IrisAerial, here's the deal with balancing motors.
It's worth doing, and a huge time consumming pain in the *** to do.
When you thing you've got it right, it's great, but one little scuff up with the ground will throw that motor back out, as will time as the bearings wear out.
I did it to my Tigers and am glad I did it, but not as glad as I was when I finally finished doing them.
If your Tigers have the manufacturers tape wrapped around them, remove it, clean the barrel up really well. That's usually all it takes, really.
If the motor does not have the tape, but is engraved instead, then to balance them you will need to add some weight to the back side to compensate.
The prop hub needs to be on, whole thing balanced as a unit.
Bearings are always the first suspect once you have removed the tape, or added, and the balance has not come out right.
Try to keep a few bearings, prop hubs and Snap ringe on hand, as getting them for Tigers is reall hit and miss.
Foxtech is the best place I've found.
Once a motor is properly balanced, when running, it will just sing to you. It just sounds happy.
What I have found out since balancing my motors is;
1. If the motor has tape, just remove it, it will pretty much balance out smooth as can be afterward.
2. Motor mounting is a critical area. 4 screws securing the motor is a lot better than 2, and using a washer to create more load grip to the mount is highly recommended.
3. Bearings are always suspect. There are lots of gripes out there about EZO bearings, but what I've experienced is that once you have a good set installed they last a very long time.
