About a month ago I noticed white smoke coming out of my motorcycle exhaust. Not constantly, but it would maybe start smoking and then stop after riding a little. Or maybe keep smoking even after riding for a while.
At first I thought it could be bad quality gas, since it has been only about 50k kilometers since the last time I had replaced the cylinder, piston and piston rings. I also couldn't notice any black residues on the end of the exhaust, which I heard gets deposited there when the engine is burning oil (is that right by the way?).
Today however, I noticed the first residues of black carbon. Very little, but first sign that it's probably oil being burned and not bad gas. The oil level is still within range, but getting slightly closer to the lower end. I'll be keeping an eye to the oil level even more frequently now.
Now to the question title. I first noticed the motorcycle smoking through the exhaust after I push started it when I had a dead battery and had to get it running. It could be a coincidence, but part of me is asking myself if that could have been the cause. Maybe the impact of the stationary transmission on the rotating engine could have broken or displaced a ring? Since 50k kilometers usually isn't enough to make a cylinder hear kit replacement necessary, I was wondering if I prematurely caused the damage.
The motorcycle is a 150cc Honda, if that's relevant!