JOIG

I had a look at the 806 manual as taken from the the Wisper site . I think you can switch off the torque mode. 3.4.4 Setting H is used to turn off the torque sensor. On setting H as soon as the pedals are rotating you will receive maximum assistance from the bike. You will not get any assistance on start off until the pedals have been turned ¼ of a revolution. H setting should only be used when you want maximum assistance from the bike without putting much pressure on the pedals. Using H setting will reduce your range by up to 30% Don't know if this solves your problem might be worth trying.

One way to check is the LED indicator on battery . Does it drop? Failing that if you have voltmeter it may be worth checking volt and see what the drop is after your ride. I have a 905 with the 575 battery and it does tend to show four bars and then drops suddenly after about 35 miles depending on hills etc.

On the whisper batteries there is a USB socket. Is there a software program that can be used to the access the battery and maybe show the condition/faults in battery? Perhaps someone on this forum may know the answer

Pleased to say all working now . I ended up replacing the PAS sensor which got everything working as intended.I still have to try and make something so i can get my now external speed sensor close enough to wheel magnet. Thank to vrf400 for all your help its certainly been a bit of an education for me

Hall sensors arrived today and fitted I now have correct voltage on all three hall sensors. But i still have same problem motor will only run using hand throttle and only at walk speed. I have an external sensor on order for speed sensor problem . Does this bike need a speed signal to allow the motor to work at anything faster than walk mode ?

The new cable and controller arrived from Wisper and i fitted them and i got the same result . I went through my voltage measurements again and the blue cable is the only one that gives a reading satisfactory reading 0.02-4.75v as i turn wheel backwards.The yellow and green give a very short pulse its only very momentary incorrect in my book. I decided to take motor out and have a look inside . The hall sensors show no visible damage and lift out on a circuit board . I have decided to replace them and have ordered these https://www.ebay.co.uk/itm/6x-Bipolar-Hall-Effect-Sensor-41F-SS41-SH41-SS41F-Electric-Bike-Motor-Repair/281804272538?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 I sent a message to the seller and he has said these will be fine. I cannot decipher the markings on the sensor. Are these correct? I notice the speed sensor is totally different and is activated by a single magnet on hub cover. I am going the phone wisper tomorrow I dont suppose they can supply the circuit board complete with sensors .

Thanks vfr400 I disconnected all three hall sensors as suggested and motor does not run and the display shows a motor symbol. So I then tried connecting each hall sensor one at time . Each time I connect one the motor gives a kick when the throttle is opened . Don't know what that proves. maybe hall sensors are ok? Adrian from Wisper has been in touch and he is sure it is my controller that is the problem . So I have a controller and new cable on order. Time will tell.

Thanks i thought it was strange without hall sensors it should not run. I have checked voltages several times and these are results i get each time. When i say throttle the motor only runs at walk speed this is normal. Does walk mode not use hall sensors? I was speaking with my neighbour who has been running his ebike without speed info for a while . lack of speedo dosn't concern me if it never works again ,its just happened since my blow up. I would i have tested out the PAS voltages and the work as I would expect them. I think i will have to phone Wisper to discuss

I I have done some more voltage test Black to Red 4.26v This is correct Black to White 4.75v this voltage does not change state by turning wheel using throttle or turning by hand. This is incorrect behaviour. Black to Blue 4.75v drops to 2.14v when using hand throttle turning wheel by hand 0.02 up 4.47 several time for each turn of wheel.[Only when turning backwards?) this is correct behaviour i assume. Black to Yellow and Black to Green 0v no change using throttle or turning by hand . This is incorrect behavour. I assume that i have three hall sensors that have blown when the short occurred. I see several videos on YouTube about replacing them. The problem is trying to find the correct type of sensor . Has any one on this forum attempted this ? I still await contact from support at Wisper . I'm not sure if they will have a repair kit to cover this scenario. The motor seems to have SY3626RD474 printed on it . I cant find any info on this type of motor on the internet . Can anyone help?

I have had a look and the white wire is at 4.75v and does not change state as the wheel is turned. I have examined the six way connector and it appears that it is the red and black wires that have been burnt with contact with the motor phase wires. The white wire shows no burning. I cant understand how fitting a magnet and switch will work. If I should expect six pulses per turn one magnet and sensor will only produce one pulse per turn? What do the red and black wires do on that connector ? I wonder if red and black getting excessive voltage has damaged several components within the motor.

Thanks for your swift reply . I shall have a look tomorrow basically the motor wires were welded to the six way connector so your scenario makes sense. I have emailed Wisper as i feel such a catastrophic failure should not happen shortly after my warranty expires. Having said that my dealings with wisper have always been excellent.

I was out on my 905se which i have had for the last two and half years and found it to be superb. Suddenly i lost power the the display on the speedo shows o mph even on a fast downhill section the walk throttle and PAS produces no power. After a long 12 mile cycle home without power i decided to remove the cover from the controller. First thing I note is a strong burning smell . The three heavy wires to the motor have melted and also fused to the six way signal cable from the motor. I have cut the damaged cables back and inserted new cables using solder joints and crimps . I now find the throttle works the motor appears to have plenty of torque and turns. The speedo still shows 0 mph if i apply the brake the current on the display increases as i would expect. Turning the pedal produces no power. I have sent email to Wisper. My suspicion is the controller has been damaged or the sensors on the motor are damaged. Has anyone any suggestions which may indicate my next steps?

I live near Falkirk I have looked at kits but would still like to use it as a standard bike.I have a tow bar cycle rack and am quite happy if can pop it on back and drive to a flat off road route but having said that if I fit a kit and use bike without battery fitted will it change the way the bike behaves .? Another thought is buy a second hand bike and convert. I have recently retired and have a technical back ground so a kit is something I would consider. Suggestions for a good kit would helpfull?

I am considering buying my first electric bike and have been looking at this bike from Decathlon unfortunately it only seems to be available online. Does any one have any opinion on this bike ? I live near the local canals with lots cycle paths which are mainly on the flat but the route to them has a couple of long hills which play havoc with my knees . Once I am on the cycle paths i have no problem cycling 20- 25 miles on the flat its the last 2 miles home that is the problem My present bike is a specialised globe hybrid with 700c wheels which I find is well suited to me. Would a conversion kit be worth considering ? Any suggestions to any other bikes would be welcome my budget is £700 to £1000