I had the same thing happen Saturday. Mickey with Four stroke tech answered my concern about a blown engine. Check inside your air breather and look in your carbs to see if there is any oil in there. He emailed me a fix that should take care of it. PM him and I am sure he would help. I had oil dripping out of both cylinders in the exhaust and had lost about a quart of oil. Cleaned everything best I could and ran it Sunday until all the oil was burnt out of the exhaust. This seems to be a problem with the 750s. Mickey said it wouldn't hurt anything.
When mine did it, I was on full throttle and went over a hump when it sucked the oil up into the carbs. FYI

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O8 Camo LE Teryx, Fundy Standard Bore kit, Dyna Tek CDI, dual HMF, Jensen Heavy Duty Radio, Hunterworks carb kit and filter, 14" ITP SS 212, 26" Bighorns and Custom front bumper.