klr600 muffler

[coolmaduro]

All, I have a 2002 with about 1200 miles on it and I just started hearing a strange noise coming from the engine. Now, let's see if I can describe it. It is an intermittent noise that is not there when sitting still idling. In fact, I don't even hear it when revving my engine (also, when sitting still). However, under load when accelerating, I hear something that sounds almost like a small piece of metal being thrown around in the engine. It's not a "hard" sound like maybe nut or screw would make but like a very light piece of metal. The sound is a faint rattling "ting" and sounds as if it is coming from the left side of the engine. I hear the sound from around 2k to 4k rpms, again only under load. I hate asking questions like this since it is almost impossible to answer without hearing it but I thought that someone might have some insight. I would hope to have an idea of what it might be before the sound drives me crazy and I tear the engine apart trying to track it down. Oh, I also did my 500 mile valve adjustment about 200 miles ago (a little late). Three valves were at the low end of the tolerance range and one was below tolerance. I adjusted all to the upper end of the range. Thanks in advance for any suggestions. -cm

[dooden]

Have you adjusted the balancer chain ? (doohickey) There are a few web pages that describ in detail how to adjust. Dooden

--- In DSN_klr650@y..., "coolmaduro" wrote: > All, > > I have a 2002 with about 1200 miles on it and I just started hearing > a > strange noise coming from the engine. Now, let's see if I can > describe it. It is an intermittent noise that is not there when > sitting still idling. In fact, I don't even hear it when revving my > engine (also, when sitting still). However, under load when > accelerating, I hear something that sounds almost like a small piece > of metal being thrown around in the engine. It's not a "hard" sound > like maybe nut or screw would make but like a very light piece of > metal. The sound is a faint rattling "ting" and sounds as if it is > coming from the left side of the engine. I hear the sound from > around > 2k to 4k rpms, again only under load. I hate asking questions like > this since it is almost impossible to answer without hearing it but I > thought that someone might have some insight. I would hope to have > an > idea of what it might be before the sound drives me crazy and I tear > the engine apart trying to track it down. > > Oh, I also did my 500 mile valve adjustment about 200 miles ago (a > little late). Three valves were at the low end of the tolerance > range > and one was below tolerance. I adjusted all to the upper end of the > range. > > Thanks in advance for any suggestions. > > -cm

[Krgrife@aol.com]

In a message dated 11/27/02 9:40:51 AM Pacific Standard Time, coolmaduro1@... writes: << However, under load when accelerating, I hear something that sounds almost like a small piece of metal being thrown around in the engine. It's not a "hard" sound like maybe nut or screw would make but like a very light piece of metal. The sound is a faint rattling "ting" and sounds as if it is coming from the left side of the engine. I hear the sound from around 2k to 4k rpms, again only under load. >> Sounds very much like you are describing "pinging" or "predetonation" caused by an overly lean mid range especially since it happens under load in the rpm area that is jetted very lean on stock carb jetting. I also had some pinging like this and after turning the pilot screw out to 2 1/4 turns and shimming the needle jet .0020" it went away. If you are burning regular gas try a higher octane and if the pinging goes away you have found the problem. Kurt Grife

[coolmaduro]

--- In DSN_klr650@y..., Krgrife@a... wrote:

> In a message dated 11/27/02 9:40:51 AM Pacific Standard Time, > coolmaduro1@a... writes: > > accelerating, I hear something that sounds almost like a small

piece

> of metal being thrown around in the engine. It's not a "hard"

sound

> like maybe nut or screw would make but like a very light piece of > metal. The sound is a faint rattling "ting" and sounds as if it

is

> coming from the left side of the engine. I hear the sound from > around > 2k to 4k rpms, again only under load. >> > > Sounds very much like you are describing "pinging" or

"predetonation" caused

> by an overly lean mid range especially since it happens under load

in the rpm

> area that is jetted very lean on stock carb jetting. I also had

some pinging

> like this and after turning the pilot screw out to 2 1/4 turns and

shimming

> the needle jet .0020" it went away. If you are burning regular gas

try a

> higher octane and if the pinging goes away you have found the

problem.

