The oil tank has a built-in pressure relief valve. If the oil tank is overfilled, excessive pressure is created in the oil tank. The pressure relief valve opens to relieve the pressure and prevent damage to the oil tank. Excessive oil due to overfilling is forced out the pressure relief valve when it opens.
See Figure 3. Remove the filler cap. Check engine oil level.
Below the lower mark: Add only enough oil until the level reads between the upper and lower marks.
Between the upper and lower marks: It is safe to operate the motorcycle.
Above the upper mark: Drain the oil until the level reads between the upper and lower marks.
Install the filler cap.
If oil was added, remove the filler cap to verify the engine oil level in the oil tank. Do not fill oil tank to a level above upper mark on the dipstick. Install the filler cap.