muffler

Hello, I am looking for a muffler 1972 Norton Commando, but a more quieter model that they see photo
have your a idea
thank you

I think Andover Norton or Armours sell mutes that fit into the ends of those silencers. They were supplied as O.E. by Norton back when the bikes were new.

Martyn.

I bought a set of AN peashooters for my Mk2 850 with no crossover pipe. They are loud. Although you can pussyfoot through town, once you wack it hard to pass someone you will probably break their windscreen with the sound. I put in mutes also from AN and they take a small, and I repeat SMALL, amount of the bite out of the exhaust.
Not too long ago Joe (AN owner) said here he was looking into a quieter silencer. It is hard to believe how much quieter modern bikes are compared to our old shoes.
The Harley-istas bang on about "loud pipes save lives" but they dont make any friends and probably won't save you
from a summons.

You can fit the "black caps" that were OE on Mk2a and Mk3 models. I they are available and would be happy to get you a set.

But.

You'll lose a good deal of performance, and if your '72 is a Combat model, which is likely, where the performance come in a high RPM the "black caps" could wipe out the benefit of your cam and carbs.

I have not seen aftermarket silencers that make any claim to being tame, perhaps AN now has a solution? I also have a '72 Combat model with straight through silencers; I wear ear protection inside my helmet and 'am mindful of my throttle settings when motoring through populated areas.

Testers of the day called the black caps "whisper quiet" though that may have been an exaggeration.
It is no exaggeration to say that they seriously stifled the performance of the Commando engine and gave the MK3 a reputation for sluggish acceleration. Of course the power fix for the MK2A/MK3 is pretty easy, change the mufflers to free flowing type.
Seems you can't have Max power and quiet running. Even today's superbikes wake up with addition of a rorty exhaust and appropriate tune.


Glen

It wasn't an exaggeration, the original black caps were extremely quiet, the engines made more noise !
I have a set of "straight through" black caps on one of my bikes, liberates a bit more noise but still acceptable to most people I would have thought. This bike is my long distance machine and I must admit I don't want to wake up the dead on long journeys, must be an age thing :shock:
sam

My other Commando however, announces it's presence well before it is seen.

Alright Mates,
I don't know the answer to the original question, but y'all tweeked my patience with the stuff about balck caps. I have a MK3 with black caps and it is anything but "sluggish" . Admittedly, they are not originals (the originals died before I acquired the bike). They are probably Armourers. the noise level is reasonable and I don't think they have any negative effect on performance. I can pull the front wheel off the ground in second. The only reason I can't keep it in the air through third is perhaps my balls aren't that big (or foolish) enough anymore. Or, maybe I should say that at 62, I've learned I like them right where they are and not spread out on the street.

The bike was never made to and never will sound like a BMW. If the bike is really that loud, I would suggest that either the baffles are shot or perhaps you have a set of aftermarkets that didn't copy the original design or substituted fiber-glass for mechanical baffles which has now been mostly ejected. Buy a good quality set of stock mufflers and ride with pride.
Just my 2 cents worth,
Cheers,
Cameron