I recently did my first oil change in the bike. I put in the maxima pro 4 oil. In the manual it said to put 1l (one bottle) of oil in it if you replace the oil filter. So I did. I checked the oil level and it is pretty spot on. The issue is I feel like when I click down in gear, it doesn't "click" down like it used to. Eventually it does, after I tap it a few times. Its just weird, and I don't want to mess anything up. It never skips into neutral, and flips through gears fine. Guess I am being a little anal. Can anyone confirm the amount of oil to put in it? Did I use the correct amount? And after how many miles \ oil changes would you start putting synthetic in it? Gracious!!!