11-02-2015, 01:55 PM
I check my oil level every few hundred miles. I checked the oil before my ride last Sunday (strictly by the book), and I was shocked to see the level down to the lower of the two lines in the sight glass. The bike had been ridden the day before, and sat in the garage overnight. So I started the engine and let it idle for about 3 - 4 minutes. During this time the oil completely disappeared from the sight glass (Bike was on center stand, on level ground). I turned the motor off, and let it sit for about 5 minutes, and the level was now just below the lower sight glass line. So I added about 6 fl. oz. of Honda 10 w-30 (full synthetic), to bring the level up to the top line in the sight glass. Confident my oil level was good I went on my Sunday ride, of about 150 miles. When I returned home I went through the oil inspection routine, strictly by the book, and the level was now so far above the top line in the sight glass that the window was completely filled! It appears that there is some kind of a check valve in the system that prevents the oil in the oil cooler from completely draining into the crankcase when the engine is turned off that does not appear to be functioning properly. Has anyone else experienced a similar situation?