Maintenance & Technical > KX500 Original

OIL MIXTURE

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monster malibu:
Hey guys, I was wondering what rate you mix your gas/oil. I was told to run my bike at 32/1, does this sound right? Should my mixture be closer to 50/1? I mixed the first 2 gallons over 32/1 because it's got a new piston. 

alan:
You may want to read these posts!
http://www.kxriders.com/forums/index.php/topic,1347.0.html

You will find that the answer is anywhere form 32:1 to 100:1 and everywhere in-between!
It depends on the type of oil and how brave you are! I have been using Kawie Kem at 40:1 for years and I bought some Amsoil  that claims I should mix it at 100:1 and I haven't been brave enough to try it yet!

 :-D :-D :-D :-D :-D :-D

moreccsthanlbs:
when i bought my 500(new sept.99), i ran 32:1 and fouled plugs like crazy. now i run motul 800 @ 40:1 and haven't had any problems. i run my bike hard in the deserts of so cal, and i'm still on my stock piston and rings. pulled the cylinder off this summer, just to have a look, everything still looked good. my motto...if it ain't broke, don't fix it. like the above thread said, you'll be told everything from 32:1 to 100:1. just my 2 cents, 40:1 with a quality oil and you'll be fine....the 500 is a bullet-proof motor.

kaw rider:
it's your fuel mixture that doing it. not your oil mixture. i run my at 24:1. no oil dripping from exhaust. i will be going lower then that.

FactoryPhil:

--- Quote from: moreccsthanlbs on September 09, 2007, 06:02:12 AM --- my motto...if it ain't broke, don't fix it. like the above thread said, you'll be told everything from 32:1 to 100:1. just my 2 cents, 40:1 with a quality oil and you'll be fine....the 500 is a bullet-proof motor.

--- End quote ---

I agree. I recommend to all my customers at my shop to try 40:1 if they are fouling plugs. To go any leaner on the oil than that is really unnecessary. Spark plug selection also helps greatly. The racing plugs that are so expensive i.e. the GV and GVX plugs, have a finer center electrode that the spark is coming from. The finer electrode with the same amount of juice running through it as a standard plug's electrode helps the firing area keep from fouling without having to change the heat range of the plug. Basically, I think the better plugs are worth the money.

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