polarna

hello. need some advice on upgrading my polarna m4 750 watt motor to a 1000- 1500 watt motor. the polarna doesnt have regular spokes. it has the six spoke wheel. the motor slides in to the housing. without changing to a spoked wheel on the rear, does anyone have the knowledge of a motor that...

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Hello i have a polarna m4 that looses power or cuts off power at 46 volts or around 46 volts. is this a common thing? does the controler tell it to stop? kind of bummed it wont go further.