Question about kawasaki KX 250 Motorcycles

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Kx250 gearbox/drianplug leaking

Im a new offroader, i put 15w-40 in my gearbox when changing the oil, it starts and runs but its leaking oil. lightly when the engines off and when im throttling it it cumming out heavier, like theres comprestion in the gear box. when i throttle hard, the oil leak is frothy!!! i dont know if its my drain plug or where the oils leaking??? can you help? thanks, Donny.

Posted by donny07 on

  • Anonymous May 11, 2010

    is it pooling on top of the gear box or just coming out the over flow tube, also i hope you used a motorcycle oil because car oil and motorcycle oil are completely different , in a car your oil can be a slick as they can make it but in a bike or atv the oil is also used to work the clutch which in turn the oil has friction mod. in it but all in all you should have a sight glass on the right side of the bike around the bottom just under the kick start, make sure with some one holding the bike straight up and level that the oil is is in between the 2 marks on the sight glass if this is not the case go back to the dealership an see if they can order some die that you can put in the gear box to find the leak and also pick up a couple more cans of oil to flush and refill the gear box.



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There is pressure in the crankcase when the engine is running and when you rev it up this pressure increases. Oil pressure inceases with RPM and yes the oil will get frothy under pressure.

If you suspect the drain plug is leaking then remove the plug and wrap the threads with teflon tape and reinstall the plug, this should prevent the plug from leaking.

Posted on Jun 07, 2009


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14 to 104 degrees F 20W-50
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The Engine oil capacity on the VL 800 is:

3.2 U.S. Quarts (3000 ml) without a filter change

3.6 U.S. Quarts (3400 ml) with a filter change.

You are going to need a motorcycle lifting jack stand or similar device to properly accomplish the oil change. Before you start, locate the oil filter on the front side of the engine, between the engine block and the radiator. Read and copy down the number on the filter. The OEM filter is a Suzuki 16510-03G00-X07, I think.

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There are a number of different places that will accept waste oil for recycling.

God bless and good luck!

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