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Quietest muffler for t150

Posted By: Kara Chaffee

Quietest muffler for t150 - 11/12/18 4:43 pm

Hi All,
What is the quietest stock muffler for a T150V ? I have noise damage in my right ear and even with earplugs, the peashooters on the T150 are a bit much. A part number or physical description would help.

I know that most people get rid of the stock silencers ASAP , and maybe somebody has a crusty pair they want to get rid of???
Cheers ,
Kara
Posted By: Adam M.

Re: Quietest muffler for t150 - 11/12/18 6:13 pm

Stock mufflers used from 73 are quietest.
What about a rest of your problems / questions ?
Posted By: Kara Chaffee

Re: Quietest muffler for t150 - 11/12/18 7:19 pm

Hi Adam,
Thanks for the reply---what do the stock mufflers look like? Are they the ones that have straight sides that increase in diameter all the way to the exit?

I have ordered a Barnett clutch cable to see if the existing cable is squishy and preventing clutch adjustment. I also ordered the T.U. ramp bearing kit, just in case. I really need to get the bike out for some test rides. The rest of my problems are really to do with
being on the spectrum .
Cheers,
Kara
Posted By: Tigernuts

Re: Quietest muffler for t150 - 11/12/18 10:00 pm

You should be able to find pics of the '73 onward silencers in the photos at the front of the manual for that or later years. Same as T140V / TR7RV from '73 on. They are too quiet for my liking, but that's maybe just what you're after!
Posted By: Tridentman

Re: Quietest muffler for t150 - 11/13/18 12:41 am

Kara--no--you are thinking of the "megaphone" type fitted to 71/72.
The quietest are the so called "cigar" mufflers fitted to 73/74.From the front end they expand towards the rear as the megaphone type but about 7" from the rear end they taper back in towards the end.
That is if you want the quietest stock mufflers.
IMHO the best ones are the "rayguns" fitted to 68/69.
With those you really get the triple "wail".
But--certainly also the loudest!
HTH
Posted By: tridentt150v

Re: Quietest muffler for t150 - 11/13/18 4:36 am

Those 'cigar'/Campbell mufflers are quiet. But you don't get anything for free......they also rob you of power. I once bought a set for a triple I was returning to standard and the bike struggled to get to 90mph. Same bike with taper turbo's did 110mph easily [may have had more in it, I didn't try] and the bike was just crisper. Acceleration and response were much better.....but it was louder as well.

I would have liked to do a comparo on fuel efficiency but I got an offer on the bike and sold it. Which was always my intent, I still had my original T150V, the second bike was an investment. A bargain buy, some mechanical issues sorted and then sold.

Norton Commando's also had a 'cigar' muffler fitted to their Interstate models. This was a different muffler to the Triumph version, it had a more pronounced cigar shape.
Posted By: bodine031

Re: Quietest muffler for t150 - 11/13/18 2:21 pm

2 replies from those who know the "Ray-Guns", worked the best and the quiet ones rob power. And the 3-1 headers sound the best wailing Triples!!! I think
Posted By: Adam M.

Re: Quietest muffler for t150 - 11/13/18 3:52 pm

My Trident has 3 in 1 Jardine system and even with my hearing weakening lately getting too loud for me during longer rides..
I'd like to buy "beauty kit" exhaust which I remember from my A65 and like, but it's quite difficult to find.
Posted By: tridentt150v

Re: Quietest muffler for t150 - 11/13/18 10:27 pm

Buy better earplugs :)………….cheaper by far!!!
Posted By: Kara Chaffee

Re: Quietest muffler for t150 - 11/14/18 12:26 am

Hi Everybody,
I know its blasphemy to seek less noise but I must protect my right ear . I will try super plugs for it . The Norton seems to excite the Helmholz resonance of my helmet less and the T150 does more of this . If earplugs can't be found, I will have to get serious about Cigar mufflers.
Does it make a difference who made them?--seems like there are a couple of latter-day reproductions , like Arion-Pacific and Brituro...
Posted By: Steven A

Re: Quietest muffler for t150 - 11/14/18 4:32 am

These are the best.

3M™ E-A-R™ Classic™ Non-Corded Foam Ear Plugs
Posted By: Kara Chaffee

Re: Quietest muffler for t150 - 11/14/18 3:07 pm

Hi Steven,
Thanks for the tip on the 3M plugs. I have ordered some. Might save me from Plaster of Paris ear muffs under my helmet. My left ear does not need a super-plug, but the right is not a happy camper with much noise.
Posted By: Steven A

Re: Quietest muffler for t150 - 11/14/18 9:03 pm

Originally Posted by Kara Chaffee
Hi Steven,
Thanks for the tip on the 3M plugs. I have ordered some. Might save me from Plaster of Paris ear muffs under my helmet. My left ear does not need a super-plug, but the right is not a happy camper with much noise.



The platinum type are a little smaller,

and these are also worth a go.

https://www.ebay.com.au/itm/3M-E-A-R-Push-Ins-Noise-Reduction-Earplugs-28dB-Yellow-Foam-Disposable-PICK-SIZE/192298576192?epid=1600996670&hash=item2cc5e36940:m:m3TmjJwDhx32M6UTtlXLzgg:rk:11:pf:0

Posted By: Steven A

Re: Quietest muffler for t150 - 11/14/18 9:09 pm

And a heavier helmet is quieter.
Posted By: Tigernuts

Re: Quietest muffler for t150 - 11/14/18 10:01 pm

Originally Posted by Kara Chaffee
... the Helmholz resonance of my helmet...

