[cgtech]

It is not unheard of in my experience to see a old yamaha that consumes oil, while having fine compression / power. The oil control rings get gummed up. You can try "yamaha ring-free" treatment, but, it usually only lessens the smoke once it is at the point you are at. I use the treatment every few oil changes to try and prevent this condition on mine. A few years back, i was given a G2 that smoked like a chimney, i ran the treatment on it, it helped some. That cart still runs just fine today, and still uses oil to this day.