John_S

Many thanks for your detailed responses guys. It's clear from your helpful advice that the controller and LCD both need to be changed. Therefore, I think I'll go with the 35a KT torque-simulation square wave controller and the KT-LCD3 display, both of which I happen to have in storage. I'll reduce the current using the LCD to something around two thirds of the 35a in order to protect the DGW07 Shengyi motor from overheating. I understand this is a decent motor and is possibly a clone of the Bafang SWX02; itself a powerful motor although slightly less powerful than the old Bafang BPM which is now hard to find. I'll keep you updated on how it goes with the adjusted setup. Many thanks guys!

Hello. I've got a bike with the 36v Dillenger road-legal front hub kit that has a 15a Lishui controller (product no.: LSW1155-19F) and Bafang C965 LCD display. I'd like to upgrade the controller to one with more current to give more of a boost going up hills. It would need to be an external controller as it wouldn't fit in the tiny enclosure designed for the current controller. I'm wondering if anyone can suggest a compatible controller that has greater current (preferably 20a or more)? Many thanks

I understand about the current, but I also gather that there are other variables too that make some motors inherently more suitable for hill climbing than others. The old Bafang BPM motor (which I have one of in storage) was regarded as exceptionally good for managing the hills, for instance. I'd prefer not to change the voltage of the Wisper bike, as I think 48V would make the bike's default speed too fast (33% faster, AFAIK), and above the legal limit. My bike was bought by the original owner in October 2021. Older official descriptions that I've seen of the Wisper 806 describe the SE version's motor as "high torque" but the Torque version's motor as "ultra high torque". I think my bike is a later one than the point in time when this distinction was being made, although I cannot be sure. Either way, I don't doubt that the bike has a good motor.

Thanks Wisper / David for your reply. Just to clarify, you're saying they have exactly the same torque? The bike I have might be a few years old (not sure, but potentially as much as five). Would it still have been the same motor on the two 806 models at that time? I only ask because I'm fairly sure I saw a post from a few years ago by a Wisper representative on here saying the Torque model had a higher-torque motor. Cheers. John

Thanks for your responses. I purchased the bike and an 18ah battery, the latter from AliExpress. I've read that the Wisper 806 SE has a lower-torque motor than the Wisper 806 Torque. I live in a hilly area and need a high-torque motor. Anyone know if it might be an option to swap the motor on my SE bike with a motor from the Torque model, whilst keeping everything else (i.e. cadence mode of power delivery) the same? Cheers

Hello. I'm pondering whether to buy a used Wisper 806 SE that someone is selling. It needs a new battery, but the seller has said that everything else is working. A new battery for this bike is costly. I'm wondering if an alternative option is to look for a compatible third party / generic battery. Would this be an option, and if so, is there something specific that anyone can suggest? Many thanks guys, appreciated

I'm from Llandudno and am interested in the idea. I don't know of a pedelec club nearby.

I certainly hope the new bill will result in throttles becoming legal. However, the user Flecc (who is clearly very knowledgeable) believes it is highly unlikely.

Would it be legal to have a throttle limited to 4mph until you pedal, to help with starting off from a standstill? I read something suggesting that 4mph throttles are legal, but only in walk mode (i.e. you have to be physically off the bike).

Interesting. So does this mean that the rules applying to twist-style throttles might not necessarily apply to lever-style throttles?

Thanks. That sounds like good advice. My main concern is if I was to get involved in an accident, and my bike was to be inspected. I assume the existence of a throttle could get me into legal trouble. I realize its very unlikely to happen, so perhaps its a risk worth taking.

Thanks for this information. Is the legislation banning throttles completely unambiguous in that DIY conversions are definitely included in this law? I guess it doesn't matter anyway if DIY pedelecs are illegal on other grounds by default. Do you know if there's a straigtforward process I could follow to make my DIY ebike legal (with a 15mph throttle)?

I see. I'm very much hoping for a change in the law regarding throttles, as I struggle a lot with hill starts, or setting off quickly at the entry to roundabouts or crossroads. Not to get off topic, but am I right in saying that 15mph throttles on DIY ebikes are also illegal, just as they are on store-bought bikes? What if some of the electric components of the conversion were manufactured before 2016 (perhaps meaning that grandfather rights could come into play)? I've read some posts on here that have implied that throttles on DIY conversions are legal, although its a bit confusing. This is of interest to me, as I've recently converted my mountain bike to electric. My bike has a throttle which I've currently deactivated.

If e-scooters become legal, does that mean twist and go 15mph throttles on e-bikes will probably become legal too?

I see. So in my case, the nominal voltage is actually just under 47V. If I were to get a 14s battery in the future, I figure that my bike would go very slightly faster (perhaps 1mph faster) than it does currently, although as I'm keeping my bike legal, the result would just be that the bike would keep cutting power more frequently. I'm glad that you've found my advice useful in your decision to order a BPM yourself. Its a great motor.