Yes , I'm not surprised as the motors can put down some serious torque. Iv only done 42 miles on mine and iv bought a chain checker!. I'm wondering if ebikes aught to have a beefed up gearing system to match the power output of the bike, something for future development no doubt.
I'm just a newbie at this game but it seems to me that alot of these creaking problems are related to carbon frames,I'm not totally convinced about carbon over aluminium .as for the weight saving , I can't see that as being all that significant. Il stick with aluminium for now.