colin22

Thanks for spending your time answering - it’s very helpful.

Thanks for your answer. It seems that changing the controller may well help me get some more power/acceleration then.

Hi all I have been riding an ‘Unrestricted’ (that’s the manufacturer) ebike for a while. It has a 350W rear motor and I changed the controller when I first had it to one without restriction. (Yes I understand the ramifications of doing so). It accelerates quickly, and tops out at about 17mph - which is close enough to 15 for me. I now also have a Batribike Sigma (which I bought because it has 7 speed Nexus). This has a 250W front motor and is restricted as it should be in the UK. It accelerates fairly slowly and still requires a lot of effort when going up hills (unlike my other ebike). My question is: If I changed the controller to an unrestricted one, would I notice any difference in either acceleration of top speed? Or to ask it another way: Is there a big difference between a 250W and a 350W motor in terms of acceleration or top speed? Thanks