Low-buck Exhaust mod and Heat Dissipation - 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 16 Old 04-18-2011, 08:19 PM Thread Starter
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Low-buck Exhaust mod and Heat Dissipation

I detest loud bikes. In 33 years of riding I have modified 2 bikes to make them louder. I still race a KDX and the latest whiz-bang thunder pig 450's can't hear me back there trying to pass so I shortened the silencer. It was kinder than burning their leg. The other is my SV650 track bike. The Gixxer Boi's complain that I was scaring the snot out of them coming up the inside on my "electric" bike so I again shortened the can. Both of these bikes could be ridden to church (late) and no one would here me creep in.

I am looking to the low-buck mod to dump some heat from the can. I just mounted up a TCI Denali rack on my '11 and I fear my soft bag of choice (US Army Alice packs) may take a beating on the mounting (shoulder) straps. Does this mod even give you a lower temperature at the can?

Here are my questions after WAY too much setup:

A. How freaking disgustingly loud is it going to get... (I am perfectly happy listening to the chain purr and the piston slap. It soothes me.)

B. With a stock air-box am I going to have to re-jet. I have tweaked the pilot screw and don't want to go any further.

C. MPG... I've been riding it 8 days now (700 Miles) for an average of 44.5MPG. That ain't cutting mustard. Will the mod affect MPG up or down?

Toodles and so forth.

Your Pal,
AJay

"Heroes may not be braver than anyone else. They're just braver five minutes longer." - RWR

Last edited by AJay112; 04-18-2011 at 08:39 PM.
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post #2 of 16 Old 04-18-2011, 08:56 PM
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Mine's stock too. I like throaty bikes on occasion, but when cruising along the highway a quiet bike is nice so your head isn't ringing when you're done. My bud cored out his exhaust. Sounds nice without being too loud.
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post #3 of 16 Old 04-18-2011, 10:19 PM Thread Starter
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Originally Posted by Savage View Post
Mine's stock too. I like throaty bikes on occasion, but when cruising along the highway a quiet bike is nice so your head isn't ringing when you're done. My bud cored out his exhaust. Sounds nice without being too loud.
Changin' the tone wouldn't bother me if I knew it was going to lower the temp of that muffler can a bit.

Life is of course a compromise... I just don't want to compromise stealth for nothing

"Heroes may not be braver than anyone else. They're just braver five minutes longer." - RWR
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post #4 of 16 Old 04-19-2011, 09:40 AM
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I detest loud bikes.
Your Pal,
AJay
AJay,
I like you...
I just sold my loud bike, a 2008 GoldWing.. The exhast wasn't loud, but the stereo tended to be..

I'm not much help with your questions, but I'm posting to see if there's a possible other direction to go?? Does anyone make guarding for the exhaust?? I have a small stainless guard for my 02' that's insulated on the inside, against the pipe.. Just took one screw to install..

Since I don't have a Gen 2 bike to go look at, I just thought I'd throw the option out there as a thought??

Good luck!!

Mileage is goofy on these bikes.. They're all pretty much the same, yet nobody gets the same mileage.. I get 50mpg and that's with full luggage.. I'm far from polite to my throttle, either..
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post #5 of 16 Old 04-19-2011, 11:02 AM
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I dont think ive ever got 50mpg. As far as noise, the only thing i hear is roar of my knobbies. LOCKJAW, feel free to chime in with a gardening tip.....

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post #6 of 16 Old 04-19-2011, 03:34 PM
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Don't know much about gardening, but my MPG is terrible and I do wear earplugs when I remember.




"In a car you're always in a compartment, and because you're used to it you don't realize that through that car window everything you see is just more TV." R. Pirsig

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post #7 of 16 Old 04-19-2011, 04:20 PM
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I thought the general consensus on ADV was that these were getting 55 mpg. You guys that are getting lower mpg, have you modded your bikes? (maybe this shouldn't be in this thread?)Good topic; moved to new thread. T

Here's a question more similar to the original post.
I notice the heat shield on my header is touching the header. Have any of you tried to space it out so it doesn't touch. I've noticed the shield gets quite hot.

Last edited by Tom Schmitz; 04-19-2011 at 04:42 PM.
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post #8 of 16 Old 04-19-2011, 05:43 PM Thread Starter
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Don't know much about gardening, but my MPG is terrible and I do wear earplugs when I remember.
+1

Got a copy of "Gardening for Idiots" on the back of the toilet and keep the earplugs next to my wallet on the workbench.

If someone can develop a bacon scented spray wax my bucket list will pretty much be down to a life-size Steve McQueen tattoo and someone getting my order correct at a Hardee's.

"Heroes may not be braver than anyone else. They're just braver five minutes longer." - RWR
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post #9 of 16 Old 04-26-2011, 08:13 AM
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Like you I hate loud bikes.
After 45 years of racing off road, (nothin' worse than coming up behind a 450 with the freakin loud silencers, getting stuck behind them and having to put up with the freakin noise), (I race a KTM 200 2 smoker). After years of abuse, my ears hurt when a certain tone hits them, and for some reason bike exhaust seems to hurt them.
On my KLR I wanted to get rid of the "Chrip can" exhaust, but didnt want it to sound like a quad with a empty muffler can.
I dropped on the Lexx muffler, was cheap and really not much louder in stock form with the spark arrestor in place.
I had opened the air box up and had to rejet the bike, I installed the KLX needle also.
I wear ear plugs when I ride, but my wife says it's not much louder than before. I like the over all sound, not much louder than my Hsarley with stock mufflers.
Joe
Just an old guys thoughts and ideas. These should be taken with a can er 2 of brew!
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post #10 of 16 Old 04-26-2011, 09:11 PM
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First off, your new KLR comes tuned too lean. I was told that it is tuned on a bench and not on the bike. If ya don't believe me, pull your plug and see what color it is. It shouldn't be white or black, just a nice tan. I adjusted mine when I got her and the temp went down.

If you want an exhaust mod that is easy on the wallet, not loud (a nice lower tone), and very reliable, then give this a try:

http://klrworld.com/forums/index.php/topic,9879.0.html

Notice when this was posted. I have over 30k on the mod and it still sounds great and works great also.

My mileage after I removed the snorkel, popped 3 1" holes in the top of the air box, installed a UNI filter, installed a KLX needle, drilled the slide, and jetted it to 142, and did the frugal exhaust mod is within 3-4mpg. It's just a bunch more fun now.

The noise is not that much louder, not like some aftermarkets. i ride mine everyday to work and no one haws had a negative comment about the noise.

Look it over and see what others have said about it.
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