Question about 1998 Honda XR 400R

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Immediate overheating... with in 1 to 2 minutes of warm up... bad enough to make the header pipe glow red.

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It sounds like the fuel mixture is running extremely lean for some reason. Disassemble the carb and clean out the jets. Inspect any rubber parts between the carb and the intake. Make sure the intake manifold doesn't have an air leak.

Posted on Oct 08, 2009

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that can not actually on the battery, check cooling water, oil check ...
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of air filters has not hurt the testing pass muster(has not distoid this).
diagnostics for a better one, we need more information.
nice greetings from Germany

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2 Answers

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The header pipe will glow red when you run it on choke, during warm up. This is normal while sitting. You shouldn't see that one you start riding it though.
The coolant drip could be just a dirty or failing radiator cap. My bike will push a little out if I completely top it off full. Hope this helps.

Jun 20, 2009 | 2003 Yamaha YZ 450 F

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