German Wisper 905SE wiring fault

[jimmyengland1000]

Hi everyone

As you may have seen, I have posted several messages recently concerning the German Wisper 905SE which I bought last week. It is one imported by Frank (Aldby) and sold to the person I bought it from.

In another thread, I mentioned that I wasn't happy about the jerkiness of the power delivery in pedelec mode and that the throttle appeared lacklustre and inferior to my old 905e. Frank responded and explained what the buttons are for. Using the green de-restrict button made the bike a bit faster but still jerky pedelec and weak throttle compared to the 905E which I used to have.

I found out today that the Wisper 905SE's from Germany have a wiring fault. David Miall of Wisper was tremendously helpful (on a used German bike not sold by him here in the UK, by the way...) and he passed on my problem to Dick Lai in China. Dick responded today with an e-mail with two photos and a circuit diagram for me to check.

The pedal assist circuit is incorrect on the German bikes.

Remove the cover on the frame and remove the controller (leaving the wires connected). You will find a connector block with a yellow wire, a brown wire and a black wire. This is the pedal assist circuit. One of these three wires has another small female block connector on it (which goes to a switch somewhere).The yellow wire is the wire that should have this block connector to the switch. However on many, if not all, of the German 905SE's, this connector block has been put on the brown or the black wire by mistake. On mine it was on the brown wire. It may not be just the German ones.......?

To remedy the fault, you need to remove this female block connector if it's fitted to the black or brown wire, then join the two ends of the black or brown wire together. Then, snip the yellow wire and join one end of the wire to one prong of the block connector and the other end to the other prong. Then replace the male block connector from the switch into the now re-sited female connector. Make sure all joins are insulated with tape.

The above is a bit long-winded but a picture paints a thousand words. I've added two photos of how it should look and I've now managed to add a scan of the circuit diagram.

The result of the above repair (which took me about 15 minutes total) is an amazing change in the performance of the bike. The pedelec mode is now wonderfully smooth right up to top speed and the throttle is about 50% more powerful. My 905SE now delivers power in pedelec mode and throttle mode just like my old 905e did, except better. PROBLEM CURED thanks to David Miall taking the time to pass on my problem and to Dick Lai for responding so clearly and so quickly. Dick says he told Dominic in Germany about this but Dominic didn't correct the wiring fault in the bikes before selling them.

I'd be interested to know if any other 905SE owners have the same problem..... It's nice to know it wasn't senility or my imagination when I thought the bike wasn;t functioning properly!

 

[Mandy]

Hi everyone

As you may have seen, I have posted several messages recently concerning the German Wisper 905SE which I bought last week. It is one imported by Frank (Aldby) and sold to the person I bought it from.

In another thread, I mentioned that I wasn't happy about the jerkiness of the power delivery in pedelec mode and that the throttle appeared lacklustre and inferior to my old 905e. Frank responded and explained what the buttons are for. Using the green de-restrict button made the bike a bit faster but still jerky pedelec and weak throttle compared to the 905E which I used to have.

I found out today that the Wisper 905SE's from Germany have a wiring fault. David Miall of Wisper was tremendously helpful (on a used German bike not sold by him here in the UK, by the way...) and he passed on my problem to Dick Lai in China. Dick responded today with an e-mail with two photos and a circuit diagram for me to check.

The pedal assist circuit is incorrect on the German bikes.

Remove the cover on the frame and remove the controller (leaving the wires connected). You will find a connector block with a yellow wire, a brown wire and a black wire. This is the pedal assist circuit. One of these three wires has another small female block connector on it (which goes to a switch somewhere).The yellow wire is the wire that should have this block connector to the switch. However on many, if not all, of the German 905SE's, this connector block has been put on the brown or the black wire by mistake. On mine it was on the brown wire. It may not be just the German ones.......?

To remedy the fault, you need to remove this female block connector if it's fitted to the black or brown wire, then join the two ends of the black or brown wire together. Then, snip the yellow wire and join one end of the wire to one prong of the block connector and the other end to the other prong. Then replace the male block connector from the switch into the now re-sited female connector. Make sure all joins are insulated with tape.

The above is a bit long-winded but a picture paints a thousand words. I've added two photos of how it should look but I can't load the circuit diagram as it's too big. Please e-mail me if you want it.

