Question about 2003 kawasaki KDX 220 R

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Excessive oil from muffler

My son has a 2003 kdx and after riding, he get's a lot of oil that runs down the bottom of his muffler and will actually drip.we use a 40:1 gas mixture so is this normal or should we change something. or do we have a bigger problem?

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Unburnt oil will cause this issue that you have, on my old wr250 this was the case, get the carb mixture set properly for the oil gas and air. clean the piston and the spark from carbon deposits. do this and you will even get more power out of your 2 stroker.

Posted on Sep 07, 2009

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Thats not likely. What you are seeing is excess oil from you gas and oil mixture. Not sure if your still running the oil injection pump but it sounds like you have been running a very rich oil/fuel mixture.
The gearbox oil is not accessible through the crankcase. They a totally separate sealed sections of the motor. If by chance you are losing gearbox oil your bike will billow a very white disgusting smelly cloud of smoke. If that is what is happening you may have a right side crank seal blown which will allow the oil to be sucked from the gearbox into the crankcase. Hopefully this is not the problem because with your model I'm 85% certain you will have to split the cases to replace the main seal on the right side engine center case. If thats the case I'd highly recommend you replace both right and left main seals as well as main bearings.
You will need some special tools to do this job. I can tell you what you need to do the job and if you like to DIY I can tell you how to do it and what to look out for.
Best of luck.

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