Runs rough/stalls when warmed up. - Kawasaki KLR 650 Forum
KLR & Other Motorcycle Related Discussion Grab a seat and discuss whatever you like about the KLR or other related topics. Within reason.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 Old 08-04-2008, 04:33 PM Thread Starter
 
Join Date: Dec 2007
Posts: 4
Runs rough/stalls when warmed up.

Lately, after riding around a bit, the KLR's RPM's will drop a little, then if i twist the throttle, it dies. If i really crank the throttle, it will sputter and hesitate, then rev up. This has gotten to be a problem, as its died on me at green lights in the middle of busy intersections. This only happens when it warms up. If i let is sit, it will start back up and idle/ rev up no problem, then when I take it for a test run around the block, it dies again. Its an '03 i believe, and I already replaced the vacuum line to the carb, which was crimped, but that didnt solve the problem. Thanks in advance for any help!
Mugyver is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 08-04-2008, 07:17 PM
 
Join Date: Jun 2008
Posts: 15
I know this may sound crazy, but I had a similar problem. After much looking I discovered my enrichner cable (choke) was frayed internally. This was causing the carb to run rich because of sometimes partial engagement. The bike would flood, run awful and stall. Replaced the cable and problems solved. It's a long shot. Good luck, La mula verde, Katy Tx.
La mula verde is offline  
post #3 of 11 Old 08-05-2008, 02:01 PM Thread Starter
 
Join Date: Dec 2007
Posts: 4
Hmm somehow I don't think too much fuel is the problem, but thanks, I will definitely check that out. On second thought, it might make sense that instead of starving, the engine is flooding, causing it to die. That also might explain why after sitting, it starts right up. Man, hopefully that is the problem, because I'm running out of options, and am avoiding the dealer/mechanic at all cost. Any more ideas would be greatly appreciated!
Mugyver is offline  
 
post #4 of 11 Old 08-05-2008, 02:55 PM Thread Starter
 
Join Date: Dec 2007
Posts: 4
update: I inspected the choke cable, and it seems to work perfect, so I don't think that is the problem. I think it has to be something in the carb, or fuel system. Someone said it might be the valves, does that sound like a possibility?
Mugyver is offline  
post #5 of 11 Old 08-05-2008, 03:44 PM
4th Gear
 
DXKLR's Avatar
 
Join Date: May 2007
Location: Richmond, Ky
Posts: 1,980
It could be a few things or all combined.

Normally I don't think the valves needing adjusting will cause it to just die, the bike just tends to lose power and idle a little more erractically, due to the fact the valves are not closing completely and you have overlap with the intake and exhaust.
There is however a vent in the fuel tank lid, that has proven to sometimes cause a vacuum inside the tank not allowing enough fuel pressure to flow down into the carb. I have removed mine, mainly because mine made an awful hissing noise after I had ridden it, and this mod eliminates the vent hiss.
Another problem could be in regards to your vacuum hose that runs from the carb to the petcock. This hose draws vacuum when cranking and allows the diaphram in the petcock to open, thus allowing fuel to drain down the fuel line and into the carb. There is a mod that a few on here have done with great success. The diaphram is by-passed and essentially turns the petcock into a full time gravity fed point. By doing this mod, fuel is no longer restricted by vacuum and the rider must remember to manually shut the petcock off and not leave it in the on position. This will normally fix most issues of fuel starvation. I have the kit, but I have not done the mod yet. It is on my list of winter projects.

Some links of interest on this:
http://www.bigcee.com/petcock.html

http://www.klrforum.com/showthread.p...+tank+vent+mod

http://www.klrforum.com/showthread.p...+tank+vent+mod

2008 DL650 VStrom Yellow and Black
Previous ride was a 2007 KLR Black/Silver, I miss it..
Looking to get back into KLR's sometime soon.

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote

Last edited by DXKLR; 08-05-2008 at 04:14 PM.
DXKLR is offline  
post #6 of 11 Old 08-05-2008, 03:55 PM
4th Gear
 
DXKLR's Avatar
 
Join Date: May 2007
Location: Richmond, Ky
Posts: 1,980
Also meant to mention, that running some Seafoam thru the Carb might help clean out anything in there causing problems. About 1/2 a can with one gallon of gas, then the last half of the can with another gallon of gas. A couple of guys here did that with not much better results and they removed the float bowl to find a bunch of sand looking junk in the bowl which was causing a lot of problem with fuel delivery. A good carb cleaning might be in order also. If you do not know when the valves were last checked, I would definatetly want to check the valve lash.

2008 DL650 VStrom Yellow and Black
Previous ride was a 2007 KLR Black/Silver, I miss it..
Looking to get back into KLR's sometime soon.

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote
DXKLR is offline  
post #7 of 11 Old 08-20-2008, 08:29 PM Thread Starter
 
Join Date: Dec 2007
Posts: 4
Thanks alot for the input DXKLR, I'm quickly losing faith, and may break down and take it in, despite my extremely tight budget. I'm going to try to give the carb an extremely thorough clean, I'll try that seafoam stuff before I pull it. You run it through IN the bike right?
Mugyver is offline  
post #8 of 11 Old 08-20-2008, 08:31 PM
4th Gear
 
DXKLR's Avatar
 
Join Date: May 2007
Location: Richmond, Ky
Posts: 1,980
yes...Usually drain the tank down to a gallon, put half the can in. Run it till you hit reserve. Put another gallon and the last half of the can and run it till you hit reserve. By then if it is going to clear up it will. If not, then might have some larger stuff in there causing the problems that will require a more thorough cleaning. Berryman's is just as good as the Seafoam and about half the price. I use it myself, about once a month to keep everything clean and running good.

2008 DL650 VStrom Yellow and Black
Previous ride was a 2007 KLR Black/Silver, I miss it..
Looking to get back into KLR's sometime soon.

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote

Last edited by DXKLR; 08-20-2008 at 08:39 PM. Reason: Added Berryman's text.
DXKLR is offline  
post #9 of 11 Old 09-02-2008, 04:49 PM
 
Join Date: Sep 2008
Posts: 1
I've been having same problem with my 94 klr recently.when warmed up I have to keep the throttle held open to keep it from dying,the idle is also very eratic,sounds like the motor has a cam in it or something.power seems fine when I get going,maybee a bit off.Anyway I did just about everything to figure it out and I'm convinced now the valves out of adjustment.I'll let you know what happens after I check them.
astrosquid is offline  
post #10 of 11 Old 09-02-2008, 11:52 PM
3rd Gear
 
Paulo888's Avatar
 
Join Date: Feb 2008
Location: L.A. Native
Posts: 517
Fuel filter dirty? Clogged up? What the heck do I know.

94 KLR,tank guards,sw motech centerstand,Doo done, african switch,mirror dampners, powerpegz, twisted throttle fuses, aluminum skidplate, Bigcee shark disc and jug holder and subframe upgrade, progrip grips,maier handguards/brushguards, avon distanzias,fmf q4 exhaust, headlight guard, handlebar risers, billet rear brake reservoir bracket and guard, dual star shifter,garmin 2820 gps, tmod,disc cover, pcv mod,corbin flat
Paulo888 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KLR 650 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Stalls when put into gear Zonadoro 1987 to 2007 Wrenching & Mods 4 06-03-2008 02:14 PM
Bike only runs without gas line attached edcincy 1987 to 2007 Wrenching & Mods 3 07-08-2007 11:32 PM
Laptop on a rough ride? JAK HMR Bike and Rider Gear 1 06-01-2007 07:06 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome