Seat stem? Really? I can't see that it could make the sound.it turns out it was something to do with the seat stem. I moved the seat slightly higher and aligned it properly and the creaking sound is gone. I tried it on a big steep hill today
I'm getting a noise also, probably what's being described as creaking. But I don't get it all the time... and I'm as sure as I can be that it's not the motor. I'm about to check the crank arms to make sure they are tight, but to me the noise seems almost to be coming from the front suspension. Seems to be more when I transition from less pedal torque to more. Guess that sounds more like crank arms. It's not really bothersome but I'd like to pin down where it's coming from and why.