Hi all getting back into riding and just brought home 07 400ex, I know its not a blaster but always got good advice here from nice people. Well I just unloaded it and thought to check oil, and its not showing up on dipstick, bike is cold and its 20 or so outside, could it not be showing up cause motors cold or out of cause its out of oil??? Bike ran great not smoke no noise. Please help...thanks in advance