the Unite 1000watt motor is rated at 35amps. that controller should work perfect
TNC Scooters (Scooter Sales and Service)
use this one, I have this one my self....
look at the TSP100
I dont recomend used parts (TNCscooters sells pulled parts) I have had problems with 3 controllers from that company and every time they would send out a replacement controller it would be even worse....You can buy your parts from any place but I stronly recomend parts that come in a factory sealed box, the last motor I got the data sticker was partially removed, like to say they sole me a 750w motor and popped a 1000w sticker on...it was a thought that crossed my mind that pissed me off a tad....
Buy NEW, you support the Economy better that way, and you get what you really paid for that way...
look at the TSP100, if it fries it will have a heavy warranty and customer support that helps.