Hoping someone has dealt with this - I have an '09 450F with about 9 hours on it. I have change the oil twice, replacing the filter both times and filling based on the volume spec'd in the manual. Before heading out on my last ride, I noticed a fair amount of oil leaked out of the overflow tube (from the cylinder head) after it had been sitting for a while. I rode it again, washed it, put it away, the next day I noticed it had leaked out of the overflow again. Any advice is appreciated!