> Kurt Grife

Thanks Kurt, that's one thing I didn't think about. I will definitely put in premium to see if it goes away. If it does, I will do the pilot screw adjustment. -cm

[coolmaduro]

--- In DSN_klr650@y..., "dooden" wrote:

> Have you adjusted the balancer chain ? (doohickey) > > There are a few web pages that describ in detail how to adjust. > > Dooden

Sorry, I didn't mention that. Yes, I adjusted the balancer chain the same time I did the valve adjustment. -cm

[Larry Risley]

----- Original Message ----- From: "coolmaduro" Subject: [DSN_klr650] Strange Engine Noise > > I have a 2002 with about 1200 miles on it and I just started hearing > a > strange noise coming from the engine. I had a rock bouncing around on top of the chain at the counter shaft sprocket, sort of lodged in the area between the chain and the case. Maybe a half inch rock, no damage. Larry

[Tom Rothoehler]

I wonder if its because of detonation and bad gas like pinging? Could it be from changing some combustion parameters during the valve adjust? -----Original Message----- From: dooden [mailto:dooden@...] Sent: Wednesday, November 27, 2002 10:14 AM To: DSN_klr650@yahoogroups.com Subject: [DSN_klr650] Re: Strange Engine Noise Have you adjusted the balancer chain ? (doohickey) There are a few web pages that describ in detail how to adjust. Dooden

--- In DSN_klr650@y..., "coolmaduro" wrote: > All, > > I have a 2002 with about 1200 miles on it and I just started hearing a > strange noise coming from the engine. Now, let's see if I can > describe it. It is an intermittent noise that is not there when > sitting still idling. In fact, I don't even hear it when revving my > engine (also, when sitting still). However, under load when > accelerating, I hear something that sounds almost like a small piece > of metal being thrown around in the engine. It's not a "hard" sound > like maybe nut or screw would make but like a very light piece of > metal. The sound is a faint rattling "ting" and sounds as if it is > coming from the left side of the engine. I hear the sound from > around > 2k to 4k rpms, again only under load. I hate asking questions like > this since it is almost impossible to answer without hearing it but I > thought that someone might have some insight. I would hope to have an > idea of what it might be before the sound drives me crazy and I tear > the engine apart trying to track it down. > > Oh, I also did my 500 mile valve adjustment about 200 miles ago (a > little late). Three valves were at the low end of the tolerance > range > and one was below tolerance. I adjusted all to the upper end of the > range. > > Thanks in advance for any suggestions. > > -cm List sponsored by Dual Sport News at www.dualsportnews.com. List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html Unsubscribe by sending a blank message to: DSN_klr650-unsubscribe@yahoogroups.com . Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

[punkynlew]

Hey Cool: Try adjusting the the timing chain tension. It is a very simple thing to do. Just remove the rubber cover and expose the bolt head lower left side of engine case. Loosen the bolt no more than 2 turns, tap it a few times and tighten it. If this adjustment is not attended to for too long, it can cause terrible problems. I hope this advice is correct. It's the first time I have ever advised anyone on the mechanics of the KLR. I am not a mechanic. Those that are can confirm or correct what I have said. Good luck. Lew Waterman Punky, Lew & Achi 2 Americas Motopaseo

--- In DSN_klr650@y..., Krgrife@a... wrote: > In a message dated 11/27/02 9:40:51 AM Pacific Standard Time, > coolmaduro1@a... writes: > > accelerating, I hear something that sounds almost like a small piece > of metal being thrown around in the engine. It's not a "hard" sound > like maybe nut or screw would make but like a very light piece of > metal. The sound is a faint rattling "ting" and sounds as if it is > coming from the left side of the engine. I hear the sound from > around > 2k to 4k rpms, again only under load. >> > > Sounds very much like you are describing "pinging" or "predetonation" caused > by an overly lean mid range especially since it happens under load in the rpm > area that is jetted very lean on stock carb jetting. I also had some pinging > like this and after turning the pilot screw out to 2 1/4 turns and shimming > the needle jet .0020" it went away. If you are burning regular gas try a > higher octane and if the pinging goes away you have found the problem. > Kurt Grife

