Exhaust help - 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 37 Old 04-03-2016, 10:20 PM Thread Starter
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Exhaust help

I bought my first klr last week a 15 with 506 miles. I've ridden it around 100 miles and I hate the sound of it! Sounds like I'm riding a sewing machine! What exhaust will give it a deeper throaty sound? I'm not looking for ear ringing just something that will make it sound like a motorcycle. I like the looks and price of the Lexx exhaust. Can you adjust the sound on it? With spark arrestors, or cores? Thanks for any help
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post #2 of 37 Old 04-03-2016, 10:25 PM
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I have the lexx and love it,others have done a mod to the stock muffler to make it sound better. I went for the lexx pretty much just for the price. Others will probably chime in soon. Ride safe
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post #3 of 37 Old 04-03-2016, 10:45 PM
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I too have a LEXX, I spent years trying to get the stock can to flow, I hate loud exhausts except for the throaty sounds when idling .....The LEXX is perfect! It comes with a quiet tip which is basically a spark arrester and chokes the can down by maybe 1/3 or more, but it works very very well....IF you remove this quiet tip it opens up completely and is LOUD, IMHO!!! BUT damn does it wake the bike up after engine mods ......I have installed maybe 6 LEXX's over the past 6 years...and I haven't heard of a single complaint about them. They are light and good looking and the sound is great!

Willys
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post #4 of 37 Old 04-04-2016, 03:45 AM
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I'm one of the stock-modified group.

Holesawed out the entire baffle weld and slid the whole thing out.
(1 3/4") Put on a tip, done. It's barely louder with all the other
plumbing in there plus the cat. Has some bark now, but not a head turner.
Still neighbor friendly,

Cheap

This is my son, with whom I am well pleased." ----God
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post #5 of 37 Old 04-04-2016, 07:40 AM
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IF you do choose to do the free exhaust mod so to speak, do it in stages and not take the entire last portion of the baffles out of your muffler. When you look at the back of your can you'll see the pipe that actually comes out of the can, around thia you will see an indented area, this is where you want to drill into, NOT on the raised part. IF you do drill on the raised portion you will basically remove the last 4" of the baffles rendering the muffler open as you have just removed the last baffle system, not just the tweety tube which I think you are looking to remove. I ude a 1/8" drill bit and simply drill all around the indented area until I can easily chisel the holes together....then you want a good solid metal bar to stick into the muffler until it stops, about 10" or so....then start wiggling the bar in a circular motion as you are trying to snap 3 small spot welds deep at the end of that tube.....once you manage to snap those welds that tube will come out but it may be a bit of a bugger being all sharp etc from the drilling and chiseling, but it will come out. After it is out simply clean up the hole that is left with a die gringer of file and then find a steel tube like an exhaust adapter from your local automotive store, I think I use 1 3/4" pipe personally. I also cut the end at a slight angle to redirect the hot gasses slightly away from the plastics of the bike. Weld it on and paint and it's done! The tube you take out is about an inch in diameter and it's perforated similar to the old Volkswagen muffler pipes on the bugs of years ago.
This is what we call de-tweetying the KLR or something similar...it's basically free if you have use of the tools needed and have a piece of pipe laying around to use.....but if you want something better and you can afford, buy the LEXX. it took me years to come to this realization! I thought I could get the stock can to flow but failed.....they have designed it to interrupt the flow of air as it travels through the entire muffler not just at the end you are playing with. The belly down low is where the worst happens....and it's too difficult to fix what they have designed it to do...I have tried and it's just not worth all the work.

Hope this helps

Willys
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post #6 of 37 Old 04-04-2016, 10:20 AM
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If you are on a budget get the Lexx and use the quiet/enduro tip.....not a bad idea to upgrade the packing as well. If you can afford it the LeoVince X3 offers similar sound levels around 93-94 db without the repacking requirement.


