GoldenMotor.com Forum
General Category => Magic Pie & Smart Pie Discussions => Topic started by: diverdon on January 19, 2026, 09:37:38 PM
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Hello , Seems like forever since I have even had anything to ask about .. The 1000 watt Magic Pie Front motor has been working perfectly .. Finally after I don't know how long 1-2 years .. I noticed little clunk sometimes when I braked or gave it some power .. Sure enough the Right side axle nut had backed off a little .. I had it double nutted and marked so I could see if it moved ...
I retightened it for sure over the torque spec but being careful as the threads on the motor shaft don't go all the way around "weak?" .. So I double nutted it again .. used some locktite this time ..
I am using a Grin Tech Torque Arm .. 1 on each side .. Has anything better than them come out ? One of them seemed to fit the axle better than the other .. I wish there was a "file to fit version" .. Anyhow probally worried about nothing .. I ride this bike at least an Hour allmost every day ... Thanks for you Time and help ..
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Hi Don,
The Grin Tech torque arms should be fine as long as everything is tightened up sufficiently.
All my converted bikes have steel dropouts and I have never used torque arms. On my High Power Magic Pie I used longer modified car wheel nuts to ensure that the threads did not strip when tightened really snug.
If both of your axle nuts were done up to ~80Nm (59 ft/lbs) before adding the additional locking nuts then the axle should not be able to twist within the dropouts.
Alan