I got the GoPiGo from one of Dexter Industries’s official distributors. One of the GoPiGo tyre is "unbalanced"
http://tinyurl.com/zcw6opw 
The GoPiGo is always turning to the other side now 
Can you swap the tires and see if the GoPiGo turns the other direction, if not then you’ll have to calibrate the GoPiGo. We do this by adding trim to the motors. Basically you run one motor faster than the other. Here is a guide to do that: http://www.dexterindustries.com/GoPiGo/programming/python-programming-for-the-raspberry-pi-gopigo/add-trim-to-the-motors/.
Can you try this out and let us know if that helps.
-Karan
Yep, it goes the other direction.
Hey KingCraftNub, we often recommend putting rubber bands on the wheels. It adds much better traction than the wheels you see there. It might help balance the rotation, if you put rubber bands on both wheels.
Still happens This is also affecting my line follower The dent is too serious
Actually, does it matter if an encoder wheel is loose? It’s not coming off though.
If the encoder wheel is still connected to the motor shaft then it should be ok. Can you post a video of how the GoPiGo works with the wheel on the left side and with it on the right side.
-Karan
I did some testing, it seems to be something related to hardware, wheels, motors? I couldn’t replicate an issue where the GoPiGo turned left itself, after that it turned right itself (Both unintentionally). No trimming used here. It happens often though. But I could replicate this issue. http://tinyurl.com/zbj8mhm This issue is about the GoPiGo moving to the left, then reverse, which also curves to the left more severely. then forward, then backward. No trimming used here.
I also tried trimming the motors, but when I use a positive trim value found using trial and error, it moves in a straight line but after 6 seconds of moving, it turns to the right…
FYI, the voltage of the battery is now just 8.7V, I just got the batteries yesterday
EDIT: Now the curves to the right omg…
Notice the encoder wheels and the sound for each tire. Maybe caused by this?
It definitely looks like one of your motors is busted from the video there. What I see is that the shaft seems to be split off somehow. Did this just happen or did it come that way?
Judging by the way you’re spelling “Tire” you’re not in the US, is that right?
I think it came like that, I just got it. Sadly, I don’t live in the US, I live in Malaysia.
Hey,
It really looks like you received a broken motor. Thanks a lot for testing it out. I’m really sorry for the frustration.
Can you contact us here, under “General Questions and Feedback”: http://www.dexterindustries.com/site/?page_id=65 and mention the problem, your order ID and details and a link to this post. We will have one shipped to you immediately.
Again, I’m really sorry to hear about this; we’ll make it right immediately.
-Karan
Can you help me with this too? https://drive.google.com/file/d/0B64g8pWj_kUtXy1zT1h6V0dsdDg/view?usp=docslist_api
I have no idea what’s wrong, I installed it wrong? It’s unable to turn to the left side but can to the right side https://drive.google.com/file/d/0B64g8pWj_kUtTG1BM2NpdEJ5UDQ/view?usp=docslist_api
Looks like you just need to back the plastic lip off the servo, recenter it, and then re-attach it.
Doesn’t help, the problem is the rotation
Yes, that looks like you need to do the following:
1). Turn the Servo 90 degress.
2). Unscrew the servo motor from the plastic lip.
3). Turn the servo motor back 90 degrees and then screw the servo motor back into the plastic lip.
Everything looks fine, you just need your servo starting at a different angle. YOu can correct that by removing it from the little white plastic lip, turning it, and remounting it.
Good news is I received the package, bad news is one of the motors have the same defect as my old one.
Check the video out, now both of my motors have issues, the one connected to the chassis is my old one, the one holding is the new replacement. goo.gl/RrNolh
The new motor is not moving but vibrating.