Peashooter DB killer (baffle)

S

Snakepit

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Jun 19, 2011
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Has anyone come up with something to tone down aftermarket peashooters. Just bought a set for my 71 Commando. A little loud for my liking.
 
Different manufacturers produce peashooters that vary in loudness. It would be useful to know who made yours. I have never heard of a db killer for Commando peashooters. You might be able to pack it with some fiberglass. Keeping it in place could be a challenge. Not sure how this would affect how it ran.
 
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Stephen Hill said:
Different manufacturers produce peashooters that vary in loudness. It would be useful to know who made yours. I have never heard of a db killer for Commando peashooters. You might be able to pack it with some fiberglass. Keeping it in place could be a challenge. Not sure how this would affect how it ran.
Click to expand...
Yeah , I'm looking for louder myself .
Who made yours ?
 
Torontonian said:
Yeah , I'm looking for louder myself .
Who made yours ?
Click to expand...
The EMGO peashooters are very loud. The originals have a perforated tube with triangle projections sticking into the exhaust flow like an old "church key" would make and then a baffle in the end. The EMGO ones have only the perforated tube. They are also nice thick metal.
 
Snakepit said:
Has anyone come up with something to tone down aftermarket peashooters. Just bought a set for my 71 Commando. A little loud for my liking.
Click to expand...
You can use and over expanded rawlbolt in the end of a pea shooter to tame it down
I have done this in the past
But a balance pipe on the downpipes will quieten it down
 
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Measure the ID then look on eBay for DB killers of that size (use mm).

There are lots of cheap offerings of different types, sports bike riders with aftermarket cans is the main market.

You can drill up from the bottom to secure with a bolt.

The are lots of different designs offering different levels of restriction and thus performance impact. You really do not need anything super restrictive in order to make a surprising difference to the noise.

I did this on mine as I was concerned it wouldn’t pass track day noise tests. But it actually measures just on the limit so I haven’t needed to use them (yet).
 
Go to AN and look at location 18. They are NLA but simply reduce the diameter of the exhaust orifice. Stamped sheet metal. I have them on
my bike, they came from AN some years ago and I believe they said they
were the last pair they had. Simple enough to make, odd they don't run some up. They reduced some of the bite of the exhaust note. How much they affect the performance I cannot say, no dyno.
andover-norton.co.uk

Andover Norton Parts Drawings - Andover Norton Factory Parts - Commando Parts

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk
 
Onder said:
Go to AN and look at location 18. They are NLA but simply reduce the diameter of the exhaust orifice. Stamped sheet metal. I have them on
my bike, they came from AN some years ago and I believe they said they
were the last pair they had. Simple enough to make, odd they don't run some up. They reduced some of the bite of the exhaust note. How much they affect the performance I cannot say, no dyno.
andover-norton.co.uk

Andover Norton Parts Drawings - Andover Norton Factory Parts - Commando Parts

Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk
Click to expand...
How ludicrous! AN now sell the screw (part #36 for 750 & #19 for 850)) to hold that mute in but don't list the actual mute (part #35 for 750 & #18 for 850). FFS! Are they now part of the public service?
Look at Norton 750/850 1973
 
Hey - do what we used to do Many MANY years ago! I used these on several of my motorcycles, including 4 cyl Hondas with aftermarket exhaust, to get out of the neighborhood without waking everybody up! http://tomstoys.50webs.com/snuff.html
Nowadays you'd have to make your own. :(

This added a few minutes later: A cool thing you could do with a 4 cyl honda was open the snuffer on different pipes so that it could sound like a single, a twin or all four!
 
I had a C&G 3/1 exhaust on a Trident years ago with something similar, there was a central bolt and turned one way for full noise and the other way for quiet, trouble was the quiet setting killed any power.
 
trident sam said:
I had a C&G 3/1 exhaust on a Trident years ago with something similar, there was a central bolt and turned one way for full noise and the other way for quiet, trouble was the quiet setting killed any power.
Click to expand...
I remember those
They always looked trick with the aluminium finned collector
Were they any good?
 
baz said:
I remember those
They always looked trick with the aluminium finned collector
Were they any good?
Click to expand...
To be honest no they were crap, loadsa noise and go after 6000 rpm but not much before, I put a pair of rayguns on (fishtails as they were known then) and they transformed the bike
 
Picked these up from amazon...https://www.amazon.ca/dp/B07QFPHQHB?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 . They'll need some modifying but should be good
 


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