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Why is my exhaust pissing oil?

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Today was the first time my bike has been started in a while after I had the motor out. And now when I start it oil is covering the front of my motor by the flange. Any help?ImageUploadedByThumper Talk1399160485.213034.jpg

It is a 2000 cr125

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When was the last time you rebuilt the top end? What kind of compression do you have ? If thats all good check the right side crankshaft seal. Mine done this on my 05 cr 250 spraying out of the pipe ,the collar was worn on the right crankshaft journal and wouldn't seal , sucking transmission oil into the cylinder . 

IMG_1745.JPG

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Replace the o-ring, your bike may be running rich aswell. id suggest a carb clean out/ proper re-jet. a new spark plug too.

 

Check your compression, a good reading is over 125psi

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