So I bought this bike last summer and haven't ridden it a ton. But I went out to start it up for spring yesterday. It started easily (like it always has) and idled and seemed to ride out "normal" or very well. Very powerful and crisp, no smoke, very smooth. This time, I noticed the amount of air that is coming out of the head breather! No oil, just a lot of air.. it's almost like a mini exhaust! At first I'm thinking that the exhaust valve has issues, but wouldn't compression suffer? Or performance? The bike runs well.. Is this normal? It makes perfect sense that the crank would make/suck air as the piston goes up and down, but man that's a lot of air!! It's like a small fan! Also, I did some research and think this is "normal". If the bike is still, on the stand, stopped, etc... and I just whack the throttle open quick, fully, and hard it will just cut out and die. You don't really notice this when you are riding it as you always have some sort of "rev" going. Also, if I rev it slightly slower, she'll rev like a beast! It does have a 450 carb on it, and other than what I just complained about it carbs great. Is that somewhat normal too?? THanks!