 2010 10:34 pm
Location: British Columbia

Re: B50T aftermarket exhaust fitment

Post by hhh »

These diameters are sounding awfully small for a B50. 1-3/8" outer? I wouldn't want less than 1-1/2" which is already too small. My 441 sure liked an increase in its exhaust pipe to 1-1/2" from the 1-3/8" stock. I'm running a Dunstall Decibel on a "TR44W" and it works great. I was clocked at 150 km/h down on the tank with a 10 year old build used daily as my ride to work bike.
Jeff K
>1400
>1400
Posts: 1466
Joined: Sun Jul 13, 2014 12:30 pm
Location: Bay City, Michigan USA

Re: B50T aftermarket exhaust fitment

Post by Jeff K »

hhh wrote: Fri May 07, 2021 8:24 pm These diameters are sounding awfully small for a B50. 1-3/8" outer? I wouldn't want less than 1-1/2" which is already too small. My 441 sure liked an increase in its exhaust pipe to 1-1/2" from the 1-3/8" stock. I'm running a Dunstall Decibel on a "TR44W" and it works great. I was clocked at 150 km/h down on the tank with a 10 year old build used daily as my ride to work bike.
Good catch !!, I believe the B25 uses a 1-3/8" pipe and the B50 uses a 1-1/2"
Jeff
BasilF
>140
>140
Posts: 155
Joined: Sun Dec 18, 2011 10:35 am
Location: Countesthorpe, just south of Leicester.

Re: B50T aftermarket exhaust fitment

Post by BasilF »

It looks like that silencer would work with a standard B50 exhaust pipe but how would you mount it as the lower silencer bracket seems to be missing from your frame.
eebtr7
>260
>260
Posts: 277
Joined: Fri Dec 21, 2007 3:49 pm
Location: Texas USA

Re: B50T aftermarket exhaust fitment

Post by eebtr7 »

I do beg your pardon...Are you referring to my suggestion?

If so, 1 3/8" outside diameter is required to fit inside the 1 1/2" outside diameter pipe on the 441 muffler. The pipe reduction is for about a mere two inches.
Giles D.
>10
>10
Posts: 11
Joined: Mon Apr 05, 2021 3:07 am
Location: Cincinnati, Ohio

Re: B50T aftermarket exhaust fitment

Post by Giles D. »

The Feked silencer looks like it might indeed mate to the original exhaust pipe (angle-wise), but it has a 1-3/8" inket. The pipe sold to mate with it is reduced from 1-1/2" to 1-3/8" at the outlet to mate with it.
.
Yes my bike is missing the bracket but that is a straightforward problem to solve.

Feked sales finally replied to me. They said they are overwhelmed at the moment but will pull these out of stock and let me know what's up in terms of fitment.
User avatar
minetymenace
Gerry1
Gerry1
Posts: 7854
Joined: Wed May 26, 2004 1:00 am
Location: On the edge of Salisbury Plain, England
Contact:

Re: B50T aftermarket exhaust fitment

Post by minetymenace »

Giles D. would you update your location in your profile please and let everyone know roughly where you are?
There is no evidence to support the notion that life is serious.
Abyssinian Wire-Haired Tripehounds Gnash.
Giles D.
>10
>10
Posts: 11
Joined: Mon Apr 05, 2021 3:07 am
Location: Cincinnati, Ohio

Re: B50T aftermarket exhaust fitment

Post by Giles D. »

Yes!! Sorry!!
hhh
>440
>440
Posts: 443
Joined: Fri Aug 27, 2010 10:34 pm
Location: British Columbia

Re: B50T aftermarket exhaust fitment

Post by hhh »

eebtr7 wrote: Fri May 07, 2021 10:49 pm I do beg your pardon...Are you referring to my suggestion?

If so, 1 3/8" outside diameter is required to fit inside the 1 1/2" outside diameter pipe on the 441 muffler. The pipe reduction is for about a mere two inches.
Yes that's a 19% reduction, short or not, and these bikes are very sensitive to small exhaust changes. 1-5/8" OD is really a minimum for the B50 to not lose performance; and 1-1/2" OD for the 441.
Post Reply