the 12 klr days of christmas

DSN_KLR650
Stu
Posts: 399
Joined: Wed Dec 20, 2000 5:03 pm

aftermarket exhaust results

Post by Stu » Sat Dec 13, 2014 9:53 am

Hey all - Happy Holidays. Anyway - it is still ridin' weather down here, at least for a while longer.   I just finished installing an FMF Q4 exhaust and FMF header on my 2002 KLR. I do believe in helping an engine pump air with less resistance.  That said, I also believe those who said the Factory original pipe was designed pretty good albeit a little heavy. I was ok with the sound of my KLR - I'm not into loud pipes, and she wasn't a whistler, but some things just didn't feel right.   So, I'm thinking - a 12 year old bike with only 6500 miles when I bought her.  Hmmm, there could be rust plugged baffles in the exhaust - since that is what happens when they sit up. So, in an effort to just make my old gal more tractable and smoother, I jumped in for the exhaust system.  (The header was claimed to also help make it quieter in addition to being designed to flow better with their exhaust.)  I will say she has a snarl now - not offensively loud - but close.  And, according to my rear-end dynamometer, she runs smoother and pulls more gracefully all the way up through the rpms. Maybe it doesn't make any difference on a working exhaust, but it sure woke up Sheila and gave her pep so I suspect her old exhaust was not flowing well.   Next will "Maybe" be the jet kit...  Actually I'm on the fence about the necessity of that, but there seems to be compelling arguments in favor of doing the mod, particularly on the first gen bikes.  Optionally, in for a dime - in for a dollar - maybe the Mikuni carb swap. I'm not a micro-tuner - kinda' want her to do well across the power band and not worry too much about trying to optimize for any one set of circumstances- I'm not that good of a rider that I would be able to tell if I was losing 20# of torque. Thoughts, suggestions or experience from anyone??- and yeah I've scoured forums and read everything from replace the carb completely to stock works just fine even at high altitudes.   Which suggests either very poor quality control from our friends at the Kawa production factories or some folks simply like leaving well enough alone unless it breaks... or after-market tuning can produce some desirable results as long as there is a plan and a realistic expectation of results. And heck, I'm still considering the 685 kit - to reduce vibration as much as anything. Feedback and comments are welcome... The goal for the bike is to enjoy - so I don't want to trade performance at the expense of dependability, but I want to make the girl ready for whatever may lay ahead for us.  So far, everything I have added has made her more enjoyable to ride. Thanks, Stu

landsail
Posts: 19
Joined: Sat Aug 22, 2009 10:32 pm

aftermarket exhaust results

Post by landsail » Sun Dec 14, 2014 9:39 am

What I have done to my 2007 KLR since new: Laser Duro Pro exhaust( all metal, no fiberglass, deep sound), FMF Powerbomb header, Dynojet carb kit set for 4,400 ft, K&N air cleaner, "L" Shaped hole in the air box. Remaining work is a 685 cc piston kit. Result: slightly less gas mileage (45 mpg), greater smooth acceleration and some intake noise that is pleasant. I like my mods so far with a lot of other farkles to suspension and frame/luggage/lighting mods. This bike is still slower than my Hayabusa or Yamaha FZ1, always more fun touring and dual sport riding in the Sierras or Nevada desert going to landsailing events. Mark

Norm Keller
Posts: 712
Joined: Thu Apr 01, 2004 7:48 am

aftermarket exhaust results

Post by Norm Keller » Sun Dec 14, 2014 11:34 am

Are you able to do some quantitative comparisons before versus after your exhaust replacement?
 
When we have done this, using 3rd gear roll ons, the stock system has always won out, but I continue to hope that some exhaust system may produce significant gain without excessive noise. This has not been the case, in fact the reverse in both power and noise, IME. That includes rejetting both before and after. If one compares a stock bike with one having an aftermarket exhaust + air box and rejetting, this is not a useful comparison, IMO. To have a useful comparison, one must rejet the stock one, then compare, replace the exhaust + rejet as required, then compare.
 
Few of us are free of fulfilling our preconceptions and these shape our impressions to a remarkable degree. If there are those who are free of this, I am not one of their number so require measurement.
 
