The normal is that brushless inrunner warm MORE than the outrunner...more normal is when don't exist air in...the unique form of dissipate the hot is by thermal transmission between winding and armour.

Mine warm too, but my motor is stuck with 2 blocks...the transmission of hot is made to the all robot...

For now i use the Turnigy XK4074 1400Kv, but i waiting to put the XK4082 1600Kv.