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Old 01-19-2014, 08:31 PM   #1
celticpride2133 OP
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KLR 650 carb Help!

I cleaned my carb today as my bike would only idle with the choke on half way. Now that the carb is clean I start up the bike and it idles with no choke at around 1500, but any throttle causes it to stall immediately. Any thoughts? thank you
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Old 01-19-2014, 11:45 PM   #2
XDragRacer
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Quote:
Originally Posted by celticpride2133 View Post
I cleaned my carb today as my bike would only idle with the choke on half way. Now that the carb is clean I start up the bike and it idles with no choke at around 1500, but any throttle causes it to stall immediately. Any thoughts? thank you
My suggestion; re-check your diaphragm seal; could be a diaphragm air leak. Besides being fully intact (no fabric holes or tears), the diaphragm perimeter must fit inside its groove in the carb body casting, creating an air-tight seal, for proper carb functioning. Some use a dab of grease or silicone goop to hold the diaphragm lip in place while the mixing chamber cover is installed and its four machine screws tightened.

Make sure slide spring and its seat are correctly installed.

Check to see needle jet and its holder, etc., are all in their proper places.

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Old 01-19-2014, 11:50 PM   #3
Nanuq
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I had a similar issue and bad /greasy gas gummed up the strainer on the petcock screen inside my tank.
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Old 01-20-2014, 05:15 PM   #4
XDragRacer
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Well, celticpride2133, since advice offered by Nanuq and me hasn't been complemented or corrected, I'll consider this situation a favorable "peer review!"

How are things going; got 'er running right by now?
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Old 01-20-2014, 08:20 PM   #5
DirtyDog
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My thought was diaphragm as well, but never experiencing this personally, I let it stew a while. Glad to hear my gut is functioning properly.
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Old 01-24-2014, 05:51 PM   #6
celticpride2133 OP
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Still not running, but I just broke the fuel intake elbow part so now I'm waiting on that!
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Old 01-24-2014, 06:25 PM   #7
Keithert
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My Vulcan uses a similar carb. I swapped the carb needle recently and am having the same symptom. If I roll on the throttle gently it will die. If I grab and handful of throttle it will rev normally. Can you check if yours runs if you give it greater amounts of throttle?

I'll have to recheck the seal of my diaghpram. It looked okay when I put the cover back on though. I went from an aftermarket needle to a stock needle. The stock needle is less tapered than the aftermarket. I've been thinking that the wider needle was causing the bike to die.
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Old 01-24-2014, 06:40 PM   #8
iyaoyas98
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Carbs.

It's always the pilot jet.
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Old 01-24-2014, 07:42 PM   #9
XDragRacer
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Originally Posted by iyaoyas98 View Post
Carbs.

It's always the pilot jet.
The same diagnosis crossed my mind, but . . . the OP said he had just cleaned the carb. Then, again . . . the level of detail of the cleaning wasn't given.

Further, he says the bike idles (at 1500 rpm). With a clogged pilot jet, might not idle at all.
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Old 01-24-2014, 11:57 PM   #10
Tinker1980
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Make sure the vacuum petcock is operating properly. Mine (On my 2008 KLR) used to stop letting fuel through occasionally. Bike would fall on it's face, buck and toss, then (Sometimes) clear up and be fine. I took the vacuum part out of the stock petcock and made it manual and it never gave me that problem again.
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Old 01-26-2014, 04:46 PM   #11
celticpride2133 OP
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I just want to ask before I start buying new parts.

fuel mixture screw = 2 turns out

pilot jet = 2 turns out

main jet = all the way down

the carb has a klx needle, snorkel is gone and im at 5000 ft elevation

does all that "jaz" or am i needed to change something their before I begin replacing parts.

thank you
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Old 01-26-2014, 07:05 PM   #12
XDragRacer
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Originally Posted by celticpride2133 View Post
pilot jet = 2 turns out

main jet = all the way down
I think the pilot jet fits, "all the way down" also.

I commend this video clip to you for carb disassembly/overhaul (part 2 of 3 or 4):

http://www.youtube.com/watch?v=NKXQ4EJnya0

My suggestion, watch this video clip:

http://www.youtube.com/watch?v=rUrWNugrsrs

Ask yourself, "Did I lose the needle jet?"

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Old 01-26-2014, 08:26 PM   #13
Beezer
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pilot jet is "fixed".... screw it in all the way. the mixture screw only helps on the bottom end... turning it out makes it richer (sounds like what you need)... after 4 turns you get no more effect

with a klx needle you reduce the main jet size (it doesn't affect the idle though). Dynojet numbers are different from Kehin, don't mix them

it sounds like you are lean in the low range (at least). things that cause that are air leaks, restricted fuel flow, low fuel height (float setting), plugged idle jet, wrong jet. at your altitude I would think you would be rich.

cvk40s on Harleys and some other bikes have an accelerator pump that shoots in extra fuel when you crank the throttle. the klr version does not have that

hers good info:

http://www.gadgetjq.com/keihin_carb.htm
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