 

Stu
Posts: 399
Joined: Wed Dec 20, 2000 5:03 pm

aftermarket exhaust results

Post by Stu » Sun Dec 14, 2014 6:24 pm

Hey all, No quantitative metrics - but before the exhaust, the old girl had nothing below 3k rpm and ran out of breath at anything over 4k. Now, I can be cruising at 2500 rpm and give her gas to climb a good hill w/o having to downshift. I'm not saying this is the panacea for all, but I don't think Sheila was even doing stock numbers before. Now, doing the same roads I take all of the time, she is peppier, and doesn't seem to stutter and stumble. A 12 year old bike with less than 7000 miles that sat for 3 years is a good candidate for a clogged exhaust is all I was thinking and rather than replace with an OEM, I went with lighter. Of course there are folks out there who have dyno'ed and swear they can document results of rejetting, after market exhaust systems, 685 ++ kits, Mikuni carbs etc... They may have all worked for the representing product too. In my experience racing sports cars though (many years ago), a tuned exhaust was and still is cheap bolt on performance. Maybe because the KLR is so simple, it is almost moot - just a pipe with one major bend and one minor bend. As I said, I probably would not have changed mine except that the old girl was not running the way she should have been running. The shiny metal even looks a little out of place, but I sure am enjoying riding her more. And her snarl is not like my old 650 Triumph Bonneville but she has certainly found her voice. Not to trying to be adversarial - I certainly don't know these bikes as well as most of ya'll - yet, but I do think each case can stand on its own sometimes. I wish I had some way I could have documented before and after just out of curiosity. Stu
----- Original Message ----- From: "'Norm Keller' normkel32@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> To: "DSN KLR650" DSN_KLR650@yahoogroups.com> Sent: Sunday, December 14, 2014 12:32:02 PM Subject: [DSN_KLR650] Re: Aftermarket exhaust results Are you able to do some quantitative comparisons before versus after your exhaust replacement? When we have done this, using 3rd gear roll ons, the stock system has always won out, but I continue to hope that some exhaust system may produce significant gain without excessive noise. This has not been the case, in fact the reverse in both power and noise, IME. That includes rejetting both before and after. If one compares a stock bike with one having an aftermarket exhaust + air box and rejetting, this is not a useful comparison, IMO. To have a useful comparison, one must rejet the stock one, then compare, replace the exhaust + rejet as required, then compare. Few of us are free of fulfilling our preconceptions and these shape our impressions to a remarkable degree. If there are those who are free of this, I am not one of their number so require measurement.

