Question about 1998 Honda XR 250 R

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I have an 1998 xr250. it ran great and very strong up till today when i decided to clean the air filter (it was very dirty). after cleaning i put it in the bike to see how it ran. the bike would hardly start or run. i played around with the jets to get the right gas/air mixture, but still the bike wont start. any suggestions?

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There are two causes of your problem that I can think of: firstly, it may be that you, even after changing some jets, haven't got the air/fuel mixture right. If i were you, I'd put the standart jets back in, set the needle position to the middle position, and screw the air/fuel mixture screw 2,5 rotations ( 900 degrees) out from fully screwed in. This should return your bike's mixture settings to approximately standart. Then, using this page http://www.dansmc.com/spark_plugs/spark_plugs_catalog.html
determine if you have a rich or a lean mixture, and adjust accordingly. If you have any more questions, or would like me to clarify something, please ask.

Posted on Jun 20, 2009

  • feralcrew Jun 20, 2009

    Oh, and secondly, after you cleaned the air filter, there may be an air leak somewhere, which makes your mixture so lean to the point where it won't start. So, just check for air leaks in the air filters joining point to the manifold, on the manifold itself.

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