Golden motor 108 compatibility?

[oded]

Installed a 1.5KW Golden motor (model 108) https://goldenmotor.bike/product/1500w-bldc-motor/in a home built 48V rig.
tried 2 Votols (EM50S & EM150), and a Kelly KLS 7218N, but can not make these combos sync.
free spinning on a jack, works great, but once under load, the motor is cogging & stuttering, and already cost me 2 controllers (burnt them). battery is in great condition, capable of over 100 amps easily.

any ideas which controller fit this motor?

 

[ebike4healthandfitness]

How much gear reduction?

 

[LewTwo]

GM used to sale their own in house motor controller.
4-8 Newton Meters .... that is not very much torque.

 

[ebike4healthandfitness]

Also what tire size are you using?

 

[oded]

Front 9t sprocket
Rear 102t sprocket
24' tire
Upgraded an Oset 24 to brushless

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