Norm Keller
Posts: 712
Joined: Thu Apr 01, 2004 7:48 am

aftermarket exhaust results

Post by Norm Keller » Sun Dec 14, 2014 6:50 pm

Thanks for the additional detail, Stu. If you ever have the yen to stick the old one back for a comparison, please have me on the list. Plugged and restricted exhausts happen on other vehicles so not surprising to hear that one may have happened on a KLR. The being parked for 3 years might be the issue as have seen some other muffler issues of that sort. I think they were ones with higher miles which had some oil using issues and speculate that the deposits may have swelled due to moisture while stored. ------ Original Message ------ From: "Stu" To: "DSN KLR650" DSN_KLR650@yahoogroups.com>; "Norm Keller" Sent: 2014-12-14 4:23:47 PM Subject: Re: [DSN_KLR650] Re: Aftermarket exhaust results
> >Hey all, > >No quantitative metrics - >but before the exhaust, the old girl had nothing below 3k rpm and ran >out of breath at anything over 4k. > >Now, I can be cruising at 2500 rpm and give her gas to climb a good >hill w/o having to downshift. > >I'm not saying this is the panacea for all, but I don't think Sheila >was even doing stock numbers before. Now, doing the same roads I take >all of the time, she is peppier, and doesn't seem to stutter and >stumble. > > A 12 year old bike with less than 7000 miles that sat for 3 years is a >good candidate for a clogged exhaust is all I was thinking and rather >than replace with an OEM, I went with lighter. > >Of course there are folks out there who have dyno'ed and swear they can >document results of rejetting, after market exhaust systems, 685 ++ >kits, Mikuni carbs etc... They may have all worked for the representing >product too. > >In my experience racing sports cars though (many years ago), a tuned >exhaust was and still is cheap bolt on performance. Maybe because the >KLR is so simple, it is almost moot - just a pipe with one major bend >and one minor bend. > >As I said, I probably would not have changed mine except that the old >girl was not running the way she should have been running. The shiny >metal even looks a little out of place, but I sure am enjoying riding >her more. And her snarl is not like my old 650 Triumph Bonneville but >she has certainly found her voice. > >Not to trying to be adversarial - I certainly don't know these bikes as >well as most of ya'll - yet, but I do think each case can stand on its >own sometimes. > >I wish I had some way I could have documented before and after just out >of curiosity. > >Stu > > >----- Original Message ----- >From: "'Norm Keller' normkel32@... [DSN_KLR650]" >DSN_KLR650@yahoogroups.com> >To: "DSN KLR650" DSN_KLR650@yahoogroups.com> >Sent: Sunday, December 14, 2014 12:32:02 PM >Subject: [DSN_KLR650] Re: Aftermarket exhaust results > > > > > > > >Are you able to do some quantitative comparisons before versus after >your exhaust replacement? > >When we have done this, using 3rd gear roll ons, the stock system has >always won out, but I continue to hope that some exhaust system may >produce significant gain without excessive noise. This has not been the >case, in fact the reverse in both power and noise, IME. That includes >rejetting both before and after. If one compares a stock bike with one >having an aftermarket exhaust + air box and rejetting, this is not a >useful comparison, IMO. To have a useful comparison, one must rejet the >stock one, then compare, replace the exhaust + rejet as required, then >compare. > >Few of us are free of fulfilling our preconceptions and these shape our >impressions to a remarkable degree. If there are those who are free of >this, I am not one of their number so require measurement. > > > > >

landsail
Posts: 19
Joined: Sat Aug 22, 2009 10:32 pm

aftermarket exhaust results

Post by landsail » Mon Dec 15, 2014 8:46 am

Yes, with my Laser Duo Pro exhaust with a quieter baffle and the air box/rejet mid, roll-on with several stock KLRs reveals better and smoother acceleration and ride ability. Nothing major, but noticeable. The weight savings is substantial and no tweety sound. If needed, I can create a sound file or You Tube video . Mark

mark ward
Posts: 1027
Joined: Fri Jan 15, 2010 11:18 am

aftermarket exhaust results

Post by mark ward » Mon Dec 15, 2014 10:24 am

What do you call Substantial Weight loss? I read a few pages that show Just 4 lbs. If, stripping down a bike to race,yes it all adds up, but $400-$500 or a little "gain" & just 4 lbs, Sounds more like a Farkle.(Farkle is something JUST FOR, looks & fun, sound, etc. (stickers, different color Fork shields.)   & yes I have a few FARKLES, and some things for My needs. So not, being Negative just asking How much weight loss to dollar ratio? On Monday, December 15, 2014 9:46 AM, "landsail@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> wrote:
  Yes, with my Laser Duo Pro exhaust with a quieter baffle and the air box/rejet mid, roll-on with several stock KLRs reveals better and smoother acceleration and ride ability. Nothing major, but noticeable. The weight savings is substantial and no tweety sound. If needed, I can create a sound file or You Tube video . 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Glenn Sturley
Posts: 19
Joined: Fri Apr 20, 2012 5:08 pm

