So I just did an oil change on my Ninja 250 a few days ago and I over filled it. Anyway what Im wondering is what is the correct way to use the oil sight glass? While the engine is running or cold do you want to have a proper level of oil? I went based off a youtube video I watched that he filled the bike till it was about half way, started it and then filled it more based on that. Well aparently that wasnt correct since I over filled mine. Tips please!