smoke

So I keep reading some smoke from the breather tube is normal but haven't been able to figure out how much that is. So I took a video of what I'm dealing with: Getting this after about 20-30 minutes of riding. Warm, relatively humid day (85 degress, NYC area). The bike runs fine otherwise...

Hey Guys! I hope everyone had an awesome Thanksgiving! I recently bought a 73 cb 450 (my first bike). I noticed that there are some smoke coming out of where the header and exhaust connects. Any help would be greatly appreciated! Also here's a photo of my bike! Thanks!

Just purchased a mostly stock '78 CB400t. 6200 original miles. This is only the second bike I have owned, Last was a 02 Yamaha VStar 650. I did notice today after my first longer ride (40min) the engine was smoking slightly. Haven't noticed anything leaking, any ideas?

I recently got a '78 CB400 and it's been running a little jenky since day one. I've cleaned the carbs, did a quick oil change and slapped some new shorty's on there (I figured the back-pressure loss might be to blame as it was straight pipes when I got it) but it sounds as if the left cylinder...