I bought a tmaxx.Fired right up.Then ,I realized that when I throttled it don't move.I found it has no clutch pads.Can this be why I was having trouble tuning the motor?Ran rich! gas going out of the pipe,lots of smoke.Then I leaned it,but still acted funny.It's before the fact I,realized, I had NO clutch lol??Does it need a load on the motor to tune??