Gas in the oil?????

5 replies to this topic
  • cdonowho

Posted April 03, 2005 - 01:01 PM


Went for a short ride yesterday in some slow rocky stuff. Slow enough that she got a little warm. (I have an oversize Acerbis tank which I believe is restricting the airflow a bit) The engine started making a strange sound so I shut it off. I let it cool about 15 min and then restarted. Sounds / runs normal. When I checked the oil it definitely has gas in it. Any ideas? I've done all the standard mods. Bike has 6 miles on it.


  • ARSarizona

Posted April 03, 2005 - 06:22 PM


Check the float level in the carb and make sure the float needle is seating properly. I had a DR 350 drain half a tank of gas into the crank case because of a bad o ring that the float needle seats against. Also, make sure you turn the tank fuel valve to the off position when ever the bike is not running.

  • farkawi

Posted April 04, 2005 - 07:48 AM


ARSaz is correct. There are only two places fuel flow can be stopped. The petcock and the needle/seat. Dirt bikes regularly collect all manner of crud in the fuel system. Doesn't take much to make the needle/seat malfunction.

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  • cdonowho

Posted April 05, 2005 - 05:54 PM


Thanks guys. I dropped the float and made sure it was everthing was clean. I did notice some small pieces of black crud in the bottom of the bowl. I have a bad habit of leaving the fuel on and a piece of it must have stuck under the needle. Seems like I should have ended up with gas all over my garage floor instead of in the crankcase though. :naughty: Either way, I'll be turning off the fuel valve from now on. :naughty:

  • Gadsen

Posted April 05, 2005 - 06:31 PM


I assume you have drained all the oil/gas and replaced it with oil :naughty:

  • cdonowho

Posted April 06, 2005 - 09:59 AM


Yes, I actually changed it twice (with a 10 min ride in between) just to make sure I got all the diluted oil out. :naughty:


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