Lots of air coming out of oil filler hole!!???
So I was changing my oil, and after filling the bike with new oil, I started it up to circulate the oil in order to get an accurate reading through the sight glass. I had left the oil filler hole plug off and noticed that there was a strong blast of air coming out of the hole as the engine was running. When I say strong, it almost felt like the air coming out of the exhaust! I could feel the air pressure coming out of the hole a full three feet away.
Is this normal or not?? I bought the bike a couple months ago and it seems to run just fine. Starts right away, and it feels like it has plenty of power(this is my first RC though, so I really have nothing to compare it to). Bike is safety wired, so I'm sure it has seen some hard riding, and I do believe it has the smog equip removed/blocked off(not 100% sure though, just assuming because all the other free mods are done on it.) Sooooooo, is this a sign of tons of blow-by and imminent engine failure, or is it normal?