The result of the above repair (which took me about 15 minutes total) is an amazing change in the performance of the bike. The pedelec mode is now wonderfully smooth right up to top speed and the throttle is about 50% more powerful. My 905SE now delivers power in pedelec mode and throttle mode just like my old 905e did, except better. PROBLEM CURED thanks to David Miall taking the time to pass on my problem and to Dick Lai for responding so clearly and so quickly. Dick says he told Dominic in Germany about this but Dominic didn't correct the wiring fault in the bikes before selling them.

I'd be interested to know if any other 905SE owners have the same problem..... It's nice to know it wasn't senility or my imagination when I thought the bike wasn;t functioning properly!

Hi Jimmy
Thanks for that info as that may have been the case with my jerkiness and not a cold battery in an earlier post but seems to have been fine since but not as fast?
No jerkiness and quite smooth.
I will have to check out my wiring as I am sure as I have posted previously that I haven't got it as fast as I did when I first got it but wonder whether it should have been rubbish from the beginning? It went super fast at first!!
I will bring it indoors and have the family look at it, LOL!
Will check out your links too.
Regards
Mandy

 

[Mandy]

pedal assist?

Hi Jimmy

I replied to your post already and could well be of assistance to me to get the wiring right. But you have stated the pedal assist mode?
However, I don't use the pedal assist mode but just pedal in the motor only mode as I did with my Powabyke.
Okay, this maybe cheating but there are no cut outs this way and don't know how this bike will respond with battery use etc but the Powabyke battery lasted for 3 years and I never used pedal assist! Ever! I just pedalled it when I wanted more oomph and that was normally all the way
I was told on purchase that the battery would last around a year but charged it up after every journey but that was lead acid.

I have probably been using this bike completely wrong as by pressing the green button one way caused jerkiness and in the the other none.
Afterall you cannot tell if depressed or not can you? It is very unclear.

I think I may email David for assitance in this tomorrow as off to bed.
Thankfully I don't have to be up until ten but found this a little worrying so stayed up later than normal.

Regards

Mandy

 

[frank9755]

Thanks Jimmy,

Well done!
Also thanks, Dick and David.
I look forward to trying this on my bike!

Frank

 

[jimmyengland1000]

However, I don't use the pedal assist mode but just pedal in the motor only mode as I did with my Powabyke.

Hi Mandy. On my 905E, I never used it in any other mode than pedelec. I hardly ever twisted the throttle. In fact, for me, I find not having to focus on using a twistgrip far more relaxing. I just pedal and the motor assists automatically. I understand that using the bike this way is actually better for the battery in fact as the throttle only mode drains power rapidly and batteries don't like this.

You've mentioned "cut-outs" in several of your postings. I never had one of those ever on my 905E, even struggling up a hill against a headwind. I regularly did 26 miles in one go... on the flat, up long slow hills, up one fairly steep hill and it never cut out. That's using the pedelec mode though and occasionally twisting the throttle too on really steep bits. I'm wondering whether your bike is wired correctly, since you mention the jerkiness etc. The problem I had was wondering if my perception of things was wrong... like you've said it seemed jerky but now it isn't but it might be slower etc etc. I went through all of that with the 905SE and I think it's more a case of just getting used to things and perceiving them differently. In fact, I wondered whether my old 905e was as smooth as I remembered!! Of course, now the SE is fixed, I realise my memory was right but it was a close thing!

I'd have a look at your wiring anyway. Even though you use your throttle only (try the other way though..), it would make a difference. My throttle only mode is about 50% more powerful after I corrected the wiring fault. I think if the German ones had a fault, it's possible that others did to. Is yours a German one?

 

[tgame]

My 905SE now delivers power in pedelec mode and throttle mode just like my old 905e did, except better.

Great news, Jimmy. Happy pedelec moding!

 

[jimmyengland1000]

Hi Tony. I'm really pleased re my bike! First, my waiting about for the other bike, then, when I buy another bike, it doesn't work properly. I began to think it was me and that I ought to pack in. I'm about to go out on the Wisper now. I only had time for a couple of miles yesterday after fixing the fault but I'm going for a long run now..... wish me luck!

 

[frank9755]

Mine was on the brown wire too! I've just changed it over as per the instructions. A bit of a fiddly job as on mine there was not much slack wire to play with.

I've not tested it properly yet, as my tyre is off while I finish fixing and tightening broken spokes, but I can't wait to give it a proper ride. I thought it was a decent enough bike before this but more power and proper working pedelec too will make it something else altogether!

Thanks again, Jimmy for your detective work, and to David and Dick at Wisper for their help. So much more helpful than this!

Frank

 

[jimmyengland1000]

Hi Frank. I reckon you will notice a big difference when you put your wheel back on. I've been out on mine again today and it's excellent. You'll not fail to notice the difference, especially in the pedelec mode.

The reply from Doug in your posting doesn't make any sense at all. I don't want to be unkind but it's just a kind of techno-babble nonsense. Other postings in the same thread are very difficult to believe... eg "The German bikes were as you know made to a much lower specification on the insistance if the German distributor. We would never sell this quality in the UK"

In fact, the answer should have been "our Chinese manufacturer used a batch of bought-in controllers which had a small wiring fault. Many of these bikes were sent from the UK to Germany and they are being sold from there. It's simple to fix the problem. Here's a wiring diagram and a few simple instructions"..... then you wouldn't have had to tape your throttle and have months of jerky, erratic pedelec etc etc.

No doubt you will update us all once you get your wheel back on?

 

[Mandy]

Hi Mandy. On my 905E, I never used it in any other mode than pedelec. I hardly ever twisted the throttle. In fact, for me, I find not having to focus on using a twistgrip far more relaxing. I just pedal and the motor assists automatically. I understand that using the bike this way is actually better for the battery in fact as the throttle only mode drains power rapidly and batteries don't like this.

You've mentioned "cut-outs" in several of your postings. I never had one of those ever on my 905E, even struggling up a hill against a headwind. I regularly did 26 miles in one go... on the flat, up long slow hills, up one fairly steep hill and it never cut out. That's using the pedelec mode though and occasionally twisting the throttle too on really steep bits. I'm wondering whether your bike is wired correctly, since you mention the jerkiness etc. The problem I had was wondering if my perception of things was wrong... like you've said it seemed jerky but now it isn't but it might be slower etc etc. I went through all of that with the 905SE and I think it's more a case of just getting used to things and perceiving them differently. In fact, I wondered whether my old 905e was as smooth as I remembered!! Of course, now the SE is fixed, I realise my memory was right but it was a close thing!

I'd have a look at your wiring anyway. Even though you use your throttle only (try the other way though..), it would make a difference. My throttle only mode is about 50% more powerful after I corrected the wiring fault. I think if the German ones had a fault, it's possible that others did to. Is yours a German one?

Hi Jimmy

Thanks for your help and yes it is the German one bought directly from Frank and Dominic in Germany.
This could explain some of my problems definitely as you have said I don't seem to be going quite so quick as I did when I bought it and I did have that cut out problem on one trip but think the cold didn't help on that one and had not kept my charge up on the battery, it has been better in that respect. However, it may have been due to the wiring problem and I will certainly let you know but not till after the weekend as won't really have the light to have a look due to work and time. I also will be more comfortable having some help from the clan due to the wire snipping

I use the throttle mode due to having a back problem and pedal also in this mode when I can. On good days I pedal a lot and on bad I don't pedal at all and try and concentrate on missing those oh so painful bumps, lol! I wouldn't be able to cope very well with having to pedal as I tried this with my powabyke on purchase and it didn't work in my case which is a shame.

I hope you are enjoying your SE to it's full now and hope I will after next weekend .

Thanks Again for all the input and I will let you know how it go's

Mandy

 

[jimmyengland1000]

I think you'll find it's the wiring thing. I used my 905e in all sorts of cold and never had the cutouts you mentioned...... let me know how you get on!

 

[jimmyengland1000]

my tyre is off while I finish fixing and tightening broken spokes

By the way Frank.... where do you get your spokes from?? I'll probably need some....

 

[Mandy]

Mine was on the brown wire too! I've just changed it over as per the instructions. A bit of a fiddly job as on mine there was not much slack wire to play with.

I've not tested it properly yet, as my tyre is off while I finish fixing and tightening broken spokes, but I can't wait to give it a proper ride. I thought it was a decent enough bike before this but more power and proper working pedelec too will make it something else altogether!

Thanks again, Jimmy for your detective work, and to David and Dick at Wisper for their help. So much more helpful than this!

