Just bought a 2010 Rmz 250 which is my first 4 stroke after several 2 strokes. Noticing loads of differences from my 2's as expected so was just wondering if its normal?

-Firstly the exhaust and engine get super super hot compared to my 2T, On startup steam smokes up off the front pipe, which has got WD40 from cleaning, so it might be that evaporating, but is still odd?
-There appears to be no fuel 'off' switch on my 4T like on my 2T?
-Even if i stand several meters back from the exhaust on the 4T whilst its idling, I can feel the air blowing from the exhaust on my back?
-And finally I had a little nosey where the front pipe slots into the engine and there was like a black residue everywhere inside engine, looked like burnt fuel or something, whilst my 2T's were allways spotless in the engine, so am I running too rich or something?

If anyones got a spare manual for a 2010 rmz250 i'd give you an offer on that aswell

Is this all normal!?!?!
Thanks in advance