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Thanks. Does this mean staring in to the dark abyss of shopping on Aliexpress? What is a 'small' battery? 24v rather than 36v? Or just less ah's? Is 'Yose Power' a reputable source? Cheers, Baggers.

Hi. Presumably this is the cost of a full conversion kit without battery? Cheers, Baggers.

Really cool bike Jimmy! Cheers, Baggers.

Many thanks for this additional info. Indeed sounds like a superb brand-new rig for £1bag. Health to enjoy! Cheers, Baggers.

Great thread, especially for a complete newbie like me, thank you. Where didnyou source your kit from and what was the cost? Cheers, Baggers.

More great info! Thank you! Now potentially the daftest question of all: With a 36v battery and a 250w motor, naturally I assume a 36v-250w controller is in order. What effect would a 36v-350w controller have? Cheers, Baggers.

Thank you Neath - really helpful explanation. So from a 24v base, 36v is a helpful real-world upgrade, subject to a 36v controller that can handle 42v? Re. battery 'ah' figures, do these simply mean more range the higher you go? Or do ah figures have further implications? Cheers, Baggers.

Thanks for this reply. Please forgive my ignorance - but what are these 's' numbers of which you speak? Cheers, Baggers.

Thank you for this. So is a replacement controller readily available? Presumably, to swap ovee, it needs to be the same physical size as the original, rated 36v and for a brushless motor? Is the wiring to/from these things fairly interchangeable/plug'n'play? I've seen them online but never to this point understood what's what... The bar-mounted control on the bike is one of the old-school '980' ones, with a few LED lights but no LCD screen. Presumably this needs factoring in also? Cheers, Baggers.

Hi folks, I'm a complete newbie reading this thread and many others on the forum, in order to try and get my head around the electrickery side of things. I have a used bike currently/hopefully winging its way to me, my first step on the ladder. It's a manufactured 24v bike (front-hub brushless motor) with a 24v 8.4ah battery. From advice received by knowledgable members in another thread, I am resigned to 1. the inevitable need for me to replace the battery and 2. that the current battery spec is 'a bit bobbins'. My question is therefore: Can I consider a 36v 10ah or 36v 12.8ah battery to replace my 24v (these options are available as 'straight swap' via Yose Power, alongside 24v 10ah / 24v 16ah) - or will doing so fry the bike? Cheers, Baggers.

Hi Mike and thanks for this explanation. I guess I will need to get the bike bought & landed, then see exactly what I have to work with, establish options and go from there... Cheers, Baggers.

Thanks for this clarification. Presumably any 250w motor is legal in as much as it won't have enough guts to get beyond 15mph on the flat (especially with a portly pilot)? Cheers, Baggers.

Thank you! Even more really helpful information. Is a hub-style motor 'direct drive'? Cheers, Baggers.

Thank you. Yours was one of the threads that via Google very first led me to this site.... It didn't put me off going in the Hopper direction. Should it have? Cheers, Baggers.

Thanks Andy. From what I can see from just a few days' research, in terms of the s/hand market for electric bikes it's fairly polarised: Sub-£400 = generally entry-level cr@p bikes that are more often than not basket-cases. £400-1,000 = not a lot on offer (beyond my budget appetite to have a 'punt', in any case) £1,000 upwards = where the good-stuff is and where the proper fun starts. Presumably this is where we all end up once bitten by the bug, whether by way of purchase or conversion? For now I am happy to scrape the bottom of the barrel and see what can be achieved for under half the lowest number above (and if it's a complete failure then not too much harm done). Cheers, Baggers.