Thanks for the post. You're right. The newer Tomos' had oil injection. My 88 Tomos is a regular ole Bullet. That year the oil injection was standard only in the upper end models. You put my mind at ease a little about the rings. I was talking about the gas/oil mixture (premix) in the tank. I don't know where (if any) an adjustment is on the fuel/air mixture. If you know that might help me. Thanks for the help and I'll check the plug.