Does it make a difference who made them?...


Evening Kara - I've never heard of this, could you say some more about it please? I'm curious because occasionally, I have experienced a weird sound in my helmet, a bit like Indonesian music if that means anything? Could this be that? (I do have loud exhausts).

Also, I believe manufacturer can make a big difference. Someone else mentioned Campbells silencers. I had a pair on a T140 I bought cheap 30-odd years ago. it was cheap because it wouldn't do more than 80mph. I took the very nicely made and very nicely chromed Campbell silencers off and it went like a rocket - back to better than normal in an instant (normal being with the quiet 'cigar' type silencers).

Those 'cigar' type silencers are also restrictive and knock a good 15% of power off, at a guess based on what the difference feels like. But they are a lot better than Campbells. Should have stuck to making soup.
Posted By: DavidP

Re: Quietest muffler for t150 - 11/16/18 6:59 am

The part # for the cigars is 71-4159. Be advised that earlier pipes are longer because earlier silencers are shorter.
I had the cigars on my '74 when I bought it in '79. It still topped the ton, but it ran better once I switched to pea shooters.
To me the worst thing about the cigars is the lack of ground clearance in corners. They're the first thing to scrape the pavement.
Posted By: Kara Chaffee

Re: Quietest muffler for t150 - 11/16/18 1:58 pm

Hi Tigernuts,
I work in acoustics-- and any enclosed air space has what is called a Helmholz Resonance. The frequency of this resonance is a function of the enclosed volume. Blowing across a coke bottle neck is an example of a Helmholz resonance. It will always hoot at a particular frequency.
So does your helmet, based on its volume. So if you excite the helmet with energy from the exhaust , and particularly if the exhaust note is close to the resonant frequency of your helmet, the helmet retains this energy and vibrates with it. The T150V makes a hum where my 850 Norton makes a rumble. The Norton is further away from the resonant frequency of my helmet and does not excite the helmet as much.
I don't know about Indonesian music--sounds more like wind noise. To me, all Indonesian music sounds like wind noise anyway. The resonant contribution of your helmet would appear as a constant drone.
Cheers,
Kara
Posted By: Tigernuts

Re: Quietest muffler for t150 - 11/17/18 6:27 pm

Interesting stuff re. resonance Kara. The 'Indonesian' description wasn't very helpful if me, I can see! In fact, when I get that strange noise in my helmet it's made u of constantly changing notes over a constant, barely audible drone. Heard any Jon Hassell & Brian Eno? A bit like some of that! Quite pleasant if it wasn't also slightly worrying. Its only done it two or three times and I just wish it would stop after a while.
Posted By: Kara Chaffee

Re: Quietest muffler for t150 - 12/04/18 3:43 pm

My thanks to Steven for the suggestion of 3 M Classic earplugs. My right ear is now a happy camper with the T150V. Spending $12 on a box of earplugs (which reside on my service bench) is far preferred to spending $300 on mufflers! I can happily keep my peashooters which are economically and aesthetically pleasing, and continue to upset the neighborhood dogs as I ride by.

I have noticed that the T150V is more upsetting to the dogs than the Norton. I suspect it is the simple fact that it is a Triumph. The Norton makes the dogs run around, where the Triumph makes the dogs want to bite me.
Sincerely,
Kara
Posted By: Adam M.

Re: Quietest muffler for t150 - 12/04/18 4:23 pm

It's because of a clatter from its engine, nobody can stand it for very long.
What about your starting and carb problems did you solve them ?
Posted By: Kara Chaffee

Re: Quietest muffler for t150 - 12/05/18 1:26 pm

Hi Adam,
I put the carbs back together and a big strong friend of mine who owns a Trident came over and we got it started --it kicked back on him in the first kick like it always does to me. We verified the timing on the Boyer , which was fine. I did not realize how much oil can sling out of the view port!
In any case I went and ordered a Trispark Triple. Time for the Boyer Bransden to Hit-The-Road-Jack. The Boyer that came with my Commando did kickback troubles through the breakout clutch until I got rid of it. I can now start a Boyer Bransden museum shelf.

I got the bike on the road for only a couple of minutes yesterday --not enough to really warm it up and see how the carburetion is doing. I will say the the Stay-Up floats are very good. They set to a perfect height in the bowls without any fiddling. I was able to find kits with floats, needles , float needles and full gaskets for $43 ea.
Since I have the Trispark coming I won't worry about fine tuning the system until its installed. The wasted spark across three coils just does not appeal to my aesthetic sensibilities.
Sincerely,
Kara
Posted By: Adam M.

Re: Quietest muffler for t150 - 12/05/18 8:48 pm

Trispark should make it easy to start, in a case of my bike first kick after solid tickling makes it when a bike is used regularly during weekends.
Just decided to change my exhaust to "beauty kit" exhaust, re spoke and polish a hub of rear wheel and thousand $ is spent smile.
Trident makes easy to spend money smile.
Posted By: tridentt150v

Re: Quietest muffler for t150 - 12/06/18 10:42 pm

Whats that saying..." I have to get to the bank and take my money out for the Trident before my missus gets it and wastes it all on groceries and the light bill"
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