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I haven't found any 48v 1000w controller that has speed limit, so that's why I asked if I could use 350w controller instead.

Can I use motor controller that has lower power than the motor has? For example 350w controller with 1000w motor.

Here in Finland 1000w is legal, but 250-1000w requires insurance.

I'm looking for a motor controller, that has a proper speed limit. Most of the Chinese ones have an option to adjust max level of assist (for example 50%). But I'm looking for one that shuts off the motor when speed is 25km/h. I have also seen some controllers, where speed limit can be adjusted...

By setting it to lower power mode I mean breaking other power mode wires, so they won't work anymore. I think that's legal enough...

Well it's 250W motor (originally 1000W but I have set it to lower power mode). Why it doesn't go that fast is because my ''bike'' is a pedicab that weighs 160kgs and with passengers and driver up to 400++ kgs in total.

Yes it does, and thats the main problem. It shouldn't assist anymore at that speed. And yes my bike already has PAS sensor and motor controller has a wire for it so the problem is only speed limiting

Yes I meant that it's illegal to go over 25km/h with assist. Without assist you can ride as fast as you can (same speed limit as cars next to you)

I have pedelec with hub motor in front. Motor works well, but the problem is that here in Finland it is required, that motor stops working at 25km/h. My motor wont reach 25km/h by itself, but it is required that motor wont work when I reach 25km/h in downhill. My motor controller doesn't have...