aftermarket exhaust results

Post by Glenn Sturley » Mon Dec 15, 2014 3:54 pm

I recently replaced my 4 year old lead acid battery with a Lithium variety. Cost of the new battery was AU$180, weight saving was 3.5lbs. Whilst not a large weight it now means that I can carry my Tyrepliers puncture/tyre removal kit and have the same weight as I started with but the added safety net of having equipment to fix things on any trip. Referrring to FARKLES, I was led to believe it meant functional sparkles ie : - devices that enhance the functionality and add some aesthetically pleasing device to improve your machine. I have lots on my bike and love them all, even though it looks like a hack! 2002 KLR650C now with 60000kms.   Merry Xmas to everyone.   Cheers Glenn  
----- Original Message ----- [b]From:[/b] nomad59@... [DSN_KLR650] [b]To:[/b] DSN_KLR650@yahoogroups.com ; landsail@... [b]Sent:[/b] Tuesday, December 16, 2014 3:24 AM [b]Subject:[/b] Re: [DSN_KLR650] Re: Aftermarket exhaust results   What do you call Substantial Weight loss? I read a few pages that show Just 4 lbs. If, stripping down a bike to race,yes it all adds up, but $400-$500 or a little "gain" & just 4 lbs, Sounds more like a Farkle. (Farkle is something JUST FOR, looks & fun, sound, etc. (stickers, different color Fork shields.)   & yes I have a few FARKLES, and some things for My needs. So not, being Negative just asking How much weight loss to dollar ratio? On Monday, December 15, 2014 9:46 AM, "landsail@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> wrote:   Yes, with my Laser Duo Pro exhaust with a quieter baffle and the air box/rejet mid, roll-on with several stock KLRs reveals better and smoother acceleration and ride ability. Nothing major, but noticeable. The weight savings is substantial and no tweety sound. If needed, I can create a sound file or You Tube video . Mark
No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4253/8738 - Release Date: 12/14/14

John Biccum
Posts: 542
Joined: Tue May 20, 2003 4:21 am

aftermarket exhaust results

Post by John Biccum » Mon Dec 15, 2014 6:01 pm

Reminds me of bicyclists that pay a  hundred dollars to save 20 grams of weight on their bicycle when THEY should lose 10 or 20 kilograms. From: DSN_KLR650@yahoogroups.com Sent: 12/ 15/ 2014 8:24 AM To: DSN_KLR650@yahoogroups.com; landsail@... Subject: Re: [DSN_KLR650] Re: Aftermarket exhaust results   What do you call Substantial Weight loss? I read a few pages that show Just 4 lbs. If, stripping down a bike to race,yes it all adds up, but $400-$500 or a little "gain" & just 4 lbs, Sounds more like a Farkle.(Farkle is something JUST FOR, looks & fun, sound, etc. (stickers, different color Fork shields.)   & yes I have a few FARKLES, and some things for My needs. So not, being Negative just asking How much weight loss to dollar ratio? On Monday, December 15, 2014 9:46 AM, "landsail@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> wrote:
  Yes, with my Laser Duo Pro exhaust with a quieter baffle and the air box/rejet mid, roll-on with several stock KLRs reveals better and smoother acceleration and ride ability. Nothing major, but noticeable. The weight savings is substantial and no tweety sound. If needed, I can create a sound file or You Tube video . Mark

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John Biccum
Posts: 542
Joined: Tue May 20, 2003 4:21 am

the 12 klr days of christmas

Post by John Biccum » Wed Dec 17, 2014 12:11 pm

5 miles of sand? That's *NOT* what I'd wish my fellow KLRistas! Last time thru the White Rim Trail I think we did more KLR-righting in the five miles of sand than we did on the rest of the 125 mile loop. I do love my KLRs but not so much when riding sand! On 12/16/2014 21:59, 'Ateam' ateam@... [DSN_KLR650] wrote:
Now I have that going through my head now. Brilliant! Ateam [b]From:[/b] DSN_KLR650@yahoogroups.com [b]Sent:[/b] Tuesday, December 16, 2014 8:44 PM [b]To:[/b] dsn_klr650@yahoogroups.com [b]Subject:[/b] [DSN_KLR650] The 12 KLR days of Christmas The 12 KLR Days of Christmas..... On the 12 th day of Christmas my KLR gave to me - Twelve months of riding, Eleven mountain passes, Ten water crossings, Nine muddy bogs, Eight hill climbs, Seven hours lost, Six dead end roads, FIVE MILES OF SAND. Four hours of blacktop Three quarts of Rotella Two panniers And a new FARKLE under the tree. STOLEN From the Kawasaki KLR 650 Owners. Face Book group LOL

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