A question of quiet

Ascot500 · 07-03-2020, 09:04 AM

So I have this old 350 (1974) that I recently got running. It currently has an EMGO megaphone muffler that is just too noisy.
So I'm thinking of getting a pit bike muffler like the one in the picture - it has a 38mm inlet that matches my pipe.
But can anyone tell me if it's really going to tone down the racket or am I throwing away my money?

Oddball Matt · 07-03-2020, 09:17 AM

Cheap
Small
Quiet

The basic chart of buying an aftermarket muffler. Pick any two. If you find one that ticks all boxes do tell.

More straight answer, unlikely. Pitbikes aren't trying to be quiet, that's really more a spark arrestor than an actual muffler.

Ascot500 · 07-03-2020, 12:03 PM

Good point.
I am not married to it being cheap or small.
I'd just hate to spend a lot and it still be loud.

I am open to suggestions...

franque · 07-03-2020, 12:30 PM

You might just have to repack it with insulation to get it working the way you'd like it to, but that shouldn't be a problem, just drill out the rivets, and then re rivet when done.

Ascot500 · 07-03-2020, 12:48 PM

By "it" do you meat the pit bike muffler?
What insulation?
Fiberglass?

franque · 07-03-2020, 02:06 PM

Yes, the pit bike muffler; usually fiberglass, they use a special kind for mufflers, it shouldn't be too crazy expensive.

Mudflap · 07-03-2020, 03:43 PM

I have what appears to be that same one. Was going to use it on a project but it was way too loud. Just a straight through glass pack.

Its_not_a_honda · 07-03-2020, 04:48 PM

Not trying to be funny. Go get one for the 2020 klx300r. That is the quietest muffler on a dirt bike I've ever heard. Probably $$$$ but dang it is quiet.

07-03-2020, 09:17 AM	#2
Oddball Matt Join Date: Jan 2020 Location: Vääksy, Finland Posts: 401	Cheap Small Quiet The basic chart of buying an aftermarket muffler. Pick any two. If you find one that ticks all boxes do tell. More straight answer, unlikely. Pitbikes aren't trying to be quiet, that's really more a spark arrestor than an actual muffler. __________________ 2004 Longjia Grido 50 scooter 1999 Cagiva Mito 125 Evo, Yamaha XV125 engine, Ducati SS fairings, getting turboed 1993 Yamaha GTS 1000 Ex:Bashan BS200-S7 `07 Streetfighter-quad
	1

07-03-2020, 04:48 PM	#8
Its_not_a_honda Join Date: Jan 2018 Posts: 410	Not trying to be funny. Go get one for the 2020 klx300r. That is the quietest muffler on a dirt bike I've ever heard. Probably $$$$ but dang it is quiet. __________________ 2020 Kawasaki KLX300R, 2018 Yamaha TW200 If you want more of something, tax it less. If you want less of something, tax it more.
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07-03-2020, 12:03 PM	#3
Ascot500 Join Date: Apr 2007 Posts: 90	Good point. I am not married to it being cheap or small. I'd just hate to spend a lot and it still be loud. I am open to suggestions...
	0

07-03-2020, 12:30 PM	#4
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	You might just have to repack it with insulation to get it working the way you'd like it to, but that shouldn't be a problem, just drill out the rivets, and then re rivet when done.
	0

07-03-2020, 12:48 PM	#5
Ascot500 Join Date: Apr 2007 Posts: 90	By "it" do you meat the pit bike muffler? What insulation? Fiberglass?
	0

07-03-2020, 02:06 PM	#6
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	Yes, the pit bike muffler; usually fiberglass, they use a special kind for mufflers, it shouldn't be too crazy expensive.
	0

07-03-2020, 03:43 PM	#7
Mudflap Join Date: Sep 2014 Posts: 1,870	I have what appears to be that same one. Was going to use it on a project but it was way too loud. Just a straight through glass pack.
	0