Mechanic still has the machine. Still not right. They called kawasaki tech. Line,but still haven't received the correct fix. I still think it's a bad cam. I got 130 compression when I had it, but it wouldn't have it when it was supposed to. If it had of been my machine I would have opened the crankcase regardless. It belongs to a 90 yr old friend though. I personally dought it had that much carbon on the valves,but I don't call nobody a lie unless I am sure.If it had that much carbon, there is 100% a cause. Either the air filter is letting stuff by, it's running very rich, bad gas, burning oil. Either HG or bad rings. Or some combo of them.