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Just had to have a new motor after only 2000 miles in 6 months. The tests showed the system was normal but the power output was useless. Has anyone else had this problem?

I have two bikes. An oxygen which has a throttle and a Kalkhoff proconnect 10 which doesn't. Due to treatment for cancer my legs have become incredibly weak and I desperately need something to override the torque sensor to enable me to get up our 17-20% hills. The oxygen is easier to ride but...