Carb on KLR 250 - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 19 Old 03-31-2015, 04:14 PM Thread Starter
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Carb on KLR 250

I have been watching the videos that Tom Schmitz posted and they are good but I have one question. There is a pressed in jet that I cannot get clean. Has anyone cane up with a way to get it out so it can be cleaned?

Thanks Dannie

P. S. Seems like I am in the KLR business lately, not really I have a friend that has two 650s and a 250 and dose not like to work on them.
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post #2 of 19 Old 03-31-2015, 05:14 PM
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Dannie -

Which jet is it, where is it, and what is making it dirty?

I'm not intimately familiar with the KLR250 carburetor. My first suggestion would be to give it a good soak in Pine-Sol. Without knowing more about this jet, though, I hesitate to make any suggestions on getting it out or what to clean it with.

Tom

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post #3 of 19 Old 03-31-2015, 05:42 PM Thread Starter
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The carb looks like the one in your videos at least where the jets are. I got the jets out that you talked about but there is a small brass jet on the other post that looks pressed in ( not sure what the name of that jet is). I can see a very small hole down in it but can't get any air or spray cleaner past it so I know it is clogged up.
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post #4 of 19 Old 03-31-2015, 06:39 PM
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Dannie -

Is it the one labled "Starter Jet" in this picture?



If not, is it somewhere else in this picture?

Tom

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“On the way downtown I stopped at a bar and had a couple of double Scotches. They didn't do me any good. All they did was make me think of Silver-Wig, and I never saw her again.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte

Sting like a butterfly.
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post #5 of 19 Old 03-31-2015, 06:51 PM Thread Starter
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Yes, that is it.
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post #6 of 19 Old 03-31-2015, 07:50 PM
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That should be clear up through the "choke" area where the plastic nut screws in.

I will pull down a carb and see what I can see. I can't think of a reason for that jet or passage to clog with anything.

Tom

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“On the way downtown I stopped at a bar and had a couple of double Scotches. They didn't do me any good. All they did was make me think of Silver-Wig, and I never saw her again.” -Philip Marlowe

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post #7 of 19 Old 03-31-2015, 08:26 PM
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Dannie -

It's what I thought - you won't be able to pass anything except air or fluid all the way through the passage.

If you look at the picture above, the passage goes down through the jet for about an inch, then takes a sharp turn to the lower left corner, then runs up the side of the carb to the top, where it does a U-turn and comes out the top of the enricher ("choke") cavity.

You can pass a bit of monofilament of about 4 lb test through the jet, though, and it should go down about an inch and a half before the passage makes it's turn. You will have to cut the end of the monofilament off cleanly; if you bite it off the end will be too wide to go through the jet. If you need to poke at the jet a bit, try a strand of copper wire.

It must pass air/fluid or your enricher won't work. Try taking a can of WD-40 with it's red straw (or whatever you have that has a red straw) and hold it tightly against the jet. Give it a good squirt and see if stuff comes out of the enricher cavity.

If it doesn't then you'll need to try a soak in carb cleaner.

Again, though, I can't think of anything that will clog that passage.

Tom

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“On the way downtown I stopped at a bar and had a couple of double Scotches. They didn't do me any good. All they did was make me think of Silver-Wig, and I never saw her again.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte

Sting like a butterfly.
Noli Timere Messorem

Last edited by Tom Schmitz; 03-31-2015 at 08:29 PM.
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post #8 of 19 Old 03-31-2015, 08:57 PM Thread Starter
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Thanks, Tom I will keep at it. I have some Pine-Sol so I will soak it in that. I will also try the copper wire and fishing line.
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post #9 of 19 Old 04-01-2015, 10:26 AM
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High pressure shop air is very effective in moving "stuff" from carb passages. Sometimes putting a bit of the cleaner into the passage, then blowing that through with shop air will work well because of the resistance provided by the liquid. The nearest KLR250 carbs are at a friends' in Washington so not much help in detail. There won't be anything to add onto what Tom observes regardless.

In extreme cases I have drilled out the gallery plugs of idle circuits to gain access and rod out the crud. I don't recall the starting enrichment passages being too badly blocked to clean, likely because the passages are larger. Hope you're successful. My ultrasonic cleaner has been quite helpful so might be an option....
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post #10 of 19 Old 04-04-2015, 11:45 AM Thread Starter
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Well I got that jet cleaned out. I had to let it soak in Pine Sol for a few days now just need to check float height. Is it the same as the 650 at 17.50 mm?

Thanks for the help Dannie.
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