Frank

Good Point there Frank

I like you thought it was a decent enough bike Frank

However, after more thought and after mentioning pressing the green button in previous posts and thinking it was pedal assist? even though in the power only mode? because this is what it felt like, this would certainly answer my confusion on this one.

Bet mine is on the brown wire too

Thanks to Jimmy and his gut instinct and David and his contacts at Wisper, hopefully we will all be sorted.

Regards

Mandy

 

[Spannerman]

Mandy, please let us all know how you get on with the wiring mods,

 

[jimmyengland1000]

To clarify the button thing....

The red button on the left grip turns on and off the pedelec mode. The green button turns on and off the power limiter. The red button on the right turns the throttle on and off.

I removed the speedo and battery level gauge on mine. The wiring diagram shows which block terminal to disconnect. I found both of them to be useless.

I'm also thinking of bypassing the green override switch so that it's on all the time and therefore cannot be accidentally turned off (easily done). I'll probably do the same with the red pedelec on/off switch. On my old 905e (yawn... I can hear you all) there was no pedelec on/off switch and, on the odd occasion where I wanted to ride the bike with no pedelec assistance (eg when I knew the battery was getting low), I just switched the main key off.

I keep catching the left buttons with my hand. I can't imagine not wanting the pedelec or wanting to ride the bike with the speed limited

 

[Mandy]

Mandy, please let us all know how you get on with the wiring mods,

I will let the others know, however not yourself.
Please do not bother me again on this forum or try and discredit me to other users.
You and I both know that I am not stupid when it comes to machinery or electrics as it was me who taught you how to set a CNC DAC lathe in order that you may go to Australia and teach them and it was also me that wrote and designed the fault finder for you and our comrades in OZ which was relied upon so much.
It was also me that fixed the blocker machine after 2 1/2 hours of bringing a dept (not my dept) to a halt where you 4 setters and the maintenance guys could not fix it
Amongst many many other things of which you are aware of.

Please do not persist in posting on this site or any others in order to discredit me as I do not deserve it. If you have any personal issues please email me directly and refrain from sending me nasty PM'S
You do not own an electric bike and you do not need assistance on this forum so please return to your own postings on your motor bike forum of which I would never dream of "stalking" you in. After all you even refused to try my SE, so you haven't even ridden one.

I will not be responding further to any of your posts and refuse to be drawn into what is obviously an imature way to take a pop at me. I just wanted to clarify a few things with the members here in order that they may further assist me as they have done in the past.

I am now off to bed very late at 2.20am due to you.

Sorry everyone

Mandy

 

[jimmyengland1000]

This forum is not the correct place to be airing this kind of thing in public. It's supposed to be about electric bikes, not interpersonal issues. I am not at all interested in your personal relationships, Mandy, and I doubt that anyone else really wants to read all that. You have used a public forum to send a private message about some sort of relationship thing and I would refrain from doing that again in future.

In fact, Spannerman's posting didn't discredit you at all, publicly (regardless of what it means to you privately) and did not therefore warrant a public recounting of your private life, something which I'm sure most people don't want to read anyway.

 

[frank9755]

By the way Frank.... where do you get your spokes from?? I'll probably need some....

SJS - see here

Frank

 

[Spannerman]

In fact, Spannerman's posting didn't discredit you at all, publicly (regardless of what it means to you privately) and did not therefore warrant a public recounting of your private life, something which I'm sure most people don't want to read anyway.

Thank you, as far as I was aware this is a Public Forum aimed at anyone with an interest in Electric Bikes. My interest centred around maintenance and the remedying of out of the box problems associated with a German 905SE. As was eloquently stated its not even my damn bike .

It seemed logical to me that as the unpaid personal Wisper Technician I browsed this Forum and looked at the information available rather than have a second hand verbal translation. In fact I decided to become a member only yesterday as I was unable to look at pictures posted of the possible 905SE wiring fault as a non member.

and what the hell am I going to do with the Shimano Brake caliper and disc which I bought yesterday now......

Thats gratitude for you.

 

[flecc]

and what the hell am I going to do with the Shimano Brake caliper and disc which I bought yesterday now......

Thats gratitude for you.

Thanks for the explanation Spannerman, but the above part is about a private relationship of no concern to members.

These postings have been referred to the site administrator.
.