1985 Klr 600 problems - Kawasaki KLR 650 Forum
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post #1 of 7 Old 05-28-2015, 12:27 PM Thread Starter
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1985 Klr 600 problems

Just wondering if any of you could point me in the right direction. This video I included is the longest this bike will run. When its cold it will start.. run for a few seconds and die. After about 3 or so minutes of fighting it i can get it to start and run like you see in the video, it will run for about 20 seconds and die then it won't start at all. Even when its running it wont really let me rev up the motor

The head has been freshly machined. New piston rings. Checked the clearance on the valves. Has a new sparkplug. New top end gasket kit. Carb was cleaned and has fresh gas. The copper plug is still on the carbs air screw so i know the settings should be right.

It has a new timing chain and the timing lines on the cams match perfectly while at TDC


Last edited by Tom Schmitz; 05-28-2015 at 04:03 PM.
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post #2 of 7 Old 05-28-2015, 04:07 PM
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Have you checked that the petcock is giving you full flow? Sounds like it runs out of gas; perhaps there's only a trickle from the petcock. That would indicate a failure of the vacuum diaphragm on the backside of the petcock.

Pull the vacuum line off the pack side of the petcock and stick another vacuum hose on it.

Put a bit of fuel line on the petcock and run it into a measuring cup.

Apply vacuum to the vacuum line and see how much fuel comes out in 10 second or so. It should be a strong stream of fuel.

If that checks out then you might suspect that the carb's inlet valve is not opening fully, which could be a mis-adjusted float or a sticky valve.

Make sure the carb vent line is open, too.

Those are the simple things.

Tom

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post #3 of 7 Old 05-28-2015, 11:25 PM Thread Starter
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Thank you for your response!

the tank I had had rust in it. so what I did is I took a funnel and attach the fuel line to it and feeding the gas to the carburetor that way so I don't even have the petcock attached to the motorcycle. do you think the way I have it set up would cause that problem?

as you did point out it does look like its running out of gas maybe I will try putting the gas tank on with an inline filter and see what the bike does then! again thank you for the response!
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post #4 of 7 Old 05-28-2015, 11:59 PM
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Before doing that I would pull the bowl and see if the inlet valve is stuck.

Can you blow air through the carb vent?

Tom

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The kid poured him another straight rye and I think he doctored it with water down behind the bar because when he came up with it he looked as guilty as if he'd kicked his grandmother. -Philip Marlowe

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post #5 of 7 Old 05-29-2015, 08:26 AM
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Quote:
Originally Posted by trent109 View Post
Thank you for your response!

the tank I had had rust in it. so what I did is I took a funnel and attach the fuel line to it and feeding the gas to the carburetor that way so I don't even have the petcock attached to the motorcycle. do you think the way I have it set up would cause that problem?

as you did point out it does look like its running out of gas maybe I will try putting the gas tank on with an inline filter and see what the bike does then! again thank you for the response!
Did you plug the vacuum port that normally goes to the petcock?
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post #6 of 7 Old 06-10-2015, 04:44 PM
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Stock KL600 does not have the petcock vacuum set up. Try without the tank cap on tight, might be the cap vent is clogged. If you didn't remove idle mixture screw (cap still on) you didn't thoroughly clean carb.
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post #7 of 7 Old 06-11-2015, 11:02 AM Thread Starter
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Sorry i though i replied to this!

I got to looking online at other klr 600 carbs and the one i have, had a cap on 2 vents. One on the front and one on the side.. Well on the pictures i seen of people's carbs didnt have a cap on the side vent. I pulled the cap off and now she runs steady.

But now when i try to rev it up sometimes it spits a sputters! Im going to take the carb apart again and actually take the air valve out and clean it real good to see if that fixes my problem!
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