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https://www.ebay.co.uk/itm/RockBros-Waterproof-MTB-Bike-Bicycle-Seat-Saddle-Bag-Cycling-Rear-Tail-Pack-New/263615098787?hash=item3d60af2fa3:g:t9cAAOSwiutZ5H38

Replacement controller but will happen again if over volted or polarity isn't right.

Stuttering is often due to wrong motor phase or hall sequence., being that these are all julet connected it may be possible that it is a production wiring error. C2 has 7 options so you could try each one to see if it improves the situation.

In all likely hood an lcd won't work with your controller, and mixing and matching is often incompatible. You will need to probably buy controller and lcd as a matching pair which have the correct data commands. Show us a pic of all the controller connectors.

The de. forum is good though needs Google to use as it translates the to English though sometimes you have to extrapolate the translation a little more.

Expensive but should just be a swap with correct wire sequence and connectors all the same. Its an OEM model so may have different wiring, connectors & programming if you knew the manufacturer you could try a std controller however it may not be as simple as plug and play.

Pull the motor cable connector a part and reconnect, ensure it is fully up to the line and arrows are aligned. If the controller was fried you wouldn't get any stuttering. Recheck the sensor wiring for polarity and order sequence. Remove battery disconnect everything and reinstall. These kits...

Check all connectors as well as occasionally a pin may back out a little or a bullet may not be crimped tightly enough. Wire checking/testing can be time consuming so write all the wiring down on paper and mark each test off as you go along so you don't get lost, also if you find one bad wire...

Probably a few causes likely that he has fried the controller, a combo of low cadence or too high a gear. Also being in the wrong pas level up hill may not help as well as this will also labour the drive unit. Multiple lipo's connected wrongly up in series will cause over volting and blow the...

Pic 1 & 2 found it, simples !!! A ball race cage.

Stripped the differential hub down today for a good degrease and clean. I'm trying to find a race for the old girl does anyone know it's proper name so I can try and find a replacement ? Some of the balls are loose and fall out as the ring is a bit distorted. Also looking for some pawls, I...

Chances are that there is a wire break causing an intermittent contact hence it stopped working when you replaced/moved the controller. Nothing needs power as you are only checking wire continuity via the multi meter using it's battery as the power source. You will need to carry out a check on...

http://www.ebikes.ca/learn/troubleshooting.html Above link for testing controller issues in PDF form. Good text and pics.

Batteries without an on/off switch does this

35E is apparently a so-so cell, 8a is about it's rating. 30Q, HG2 or VTC6/6A are the stand out cells for a 2P config.

You need to fish out the controller and show a pic of the wiring and any spare connectors. The controller is most likely found in the front of the battery compartment if rack mounted or in black box if frame mounted.

Website says 3 - 4 weeks so yours should be on the way soon. Packs are built to order to guarantee latest fresh cells. Give them a gee up to see what is happening.

Is that the Bosch drive Endeavour ?

Blimey :eek: it's a folding 700c as well. It will do a 3 mile commute the hub is a Mxus ( Decent brand) it may lack torque and oomph for very steep hills or long uphill drags, however one reviewer from hilly Bristol seems to think it's a ok. It is cheap and cheerful so as you say not much to...

You got it .