I have a 2000 kawasaki 900 stx, and my friends took it out this past week over the forth of July. The problem was they were going as fast as they could with over 600 lbs. And the jet ski is registered for a max of ~500 lbs. I just came off the lake and realized the jet ski was smoking a lot more than normal. It did not have the power. And lastly when cold starting before getting in the water, oil was "spitting" out of my exhaust... I am not sure if this is a major issue, and was wondering if anyone knew something I could try/ do?