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Old 09-24-2012, 04:46 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, 07:09 PM
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Default OK

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, 07:40 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, 03:56 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, 04:52 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, 05:51 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, 09:23 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, 08:36 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, 12:45 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, 01:51 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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