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Author Topic: Pinging Sound  (Read 5757 times)

Offline MagneticMotorE

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Pinging Sound
« on: August 25, 2011, 06:13:19 AM »
why does my Magic Pie II make a pinging sound when cruising?

it sounds like something may be loose...
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Offline Bikemad

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Re: Pinging Sound
« Reply #1 on: August 25, 2011, 10:42:02 AM »
If it's making a pinging noise when riding without a battery, it may be because the spokes are loosening as they settle in with use.
Check the tension of the spokes and re-tension them if required using a size 13 spoke key. Make sure you tension the spokes evenly to ensure the wheel remains true.

I use a universal spoke key like this:

It's cheap and cheerful, but does the job nicely.

The pinging noise from the motor under load is caused by the electromagnetic pulses from the stator windings.

Alan
 
« Last Edit: July 05, 2017, 06:05:28 PM by Bikemad »
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Offline MagneticMotorE

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Re: Pinging Sound
« Reply #2 on: August 25, 2011, 05:50:12 PM »
you are truly helpful.. :D
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Offline DirtyGinge

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Re: Pinging Sound
« Reply #3 on: August 25, 2011, 08:54:20 PM »
my experience is that the new pies are shipping with very loose spokes...much better that you go to a bike shop and ask them to tighten for you, as you may pull the hub away from the middle......
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Goldenmotor Magic pie rear ....2000 Watt peak
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Offline MagneticMotorE

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Re: Pinging Sound
« Reply #4 on: August 27, 2011, 06:48:35 PM »
i tighten it up already but I think I might consider the going to Bicycle Mechanic to Make Sure it is Balanced. Makes Much Sense!
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Offline e-lmer

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Re: Pinging Sound
« Reply #5 on: August 27, 2011, 11:50:51 PM »
I have found the spokes actually loosen while
riding in my Magic Pie.  (It has been trued once.)

I have never had a double walled rim before, I think
that the inner tube has always pressed the spoke
caps and held them on other rims.

I just re-trued my rim after one cap actually came off
and fell into the rim.

I am going to put lock-tight on the caps after I ride and
re-true it once more.
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