I started my quad last night, and this morning went out and looked in the sightglass, the oils not there, I checked my buddies 450 too. It was also started last night. It to dosn't have oil in the sight glass, they're both just at the very bottom. They both should have plenty of oil because i filled them both to the middle. How long should it take for the sight glass to refill. Is it just stuck somewhere else and needs to actually be ridden for it to return?