Ok, first off my quad is an '03 Raptor 660, only been used for 15-20 hours since it was built by Yamaha, so I did a bunch of stuff to my quad today, all the radiator fluid is good and full, but notice it is sort of a brown color, did a Radiator Coolant Hydrometer test, all was good, because the reading said the coolant would NOT freeze til it hits -15 degrees outside, (Which it will not in NJ), and the coolant is NOT oily feeling, it feels fine and smells "sweet". Why is the Coolant brownish tho ? Could it be that it never was replaced ? It only has 15 hours riding on it.