essex_chris

Interesting link. Can't see electric option for using a hub motor in those but i'm tired so may be missing it

There are several Engwe bikes that I am considering. My work uses www.cyclescheme.co.uk and unfortunately i'm not aware of any UK resellers who participate in this scheme. klarna and Paypal are other alternative for spreading the cost out. But when i get about a 1/3 discount and 12 months payment through Cyclescheme it's a tough option to beat. £1 spent costs 68p Considering the retailer gets paid in full up front it's surprising that more don't use these schemes

Oh I understand that there are some cons. But on balance I think mag wheels are what I'm looking for. Chunky 3 or 4 inch tyres along with suspension help. My use is 90plus percent road and cycle path. I don't ride hard. I'm not especially looking for great feel or to be able to squeeze speed from a bumpy off road track. Also considering a couple of Fafrees models. Engwe is first choice just gutted I didn't order before. I'd have it by now and they're out of stock till September - new models coming in I believe

Forgot all about this post. Ended up trimming retinning and resoldering all connections or ins some cases using connector blocks and got this all up and running a coupe of months back. 36v 250w motor runs great and both it and the controller stay nice and cool - the 36v 8ah battery is showing it's age and lack of capacity now as i haven't drained it yet but on a 5mie each way commute with the first mile of the outward journey a down a reasonable hill and therefore the last mile coming home uphill - i could leave the battery on the bike but each day at work i take it in and put it on charge. Should i want to divert from my usual route it gives me a bit more flexibility without worrying about riding a heavy dead ebike. Have a couple of weeks off now so going to catchup on maintenance - used my last spare innertube and lost a couple of the spokes in the last fortnight. Finding myself doing a lot of window shopping of £1000-1200 bikes with 48v 15ah batteries and more power, lights, cargo brackets and baskets. Only thing to note - have tried so many different settings on P07 but cannot get the speed to match GPS and the distance travelled to match either GPS or known route. Going to have another look at that as being able to glance and know reliably what the speed is would be a benefit. Controller maxes out at 20a - what woud be really interesting would be to wire in a power meter or arduino/pi zero and record this information - am a bit of a data geek so would find that fascinating to compare against incline and rider weight etc - this bike already gets a fair run in as a 20stone rider

I've been riding a Halfords Carerra Vengeance 2019 Ebike for a little over a year. Other than the usual issues with punctures here and there my biggest maintenance issue has been replacing spokes. I'm a 20stone rider and generally the bike has ept up better than expected. For a coupe of months though it has a 250w bafang motor i have had to replace the controller as it flat out died. Had a bit of troube doing that - but i think in the end after recutting and soldering ALL connections i now have it working with pedal assist and a throttle. The 36v 8ah battery does me very well but riding around 300-400 miles per month i'm in the market for an upgrade. Currently looking at several Engwe models - in fact i would have ordered an L20 for ~£1000 if i hadnt hesitated - now likely no stock until the end of August. Ideally i would get something through a supplier using the Cycle2work scheme that my employer uses - but if not i will likely use Klarna over 12 months to spread out the cost. Looking for 48v 13ah minimum battery - prefer mag allow wheels. Unlockable controller if possible. Lights and cargo carrying frames appeal - hence the Engwe L20. I don't currently have a car but will be getting something in the next 6 months but the more comfortable and reliable my ebike the more i will continue to use it for the MTWTF 5am to 4pm commute of 10-12 miles. There are so many reviews on Youtube, such a wide variety of bikess i am sure that there are many variants and models that i haven't even seen let alone researched. Any suggestions very much appreciated

Apologies for the delay, been so busy the bike has taken a back seat. The motor is the stock Carrera Vengeance Espec 2019 - it is marked on it with Bafang BFSWX02 36V250W (12) and has a half inch 9pin Julet connector. The wires in the photos are just the bare end of that connector. Thank god for it as i would have to identify which wire is which and also would have major trouble in the event of removing the rear wheel for a flat ro to replace a spoke. P09 is described as zero start - non zero start in both the a4 manual and a pdf copy i found online. Should i be wiring in the Throttle and the PAS sensor to the same 3 wires from the controller? I've tried each individually and both at the same time - all while experimenting with the P01-P20 settings but so far i am unable to get the motor to do more than engage briefly. Like there's a pulse but no real power engaged. I have 27.5 inch wheels. 36v 8ah battery. There are julet connectors hooked up to the brake levers - these and the old 790 handlerbar led indicator were wired into a 6pin julet connector through a 3 way splitter at the handlebar end - at present they're not connected at all and i hoped i would be able to simply leave them unused. There are two green wires which were the ones i clipped together which i think resolved the motor thte wrong way issue - but once it works i should disconnect those as otherwise itll relearn again each time i power on? I didn't want to bombard with photos - but if i should get good clear photos of anyting in particular please let me know. I have the manual that came with it - two sided A4 with the wiring shown and the P01-22 options listed. At the minimum if possible i'd like to get things running again using the PAS at stock power settings - just to get back using it again. If it is possible to get a throttle going great, and if i can increase the power from 250w and get a bit more out of it that'd be great too. I am semi in the market to get another bike which has 500W+ but i'll worry about that once i get this back to being a daily commute bike . Thanks for your help

