why are my temps so high???

[Just go Play]

It seems as though many people that are running the tekno neu motors are seeing higher temps then the original neu motors tend to run at. This may or may not be the case for everyone...idk.

As for the voltage that your battery cuts off at it sounds like you are actually over discharging it. If the resting voltage is 20v that is less then 3.4vpc which means that when under a load your voltage is likely dropping well below 3vpc.

FWIW: my 1Y seems to like 5s in a @10lb. vehicle and runs noticeably higher temps in a 14.5lb vehicle with larger heavier tires. It is capable of running reliably in the heavier vehicle, just not at the same speeds for the same lengths of time.

If you can't keep the front end on the ground all that power is not doing you much good. You may as well drop some voltage and get your temps down and the power at a level that is more usable.