Dave
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post #7 of 37 Old 04-04-2016, 11:17 AM
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Originally Posted by DPelletier View Post
If you are on a budget get the Lexx and use the quiet/enduro tip.....not a bad idea to upgrade the packing as well. If you can afford it the LeoVince X3 offers similar sound levels around 93-94 db without the repacking requirement.


Dave
I did just this as I thought the packing wasn't great, I bought the best mney can buy, and found out that the packing was perfectly good indise the LEXX and wasted my money when not needed to be touched....just saying....I had run the LEXX for a year at this time.....no noticable wear or burning of the stock packing....I did install the far better packing and it is the same level of sound as it was when new.

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post #8 of 37 Old 04-04-2016, 11:48 AM
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Originally Posted by willys View Post
I did just this as I thought the packing wasn't great, I bought the best mney can buy, and found out that the packing was perfectly good indise the LEXX and wasted my money when not needed to be touched....just saying....I had run the LEXX for a year at this time.....no noticable wear or burning of the stock packing....I did install the far better packing and it is the same level of sound as it was when new.
My friend Chuck has experimented with a combo of high quality silencer packing and SS wool. He claims (and has checked it with a db meter) that his custom packing is quieter and lasts longer than the stuff that comes in the Lexx pipe.

ymmv,

Dave
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post #9 of 37 Old 04-04-2016, 11:53 AM
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Thats great, but the stock packing is very good in the LEXX from the factory so why pull it out like I did just to spend on new just to try and get it slightly quieter...been there done that so to speak....the differences are not worth the money IMHO....just saying.....for someone simply looking to buy an aftermarket can, IMHO they can't go wrong with a LEXX...plain and simple...it's easily taken apart, and repacked IF needed, I bet mine would have easily lasted another year by the shape of the packing when i pulled it out.......some cans are riveted togetrher which makes disassembly edifficult etc where the LEXX is all allen head bolds, it just is a nice can and inexpensive!

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post #10 of 37 Old 04-04-2016, 12:35 PM
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Originally Posted by willys View Post
Thats great, but the stock packing is very good in the LEXX from the factory so why pull it out like I did just to spend on new just to try and get it slightly quieter...been there done that so to speak....the differences are not worth the money IMHO....just saying.....for someone simply looking to buy an aftermarket can, IMHO they can't go wrong with a LEXX...plain and simple...it's easily taken apart, and repacked IF needed, I bet mine would have easily lasted another year by the shape of the packing when i pulled it out.......some cans are riveted togetrher which makes disassembly edifficult etc where the LEXX is all allen head bolds, it just is a nice can and inexpensive!
Well, I should have clarified what I meant by "better"....the combo with SS wool isn't what you tried therefore you don't know how it compares. Chuck has done this on dozens of Lexx's and said it's better and I trust him.
Do you need to replace the packing? nope. If nothing else it is worth considering when the silencer needs to be repacked anyway.

As far as repacking requirements go; it all depends on use: miles, hours and rpm's. I agree that the 40 hours that some silencers recommend is usually excessive to say the least.....whether it'll last a year or two or need to be done in 3 months or 6 months is going to vary.

I have no experience with the Lexx but it's said to be a decent silencer, especially for the price. I like the FMF Q4 as well which is also a packing type silencer, very high quality and is an easier install with the one pce design but it is a bit louder at 96db.

The LeoVince X3 is as quiet or quieter than any other KLR silencer that has been tested, has decent performance, comes with 4 tips and doesn't require repacking....ever...but it is more expensive.

The Staintune is also purported to be a high quality unit and also doesn't need repacking but the exhorbitant cost push it out of contention. I also couldn't find reliable info on weight and db output.

My silencer recommendations boil down to this;

- LeoVince X3; 94db, good quality, good performance, USFS spark arrestor, no packing. most expensive of the 3.

- Lexx; 94db (with enduro tip), decent quality, good performance, USFS spark arrestor, packing type. cheapest of the 3

- FMF Q4; 96db, good quality, easy install, lightest weight, good performance, USFS spark arrestor, packing type. lightest and easiest install of the 3.

Cheers,
Dave
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