how to reverse motor rotation
 

Im building a xr10 and just want to confirm that the rear motor has to spin in the opposite direction right? And to do this i just have to swap motor leads? Do i have to rotate the end bell? Its a tekin 45t motor.

Re: how to reverse motor rotation
 

Yes, 1 motor must rotate "reversed" from the other in a MOA.
If the motor is brushed (sounds like what you have), either:
-Swap the red & black motor wires at the motor
or
-Rotate the endbell 180*

Do NOT do both as they will cancel each other out.;-)

Re: how to reverse motor rotation
 

Is there an advantage to either one? Or just simply one or the other with the same exact result? Swapping the leads seems much easier than rotating the endbell.

Re: how to reverse motor rotation
 

No difference electrically.
Some people don't like soldering, so the endbell flip "may" be easier for them.
Keep in mind, doing the endbell flip usually means removing the motor, loosening the 2 screws holding the endbell on, twist the endbell, tighten 2 screws then reinstalling the motor. You can't "just rotate" the endbell as the wires will likely be in the way.:roll:8)

I just do the solder job.......

Re: how to reverse motor rotation
 

That motor has adjustable timing. If both motors are set at 0 degrees you don't need to read this, just follow the above of swapping wires/rotating endbell.

Timing is kind of tricky to explain but I'll do my best. Its kind of like spark advance in a gas motor. Positive timing = faster motor forward and slower motor backward. Negative timing = slower motor forward and faster motor backward.

When you look at the endbell of the motor you will see a timing mark on the endbell and a timing mark on the can. When those marks are aligned you are at 0 timing. If you want to tune your motors a little bit for more wheel speed you would run a little + timing on the front motor. Since the rear motor has to spin in reverse you would run the same amount of - timing on the rear motor. Just be aware that if the motors are shipped to you with a little timing, to set the rear motor to - timing.