Leave the cylinder one, and regulas admission and escape, the admission of the two and the escape of the three, so you only tour the crankshaft and regulate all the valves quickly as to the light I cannot help you do not know that information, but you can find it on the web, usually 15 and 20 or 20 and 25 in other brands, better do it before doing it. Do you have a simple or double cam?