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Old 09-24-2012, 05:46 PM
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Default 2002 xr200r won't idle

     

Hey guys, I have an xr200r 2002, I replaced the cam chain, tensioner, guide, and cam chain it's self. I did all the work then set the timing and put everything back in. But now the bike won't idle. I have taken all the jets out of the carb and cleaned them, cleaned the carb itself, and replaced all the seals in the carb. At the top of the engine along the top end seam on the exhaust side oil seeps out while its running. When running, I can hold it at a nice idle with the throttle, and when running, sometimes it runs through all the gears perfect and runs great and othertimes it Boggs down when given throttle. I have also replaced the air filter, I don't know what's left to do!! Please help! Maybe I am not tuning the carb right? Maybe it's the top end seal? I am out of ideas!

Thanks!
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Old 09-24-2012, 08:09 PM
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Ok, I know you said you cleaned the carb and jets, but I have found that most carb cleaners can't cut the crap deposited by our current "E" fuels in our carb jets. The pilot jet must be cleaned with a welders tip cleaner(wire) the break up the crap.
The other possibilities are a bad air leak at carb boot or intake or incorrectly set intake valves.

Paw Paw
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Old 09-24-2012, 08:40 PM
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Like paw said, probably the pilot. I just had a customer with an XR bring a bike by. Said he cleaned the carb and same thing. The Pilot wasn't clean
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Old 09-27-2012, 04:56 PM
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I did actually clean the jets, I took them all out individually and cleaned the crystallization out of them with an E string from a guitar. I do have a welding tip file set I can try, but the string seemed to open them right up. If its not the jets being clogged could it be the adjustments/specs as far as how far in it goes? Would a clogged jet cause bogging when given throttle too? Also when I take the spark plug out it is solid black
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Old 09-27-2012, 05:52 PM
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OK, so what is the fuel screw set at? It's the one under the front of the carb.
What condition were the valves in when you did the work?
Have you checked the float height? Can cause flooding and thus a black spark plug.
Have you done a compression test? What was the reading?

Paw Paw
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Old 09-28-2012, 06:51 AM
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I set the pilot screw at 1 1/2 turns out from lightly seated and have tried fiddling with that and the idle screw at the same time. The valves didn't look new but they didn't look bad at all. I haven't checked the float height, ill do that next. I only have a compression guage for a car, so it wont fit the bike. So the float height being too high would cause a rich mixture?
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Old 09-28-2012, 10:23 AM
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I dont think you will be able to get any kind of guitar string through a pilot jet. hard to get hair through some of them
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Old 09-29-2012, 09:36 AM
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Quote:
Originally Posted by ossagp View Post
I dont think you will be able to get any kind of guitar string through a pilot jet. hard to get hair through some of them
The e string of a guitar is 10 thousandths thick. And the average thickness of a human hair is about 4 thousandths. That's only a 6 thousandths difference. I think your referring to the wrong part.
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Old 09-29-2012, 01:45 PM
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Ok, so I adjusted the float, and now I can kick the bike into an idle with no throttle on and it will stay there great. But if I give it throttle it Boggs then gets stuck at a really high idle, then if I back the idle screw out it does nothing until...until it kills the engine, it's either high idle or off.
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Old 09-29-2012, 02:51 PM
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Ok, air leak or sticking carb slide/
Oh yes, the pilot center orfice is smaller than .004" in most cases.

Paw Paw
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Old 09-29-2012, 03:03 PM
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Quote:
Originally Posted by PawPaw View Post
Oh yes, the pilot center orfice is smaller than .004" in most cases.

Paw Paw
Then how do you get a welder's tip cleaner thru it?? For giggles I tried it yesterday and couldn't do it.
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Old 09-29-2012, 03:11 PM
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We may indeed be talking about a different part, but I know which one I am talking about if it is hard clogged with varnish, I would pay money to see you push any string through it too

But it is nice to know how thick an estring is, finally
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Old 10-02-2012, 06:48 PM
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It is pointless banter about the of the string and or the pilot jet center hole, due to the fact that the string went right through it no problem and cleared the hole. I will gladly post a picture of the string through the jet if you'd like


As far as the bike goes this is still the problem...

I can kick the bike into an idle with no throttle on and it will stay there great. But if I give it throttle it Boggs then gets stuck at a really high idle, then if I back the idle screw out it does nothing until...until it kills the engine, it's either high idle or off.
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Old 10-02-2012, 07:07 PM
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Oh heck that was no banter. Just a couple of facts. I know nothing of estrings at all. I do know that if you have a hard plug it is going to take something without any flex to push through it. Anyway I do know engines and how they are affected by airlesks and how to find them as we'll as a few other things that cause similar symptoms as you describe. I wont keep you any longer.
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Old 10-02-2012, 07:44 PM
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Would you care to share any of the other things that might cause these symptoms?

I did a basic check for airleaks with starter fluid on both sides of the boot and the carb conections to the boot and engine. But it didn't seem to show signs of any leaks from this test.
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Old 10-02-2012, 08:03 PM
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It is likely that there is an air leak, just curious, did the bike run fine before the work?
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Old 10-03-2012, 01:02 AM
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FYI spray tests never worked for me either.
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Old 10-03-2012, 07:09 AM
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Quote:
Originally Posted by stevo450 View Post
It is likely that there is an air leak, just curious, did the bike run fine before the work?
Well the bike ran haha the carb and everything worked fine there was a rapping everytime the piston would turn over, so I took it to a shop and they told me what was wrong, so I pulled the engine and did the work. All I did was take the carb off and put it back on so I am not sure how anything in the carb got messed up. I have the service manual and did all the work by the book. Do you know any other ways to check for air leaks.

@ossagp could you please help me solve the problem instead of bashing everything posted? You know way more about bikes than I do...which is why I joined this forum.
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Old 10-03-2012, 07:51 AM
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Ossa, you bully!!!
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Old 10-03-2012, 08:56 AM
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Did you ever check the slide for sticking or binding?
Have you lubed the cable?
Are you sure the cable is routed correctly and not binding?

Hanging idle can be caused by all of these items as well as an air leak, or dirty carb or pligged pilot jet.

You have been given may things to check, but after rereading all the post I don't see where many were tried or addressed, so I don't get you calling Oss out on this you have not done the work. The problem will not just go away until you invest the time to find and fix the issue. I don't know about anyone else, but I know I can't fix the problem from my keyboard.

Paw Paw
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