Thank you for this. Just heading out for lunch but will take a look at that when I return.

This is copied and pasted from a PDF manual for the S866. My paper one has P21 and P22 also. I've tried changing various settings like the zero or non zero start, or the number of magnets, and resetting the controller back to default - but in all cases the bike when powered on turns the wheel - i can't turn it of but changing using the + and - buttons does make it speed up and slow down "4.Setting P01: backlight brightness, level 1 is the darkest, level 3 is the brightest; P02: mileage unit, 0: KM; 1: MILE; P03: Voltage level: 24V, 36V, 48V, 60V, 64V Default 36V; P04: Sleep time: 0, no sleep; other numbers are sleep time, range: 1-60; unit minutes; P05: Power assist position: 0, 3 file mode: 1, 5 file mode: P06: Wheel diameter: unit, inch; accuracy: 0.1; This parameter is related to the display speed of the meter and needs to be entered correctly. P07: Number of speed magnets: Range: 1-100; This parameter is related to the display speed of the meter and needs to be entered correctly. If it is a normal hub motor, directly input the number of magnetic steel; If it is a high speed motor, it is also necessary to calculate the reduction ratio, input data = number of magnets × reduction ratio; For example: motor magnet steel number 20, reduction ratio 4.3: input data: 86=20×4.3 P08: Speed limit: the range is 0-100km/h, 100 means unlimited speed. The input data here indicates the maximum running speed of the vehicle: for example, input 25, indicating that the maximum running speed of the vehicle does not exceed 25km/h; the driving speed is maintained at the set value. Error: ±1km/h; (both assist and speed limit) Note: The value here is based on kilometers. When the unit setting is converted from kilometer to mile, the speed value of the display interface will be automatically converted to the correct mileage value, but the speed limit value data set at this menu under the mile interface. No conversion, inconsistent with the actual display mile speed limit value; Note: The P09-P15 menu is only valid in the communication state. P09: zero start, non-zero start setting, 0: zero start; 1: non-zero start; P10: Drive mode setting 0 : Power drive (the booster position determines how much power is output, and the switch is invalid). 5 1 : Electric drive (driven by the rotary handle, the power assist position is invalid at this time). 2 : Power assist drive and electric drive coexist simultaneously P11: Boost sensitivity setting Range: 1-24; P12: Boost start strength setting Range: 0-5; P13: Power magnetic steel disc type setting 5,8,12 magnetic steel three types P14: Controller current limit value setting Default 12A Range: 1-20A P15: Controller undervoltage value P16: ODO clear setting Long press the up button for 5 seconds ODO clear P17:0: cruise is not enabled, 1: cruise is enabled; auto cruise is optional (only valid for protocol 2) P18: Display speed ratio adjustment range: 50%~150%, P19: 0 gear enable bit, 0: 0 gear, 1: 0 gear P20:0: Protocol No. 2 1: 5S Protocol 2: Alternate 3: Alternate 四、Introduction to buttons and display interface: "

These are just some photos of the controller and wiring at present. The original PAS sensor is 3 wire, as is the throttle. Red white black or red white green but both 3 wire.

