For those that don't know, i bought a bike a couple of weeks ago and it was running well until the fuel tank started to leak, well... leak is an understatement, more like it was gushing fuel horror movie style. So anyway i fixed and sealed the tank, now its out of action until i paint it. While i had the tank off i decided to have a look around and noticed the coolant has gone black. So i'm going to change it (coolant, not the bike). Question time. - Does the engine have to be running in order to fully bleed to coolant. - On the coolant reservoir cap it says "Water", does it mean add water,coolant or mixture of both? Again, sorry for the noobiness of my question.