Which Exhaust system is best for 2011 - 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 14 Old 08-15-2016, 02:42 PM Thread Starter
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Which Exhaust system is best for 2011

I'm looking to upgrade my exhaust system to something that has a deeper sound then stock. Any suggestions?
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post #2 of 14 Old 08-15-2016, 03:57 PM
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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 Austrailia), looks decent and has a spark arrestor and USFS compliance. Runner up would be the Lexx with the optional quiet 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

Last edited by DPelletier; 08-15-2016 at 04:12 PM.
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post #3 of 14 Old 08-15-2016, 04:36 PM
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Debaffled stock is a popular, and of course, the cheapest option.

The positives are perfect fit, enhanced flow, barely louder sound, (the front half
of the muffler keeps it from getting too loud), and the price.

The negatives are that it can't go back to stock, (there's inserts available tho),
still weighs too much, and is big n' ugly. lol

If you like to play with sheetmetal tubes n' such, here's what I landed on just cuz it was
laying around:
Ran debaffled stock muffler 6 years then this spring yanked one of the mufflers off
of my junk 1985 Hondamatic 400 CM. The diameter was within thousandths luckily of
the KLR header-to-Honda first piece. I needed that 8-9 inches of pipe with the bend and
a chunk of the Honda header served that bridge from KLR pipe to muffler. (where I could easily
bolt on a little mount bracket). Being a 400 2 cyl the muffler was wonderfully small but so was
the outlet. Gutted the rear half and left the front perforated tube and diverter, and put on a pretty
end cap.

Just babbling a bit in case you like to do that stuff. The sky's the limit.
Any real world info you truly need is already answered above.
Any other brand may give you 3 hp at 8,000 rpms which the bike
will never see and all the neighbors will hate you. Might as well
run an open pipe at that point. (I know you are just looking for
a little more bark) The Lexx is on my wish list,

CheapMark

This is my son, with whom I am well pleased." ----God
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post #4 of 14 Old 09-23-2016, 08:01 AM Thread Starter
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Well I broke down and bought a DG slip on exhaust. I will have to tell you that this bike sounds like a beast now. Oh yeah not to mention the horsepower icrease. Im not sure how much more horsepower the bike has but I can definitely notice a difference. You better be holding on to the bike when you twist your wrist now. Im loving the response that I'm getting from the bike now.
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post #5 of 14 Old 09-23-2016, 10:30 AM
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The factory jetting is overly lean (thanks EPA!) at some throttle settings and an aftermarket silencer may exacerbate the problem. Consider a KLX kit (available from Eagle Mfg & Eng ) as well as removing the airbox snorkle at a minimum.....an L mod to the airbox top or 4 1" holes (being careful to keep them on the dirty side!) also help if you're so inclined.

Dave
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post #6 of 14 Old 09-23-2016, 03:40 PM Thread Starter
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This bike came from Colorado so i dont have all the smog crap. My brother has a California bike and his is deffinatly a different beast. As for the air box I will do that. The better this thing can breathe the better it will perform. Thanks Dave.
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post #7 of 14 Old 09-23-2016, 04:00 PM
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...just to be clear, all KLR's use the same needle and jet (well there was a slight change gen1 to 2 on the main jet but...) so the overly lean condition isn't limited to Cali bikes.

Cheers,
Dave
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post #8 of 14 Old 09-23-2016, 04:27 PM
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Quote:
Originally Posted by kspence74 View Post
This bike came from Colorado so i dont have all the smog crap. My brother has a California bike and his is deffinatly a different beast. As for the air box I will do that. The better this thing can breathe the better it will perform. Thanks Dave.
They can and Do sell California bikes in all 50 states if they are short on 49 state models!

And like Dave said, there ain't much difference. (Only the Evaporative Emissions Charcoal Can and plumbing.)

If you purchased the bike used, I will just ask if the fuel tank has 1 or 2 vent nipples under the tongue of the seat?

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
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post #9 of 14 Old 09-23-2016, 08:13 PM Thread Starter
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When I pull my seat to change the air filter and drill the intake holes I will check. I do know that I don't have the charcoal can and plumbing.
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post #10 of 14 Old 09-23-2016, 08:18 PM Thread Starter
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Im a fabricator by trade and I was thinking of cutting a large window into the top od the air box on the dirty air side and putting a piece of thin perforated stainless steel into the air box from the access side and riviting it into the air box. The hole diameter will be 1/4" on a 5/16" staggered centers. Im thinking that this will allow more air into the air box then just drilling holes. What are your thoughts Dave?
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