[Russell Dyck]

This is the same thing that my 02 KLR with 1700KLM on it hase been doing. except that my seems to start after I've gone down the highway for about 15-20KLMs and done some trail riding. I've adjusted the balancer chain and it still continues, I'm wondering if this could be a symptom of "doohicky desease". But for now I'm going to try useing some primium gas and see how that goes.

--- In DSN_klr650@y..., "coolmaduro" wrote: > All, > > I have a 2002 with about 1200 miles on it and I just started hearing > a > strange noise coming from the engine. Now, let's see if I can > describe it. It is an intermittent noise that is not there when > sitting still idling. In fact, I don't even hear it when revving my > engine (also, when sitting still). However, under load when > accelerating, I hear something that sounds almost like a small piece > of metal being thrown around in the engine. It's not a "hard" sound > like maybe nut or screw would make but like a very light piece of > metal. The sound is a faint rattling "ting" and sounds as if it is > coming from the left side of the engine. I hear the sound from > around > 2k to 4k rpms, again only under load. I hate asking questions like > this since it is almost impossible to answer without hearing it but I > thought that someone might have some insight. I would hope to have > an > idea of what it might be before the sound drives me crazy and I tear > the engine apart trying to track it down. > > Oh, I also did my 500 mile valve adjustment about 200 miles ago (a > little late). Three valves were at the low end of the tolerance > range > and one was below tolerance. I adjusted all to the upper end of the > range. > > Thanks in advance for any suggestions. > > -cm

[mwl_95623]

Go to the archives and do a search on Mysterious Squeak. To me it sounded like a squeak but my buddy who actually diagnosed the problem described the sound as a marble in a glass jar. The sound really does seem like it's comming from the left side of the engine but in our case the fairing was redirecting the noise and the culprit was actually the headlight assembly. Give this a try and let us know if it helps. Matt

--- In DSN_klr650@y..., "Russell Dyck" wrote: > This is the same thing that my 02 KLR with 1700KLM on it hase been > doing. > except that my seems to start after I've gone down the highway for > about 15-20KLMs and done some trail riding. > I've adjusted the balancer chain and it still continues, I'm > wondering if this could be a symptom of "doohicky desease". > But for now I'm going to try useing some primium gas and see how > that goes. > > > > > --- In DSN_klr650@y..., "coolmaduro" wrote: > > All, > > > > I have a 2002 with about 1200 miles on it and I just started > hearing > > a > > strange noise coming from the engine. Now, let's see if I can > > describe it. It is an intermittent noise that is not there when > > sitting still idling. In fact, I don't even hear it when revving > my > > engine (also, when sitting still). However, under load when > > accelerating, I hear something that sounds almost like a small > piece > > of metal being thrown around in the engine. It's not a "hard" > sound > > like maybe nut or screw would make but like a very light piece of > > metal. The sound is a faint rattling "ting" and sounds as if it > is > > coming from the left side of the engine. I hear the sound from > > around > > 2k to 4k rpms, again only under load. I hate asking questions > like > > this since it is almost impossible to answer without hearing it > but I > > thought that someone might have some insight. I would hope to have > > an > > idea of what it might be before the sound drives me crazy and I > tear > > the engine apart trying to track it down. > > > > Oh, I also did my 500 mile valve adjustment about 200 miles ago (a > > little late). Three valves were at the low end of the tolerance > > range > > and one was below tolerance. I adjusted all to the upper end of > the > > range. > > > > Thanks in advance for any suggestions. > > > > -cm