I've had a 2019 Carrera Vengeance Ebike for a year nearly. Bought it secondhand last summer. Ben very please with it. Recently had a problem where the controller seemed to die and there was a short with the battery connector. Fixed that - cut off corroded battery terminals and rewired it to use two others instead. But that's when I found the controller was dead. So purchased some bits off Amazon UK to get thigs going again. I bought the following; Motor controller & LCD https://amzn.eu/d/73wpfqN Thumb Throttle https://amzn.eu/d/8htFZxC The stock motor on my 2019 Vengeance E is a Bafang BFSWX02 36V250W (12) At the moment i have wired it all up - some is soldered and some connector blocks - once i have it all done properly i will likely solder all joints, heatshrinkg everything and siicon seal up - the new controller doesn't fit into the old space beneath the battery. Initially having matched up the wires based on the colours and the wiring diagram - i could hear the motor turning but freewheeling so appeared to be running the wrong way round - one jumper type connector on the leads coming out of the controller and that was sorted. What i'm really not sure about now is what settings to use on the controller regarding magnets or zero start. I also can't work out at present where to attach the 3 wire pas sensor - the plugs are different but it's no problem i can solder them together ok. Found the manual referring to brown and black lines - but theres a purple cable on the controller which when connected worked and meant that once powered on the wheel spins - but it's very low power. Though it does adjust when pushing the + and - for adjusting the PAS level. Presently as soon as I power on using the display the wheel starts turning driven by the hub motor - but there is little or no power. If i turn up the PAS on the display it has more power but it's very neutered and wouldn't be able to push the bike and a person. After initially wiring up the battery terminal connectors, the blue/yellow/green motor phase wires and then the 6 cable for motor hall sensors i could hear the motor spinning but figured it was the wrong way. So at the moment i have the LCD connected - the motor, but not the PAS or the throttle. Have tried hooking that up to the connectors based on the A4 maual that came with the S866 but not been able to get any further. I have a 3 pin throttle from amazon with black/red/green wires - nothing corresponding on the leads out of the controller. Ideally i'd like to set it up with both the pas and the throttle. If possible i'd like to set it it up for more than 25.5kph - even at my weight the stock setup felt it could do more - but was limited. The Vengeance has brake connectors with juliet cables - but not sure about wiring that up. I have a feeling that it's all to do with the settings on the LCD for how many magnets and power settings etc but i can't work it out. I can't find a manual for the BFSWX02 and am reluctant at this stage to open it up and take a look. Though if i have to it'll be a good opportunity to do some maintenance on it. Thanks in advance

I've ended up with an S866 controller and display after my stock controller died on me. The stock motor on my 2019 Vengeance E is a Bafang BFSWX02 36V250W (12) What i'm really not sure about now is what settings to use on the controller regarding magnets or zero start. I also can't work out at present where to attach the 3 wire pas sensor - the plugs are different but it's no problem i can solder them together ok. After initially wiring up the battery terminal connectors, the blue/yellow/green motor phase wires and then the 6 cable for motor hall sensors i could hear the motor spinning but figured it was the wrong way. Found the manual referring to brown and black lines - but theres a purple cable on the controller which when connected worked and meant that once powered on the wheel spins - but it's very low power. Though it does adjust when pushing the + and - for adjusting the PAS level. I have a 3 pin throttle from amazon with black/red/green wires - nothing corresponding on the leads out of the controller. Ideally i'd like to set it up with both the pas and the throttle. If possible i'd like to set it it up for more than 25.5kph - even at my weight the stock setup felt it could od more - but was limited. The Vengeance has brake connectors with juliet cables - but not sure about wiring that up. Would it be worthwhile starting a new thread and putting lots of photos of what i had and what i've got? Thanks in advance for any help

Am currently tinkering with triggering the PAS sensor on a Carrera Vengeance by various means - is there a maximum number of times to activate the PAS sensor before the controller will either ignore the pulses or give an error? Does the motor sense the speed or is it based on pedalling rate, or another sensor elsewhere which uses the wheel size to determine speed. I assume somewhere once the bike controller believes the bike is going at 25kmph it stops providing power to the motor. Rather than amending the system as it is i am passing a ring of magnets by the hall sensor - works ok in testing so far but plan on making it all a bit more elegant and practical. Same system should work on any bike with a similar sensor prompted by pedalling motion

Possible this is one of the reflectors - my bike had a little too much play and depending on the road surface i would hear the reflector tapping against the spoke. Drove me nuts but figured it in the end

Morning Preload. Read this thread with great interest as i have just got hold of a Vengeance with the 790 second hand. Mine had a cracked magnet disc which when the chain slipped has actually broken in pieces - but i have managed to jerry rig something temporarily. I am looking to do similar to you and make a few upgrades so wanted to check - is this where you are referring to? https://www.aliexpress.com/store/4709069 I'm going to do some research today and look at those components you mentioned. I'll start my own thread and include some photos of what i currently have to confirm with the much more knowledgeable people on here before i go ahead. Are you pleased and what did you spend in total? Thanks