Oil Level Sight Glass Concern
I recently filled the oil myself. And I noticed the MAX and MIN level are not matching the red circle of the sight glass. I also checked the manual, I noticed the oil level lines on the bike are actually mirrored respect with the center-line of the sight glass. Now I am really worried, should I trust the MIN MAX lines on the bike anymore? Recently I did only fill the oil about the MIN level on my bike as you can see from the second pic. And I noticed the bike does not sound well at high rpm. So I suspect this MIN level line is not the trus MIN level line. I also checked the diagram, and it seems the level lines on our bikes are not correct. The real MAX should be around on the top of the red circle and MIN should be slightly above the center of the red circle.
I am really worried now. Can anyone check if this happens to your bike as well?
One more question, I did over fill the oil at first. And I notice there is some bubbles when engine running at high temp. Is it normal to have bubbles in the oil? I bought my oil from SierraBMW, I assume the oil should be legit.
Last edited by whatever; 08-17-2019 at 11:11 PM.