Oily water coming out of pipe

Just fllushed my ski on the hose, and I've got a black rainbowy oily stain in my driveway from where it exited the pipe (B pipe, after market head).

Isn't this indicative of either a blown o-ring, or cracked dome? Both pissers are fine, but the ski has been bogging off idle after a few minutes of riding.
 

Waternut

Customizing addict
Location
Macon, GA
Remember the exhaust goes through that pipe and since it's a two stroke there is typically unburnt fuel that goes into the exhaust. It's probably a bit rich but if it runs good without any hesitations, I'd say leave it be.
 
Hmmm....just rebuilt the carbs in Feb, but the ski is running like crap. Everytime you crank a hard turn, and the engine revs a little higher than normal it bogs. Ride in a straight line and it runs fine; but as soon as that pump comes out of the water a bit.....back to full-on boggage.
 
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