n2eus Posted June 27, 2017 Share Posted June 27, 2017 Today, my new Gotway Msuper V3s+ 84v (1300wh) failed. It had performed fine on this route previously. Started with 91% charge on the battery, rode 7.6 miles on relatively level bikeways, then while creeping slowly along the walkway, the MSuper began quivering violently (approximately 1 inch oscillations in the top end). The indicating lights remained illuminated even after pressing the button. Within a couple seconds, I heard a "pop" sound and saw a puff of smoke as the burnt smell hit my nostrils. It appeared to be off after I placed it on the left side. When I got home, I took a look (didn't touch internals) and found a loose axle nut and a couple burnt MOSFETs. See attached photo. This wheel has never dropped off a curb and has always been driven gently (no sudden changes in torque demands). My takeaway is that if the wheel begins quivering/grumbling, or is otherwise not as smooth as normal, it may be warning of a loosening axle nut. Maybe others have experienced violent feedback from your wheel and found a loose axle nut? Link to comment Share on other sites More sharing options...
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