KX250Dad said:If the oil you refer to is greyish it can only come from coolant which can only enter the firing zone thru the head or cylinder base to crank...
Solid State... unfortunately I've had issues with my '05 YZ250 and water in the cylinder/crank. Wound up either a warped head or errosion/pitting at the top of the cylinder cloose enough to the inner o-ring seal. Suspected when at temp (under pressure) coolant leaked from the jacket into the cylinder. Used some plastic metal and imagination and appears to have worked. Given the nature of this issue please pass on other water in crank avenues... I'd owe you one.Solid State said:Not true. There are other ways that water can enter the combustion chamber on a YZ250
Pull the pipe and wash it out with diesel, then repack your silencer. Repacking the silencer is cheap, keeps performance up and noise down. Jetting is not difficult, just time consuming.76GMC1500 said:The spooge isn't necessarily an issue. It is my believe that if you have no oil carrying over into the exhaust, your powervalve is not properly lubricated. I like to see a little spooge at the end of the day. You probably need to repack your silencer, too.
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