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catfish

Oil dripping from wr450 airbox?!?

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After a few hours of fast dual-sport riding, I find an oily front swingarm & trace the dripping from the airbox, which has a puddle in the bottom of it. &%$#@!?!? Anyone else seen this happen?

I checked the archives for "oil airbox" and there is nothing. Any clues would be appreciated.

Catfish ...

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You got water and oil mix in your air box. Just drain the air box and everything should be OK. Check that you dont have a leaky counter shaft sprocket seal.

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The fluid I drained from the bottom of the airbox was definitely a light-colored oil, and didn't *seem* to have any noticable amount of water in it. The wetness on the front/top of the swingarm was the same oil.

After cleaning everything up & doing a couple more long, hard DS rides, it has not repeated itself. I'm guessing now that it was my over-abundant air-filter oiling back in December, but it must take several days of riding before the excess finally worked its way to the bottom of the airbox & overflowed out the bottom of the opening for the sidecover. WOW that was a lot of oil though!!!

Catfish ...

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i think you will eventually find that the oil in your air box originated from your crank case vent hose , high rpm's can produce high crankcase pressure forcing oil vapour out the vent hose , it would be more likely to happen if you had over filled your crank case . does your vent hose run to the air box ?

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