backfire.......

[Tim Paulsel]

Wow, I have the same year and exact mods you do! I run 6 disks and 2 1/2 turns on the jet. My bike "backfires" on hard deacceleration, and always has since I added the Supertrapp. I wouldn't excatly call it a backfire though, just the sort of popping you'd expect from a 4 stoke that is opened up a bit.

----- Original Message ----- From: "Bill Whalen" To: DSN_KLR650@yahoogroups.com> Sent: Friday, April 01, 2005 5:26 PM Subject: [DSN_KLR650] RE:Backfiring > > My KLR has a Supertrapp Exhaust, K&N Air Filter, and Dynojet Kit. > > My bike was running fine uder 5000 rpm's, but over that it would miss badly > and could not go over 70-75. I removed the carb, took it apart carefully > (have done this about 4 other times with problem), cleaned it with carb > cleanier, and reassembled. > > The bike starts immediately, and pulls strong throughout all the gears to > redline without a hint of a miss. The two problems I have is that on > decelleration it backfires terrrible and it seems to be running slightly > hot. > > I have the thumb adjuster screw and it I put it at 2, 2 1/2, 3, 3 1/2, and 4 > turns and the bike seems to run the same and the backfire is the same. > > I also went from 6 disc's to 9 in the SuperTrapp if that makes a difference. > > Also, when the thumb screw is all the way in is it richer or leaner, I > thought that I red somewhere that it is the opposite of most carbs. > > Any help with be greatly appreciated. > > Bill "SandShark" > 92 KLR-650 > 03 V-Strom > > > > > Archive Quicksearch at: http://www.angelfire.com/ut/moab/klr650_data_search.html > List sponsored by Dual Sport News at: www.dualsportnews.com > List FAQ courtesy of Chris Krok at: www.bigcee.com/klr650faq.html > > > Yahoo! Groups Links > > > > > > >

[Jud Jones]

--- In DSN_KLR650@yahoogroups.com, "Bill Whalen" wrote:

> My KLR has a Supertrapp Exhaust, K&N Air Filter, and Dynojet Kit. > > My bike was running fine uder 5000 rpm's, but over that it would miss badly > and could not go over 70-75. I removed the carb, took it apart carefully > (have done this about 4 other times with problem), cleaned it with carb > cleanier, and reassembled. > > The bike starts immediately, and pulls strong throughout all the gears to > redline without a hint of a miss. The two problems I have is that on > decelleration it backfires terrrible and it seems to be running slightly > hot. > > I have the thumb adjuster screw and it I put it at 2, 2 1/2, 3, 3 1/2, and 4 > turns and the bike seems to run the same and the backfire is the same. > > I also went from 6 disc's to 9 in the SuperTrapp if that makes a difference. > > Also, when the thumb screw is all the way in is it richer or leaner, I > thought that I red somewhere that it is the opposite of most carbs. >

Adding those discs is going to lean out your mixture, perhaps quite a bit. At the upper range where you are experiencing trouble, the idle mixture screw won't have much effect. BTW, out is richer, in is leaner.

[markwhitegb]

Happy New Year to all, I have a stock Klr650 97 . Can somebody tell me how to stop the thing from backfiring!Thank you!

[Jeff Saline]

On Mon, 29 Dec 2008 22:45:39 -0000 "markwhitegb" writes:

> Happy New Year to all, > > I have a stock Klr650 97 . Can somebody tell me how to stop the > thing from backfiring!Thank > you!

<><><><><><><> <><><><><><><> Mark, Tell us what the conditions are when it backfires. Closed throttle deceleration. Opening the throttle under light load around 2,500 rpm or so... etc. Any mods to the fuel, exhaust or intake system would be helpful if you could share them too. You could have a leak allowing air (oxygen) into the exhaust system allowing unburnt fuel to ignite. You could have a leak at the intake causing a lean condition. Your valves could be tight with early opening and late closing. Your fuel mixture could be lean. Lots of possibilities so more info is needed to maybe point you in the correct direction for you to continue troubleshooting. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT ____________________________________________________________ Click here for free information on how to reduce your debt by filing for bankruptcy. http://thirdpartyoffers.juno.com/TGL2141/fc/PnY6rw22U5wsyDM2NfZJ3Bp6i4zCpBaBaeptuESm6kjKfpy8LmFEY/

[eddie mauri]

Seafoam! Add the recommended amount of Seafoam and bad-da-bing, no more ba-da-boom. I don't know why salty sea water works so well, but it does. I even use Seafoam in my coffee! My KLR had a backfire from sitting and Seafoam did the trick. You can get Seafoam at most any auto parts store. Plus it is the most easyfix, no need to do the carbs float, etc, I'd start with Seafoam. Eddie (03' KLR650 - "la poderosa") [Non-text portions of this message have been removed]

[fasteddiecopeman]

--- In DSN_KLR650@yahoogroups.com, "markwhitegb" wrote:

> > Happy New Year to all, > > > I have a stock Klr650 97 . Can somebody tell me how to stop the thing from backfiring!

Thank

> you! >

Don't start it! ; >) Ed - Happy New Year!

[SCOTT STABOLITO]

People so tend to complicate things by overlooking the easiest and the most obvious solutions the our problems! Good answer Mr. Copeman! HAPPY NEW YEAR AND SAFE RIDING TO ALL!!!!! [Non-text portions of this message have been removed]

[roncriswell@sbcglobal.net]

And most likely is an exhaust leak (at least it was on mine). Criswell

On Dec 31, 2008, at 6:59 AM, SCOTT STABOLITO wrote: > People so tend to complicate things by overlooking the easiest and > the most obvious solutions the our problems! Good answer Mr. Copeman! > HAPPY NEW YEAR AND SAFE RIDING TO ALL!!!!! > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed]

[Arden Kysely]

There are two places to look for this--where the header pipe exits the head, and where the header pipe meets the muffler section. At the head, there's a copper gasket that can be wrecked if you don't get the pipe into the head nice and flush. At the header/muffler joint there's a wire mesh/mystery material gasket that can wear away over time, especially if the bolt holding the pipe sections together isn't gudentite. __Arden --- In DSN_KLR650@yahoogroups.com, "roncriswell@..." wrote:

> > And most likely is an exhaust leak (at least it was on mine). > > Criswell > On Dec 31, 2008, at 6:59 AM, SCOTT STABOLITO wrote: > > > People so tend to complicate things by overlooking the easiest

and

> > the most obvious solutions the our problems! Good answer Mr.

Copeman!

> > HAPPY NEW YEAR AND SAFE RIDING TO ALL!!!!! > > > > [Non-text portions of this message have been removed] > > > > > > > > > > [Non-text portions of this message have been removed] >

[Jeff Khoury]

Kawasaki Automatic Compression Release KACR -Jeff Khoury From: "Flower Jamie" To: "DSN KLR650" DSN_KLR650@yahoogroups.com> Sent: Thursday, March 31, 2011 8:00:44 AM Subject: [DSN_KLR650] Re: Backfire....... "KAKR"? [Non-text portions of this message have been removed]