With the cooler weather, riding my plated WR426 on the street really cools her down too much. My Trailtech Vapor is reporting consistent engine temps of 110-130 degrees on the street because of the cooler temps and lots of airflow. I only run Yamahalube semi-synthetic 10W-50 in the bike and change it often. Will it cause harm to the engine to run it at such low operating temps? It's too bad there isn't a thermostat on this thing to regulate coolant flow. 2nd question: Is a 10W-30 or 10W-40 any better at lower temps than the 10W-50 or are will they all behave as a 10W oil at those lower temps?