OEM exhaust noise level DB - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #1 of 49 Old 02-15-2019, 08:42 PM Thread Starter
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OEM exhaust noise level DB

Are the exhaust system/mufflers the same from 2008 on up? Anyone ever checked the decibel level(s)? Do you consider the stock muffler a Quite” one? .Since I have not bought a used KLR yet, I’m just curious.
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post #2 of 49 Old 02-16-2019, 10:14 AM
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I concider the stock muffler pretty quiet.
On the freeway with a full face helmet, the exhaust isn’t heard except slightly when accelerating hard.
It’s noise level and sound/pitch has been compared to a lawn mower, which I think is pretty accurate.

2016 KLR 650
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post #3 of 49 Old 02-16-2019, 12:20 PM
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The big ugly heavy zig-zag shaped steel oem muffler is the quietest muffler available & I like'em.

I'd rather drill 4 one inch holes into the straight top section of the dirty air box, above & behind the battery to allow more intake 'honk' than to open the muffler.

The bike will breath easier, run stronger and the rider hears the noise instead of the by-standers and everybody else behind a loud muffler.

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post #4 of 49 Old 02-16-2019, 01:10 PM
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Quote:
Originally Posted by pdwestman View Post
The big ugly heavy zig-zag shaped steel oem muffler is the quietest muffler available & I like'em.

I'd rather drill 4 one inch holes into the straight top section of the dirty air box, above & behind the battery to allow more intake 'honk' than to open the muffler.

The bike will breath easier, run stronger and the rider hears the noise instead of the by-standers and everybody else behind a loud muffler.
I was also considering an aftermarket muffler because of how ugly the OEM is, but you can't beat how quiet it is. That Lexx exhaust seems to be the quietest aftermarket available but still much louder than the OEM. Does anyone know of any other quiet aftermarket mufflers? (stupid question haha)
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post #5 of 49 Old 02-16-2019, 03:07 PM
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The Leo Vince X3 exhaust may be a touch quieter than your LEXX exhaust.

The Leo Vince X3 is baffled muffler, instead of a glass-pack like your LEXX, so the Leo Vince X3 never needs repacking like an OEM never needs repacking.

https://www.leovince.com/en-us/your-...bike=KLR%20650
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post #6 of 49 Old 02-16-2019, 03:32 PM
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[quote=pdwestman;679047]The Leo Vince X3 exhaust may be a touch quieter than your LEXX exhaust.

The Leo Vince X3 is baffled muffler, instead of a glass-pack like your LEXX, so the Leo Vince X3 never needs repacking like an OEM never needs repacking.

I don't own a LEXX yet, I was just referring to some reviews I've seen. My internet research makes me an expert! Haha just kidding. Once again thanks for the tip. Ill look into the Leo Vince.
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post #7 of 49 Old 02-16-2019, 08:12 PM
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Considering the later model mufflers incorporate a catalytic converter inside they may be a couple decibels quieter than early mufflers, but one would need a meter to compare.

Never pick a fight with an old man.. If he's too old to fight, he'll just kill you..
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post #8 of 49 Old 02-16-2019, 10:26 PM Thread Starter
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Thanks for the info. I was not aware they started using Cats in the 2008. I don’t have an issue with that providing they clear and not restricting by build up or whatever.
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post #9 of 49 Old 02-17-2019, 06:01 PM
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I think the cats started later. Possibly 2010 ?

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post #10 of 49 Old 02-18-2019, 11:09 AM
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yes, cats were later; around 2010.

There is nothing as quiet as the stock muffler (around 89db IIRC) and since I like quiet, I have nothing bad to say about keeping the stocker......however it is very heavy and ugly.

My silencer post:

A subjective topic but to recap recent discussions;

I don't like loud but I've replaced the stock silencers on both KLR's for several reasons, namely; lighter weight (5 - 7 lbs), better tone, better looks. .....I wouldn't recommend it thinking there will be a noticeable increase in power, nor would I put much faith in manufacturer's that claim much in the way of HP increases (with no other changes).

After much research and some testing, I like the LeoVince X3 which is relatively quiet at 94db, doesn't require repacking (the only one that doesn't AFAIK, except for the ridiculously expensive Staintune out of Australia), looks decent and has a spark arrestor and USFS compliance. Runner up would be the Lexx with the optional trail insert; also around 94db but it does require periodic repacking. I also like the FMF Q4 but it is a bit louder (though still trail compliant) at 96db (keep in mind that the increase in decibels isn't linear).

There are a great many aftermarket silencers on the market that are far too loud IMO and you'd do best to avoid them.

Good luck,

Dave
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