Thread: New Product Official Eflite UMX Beast 3D
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Old Oct 13, 2012, 06:11 PM
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Yes that is normal. Many motors will do this as the magnets cog into place as Mike put it. Some rotors are a bit more tight than others.

If your batteries are older, and you did not put them into storage voltage regime before leaving them, then they may have begun to age prematurely. I'd try some new batteries or try cycling the older one a few times on you charger.

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