48v fat tire hub motor making a buzzing sound when applying throttle

[papagizmo81]

I have a riding times z8 fat tire ebike I bought it used it had been wrecked had no issues with it I went to ride it and one of my shock springs come loose and flew off I threaded the shock back together without putting the spring back on and rode it maybe 3 blocks now it's making a humming kinda buzz sound when I apply throttle I've tried cleaning re greasing and nothing is working for me can someone please point me to the solution

 

[E-HP]

So one shock has a spring and the other doesn’t? Does it make the same buzzing with the rear wheel off the ground?

 

[papagizmo81]

It does after I put the shock springs back on and sometimes I can twist the throttle and it doesn't want to do anything

 

[E-HP]

Does the buzzing change depending on speed?

 

[papagizmo81]

Yes gradually gets louder when I throttle up but once it gets to certain speed is it goes quiet just to hum loud slowing down and gets real loud going up a hill

 

[amberwolf]

Since it was wrecked, and has since had a severe mechanical failure, you might want to carefully examine all of the wiring between motor and ocntroller all the way from the axle exit to the controller entrance. It is likely that the wiring is damaged either from the wreck or from the twisting forces placed on the swingarm either during the failure event or after it.

It is even possible that the axle is actually broken and the wiring has been damaged inside it near the fracture. (you'd probably have to take the motor off to verify this).

Another possibility is the caliper for the rear disc brake is misaligned, bent, or broken, and the pads are rubbing on the disk.

This bike comes up in a search for the name you posted; is this what you have?