Hey everyone, I got my daughter an '06 TTR 50. It ran great at first(and still does) but it puffs out a small amount of smoke when she rides it. I've changed the oil and checked the compression(it slowly bumps up to 150 psi after about 5 seconds of turning it over with the electric start). At first I thought it could be old oil so I changed the oil, put fresh gas and it still smoked. I thought it could be the rings but with 150 psi of compression it doesn't seem like that would be the culprit. Any suggestions on what it could be? She rides it every now and then and the last time I checked the oil after she rode it and it was low. Some people say they just ride it with it smoking but I'd rather not lose track of the oil level and blow it up. I've adjusted the valves as well. Could the valves need to be lapped? Or maybe the rings are just bad and it needs new rings? Just trying to get some advice before I order a rebuild kit and just rebuild the top end. It's a great running bike and she loves it so I'm trying to keep it in top shape and not have to worry about it. Thanks in advance and sorry for the long post.