1.5 minutes and then a 10 minute sit isn't enough warm up time. My bike takes 1.1 lieters of oil, so i just use 1 since some gets left in there anyway through the change. I run my bike about 5 minutes then do it right after. The other thing is you need to make sure to open up the air screw to let it properly flow or open up the cap on your case you pour the oil in.
Ah ok fair enough. How long would it take for a 250f to overheat? I opened the filler cap, air screw ?