i have been sold a micky by e-bike ,they advertised as select between pure electric or ped assist ,but my bike has yl20c which has on menu 10p a 0,01,02 which should be no assist ,electric , and ped assist , but only ped assist works ,and of course no assist if i dont turn on ,in the manual they sent i should have the yl80c but that was wrong ,thats what you get on the us mod not the eu/uk mod ,but they dont tell you that ,the bike is very well made and works ok for me ,but as it said in the full description you could switch i bought so my disabled partner ,who can just stand and walk [but cant pedal] could enjoy as well ,any ideas guys i have heard some have tried just changing the display over but got problems with error codes ,but i wonder if they were able to engage just electric i would like to know ,it was an old post i asked but as yet no reply , i would welcome any ideas on how to change settings and of course engage pure electric , someone else said you need the yl80c and controller ,i have only found where i can buy the display not the controller yet and i dont know if that would work , i tried to get a refund but as i had been using bike no good ,but i still think it was very deceitful ,information would be great thanks