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You may or may not get on very well with the Torque sensing PAS as it relies on the rider to exert effort for the power multiplying to work. In general those with COPD or severe lung issues a cadence/simple rotation pedal sensor and an added throttle is better, though these invariably mean a...

As far as I am concerned the only natural ride feeling with a bike is a push bike, not an assisted one with a motor providing the power.

The original controller (bottle battery) was a Lishui model, the new one a KT and you did correctly buy a KT lcd. What is unknown are the KT C parameter/settings so it might be likely that one may be a miss. Most Bafang's use a 5:1 gearing ratio x 16 or 18 winding magnets so P1 setting is...

I keep my LCD1 & 2 displays on the bikes and if I need to make any C changes, use my LCD3 fitted on another bike to change them. Once they are made I switch off disconnect and then reconnect the LCD1/2.

Battery wires are easiest to extend, though one can also buy 9 pin motor wire extensions though might be a bit too long.

GA cells are a poor choice for a higher current draw. The ES thread on life cycle ageing/testing put it well down the pecking order on to use.

Sounds like the bike is at a a dealer or bike repair shop, as the Op states the bike is in for repair. Probably doesn't know more then we do about the who, what, why or where.

If by that you one means the bike has seen a lot of standing rain, then it sounds like a likely culprit. Unless of course something else has occurred like the bike falling over or an off incident, the electronics don't often go wrong without a contributory factor.

No use spraying with WD. If water ingress is the issue because the bike has been left out in the rain then moisture may have got in and caused oxidisation/tracking between a pair of wire pins or contacts on a pcb, this shorting can cause the issue you are experiencing. The only way of knowing...

I dont't or can't understand why people start having issues esp with KT controllers, they are so easy not to get wrong. People seem to change/swap out items often for no good reason and spend money to try and overcome issues, then when the issue is still present decide to buy or change another...

Throw the led motor tester away as it doesn't give any voltage readouts except for lit led's sometimes, one is better spending that money on an equally good DVM and manually testing items that give a meaningful readout. The simple test that vfr mentions is more telling then the motor tester and...

Correct yes, LCD1 has no C parameter option. If the new controller had an incorrect setting one won't know without an LCD that can access the C parameters. With my LCD1 or 2, I simply plug in my LCD3 to make any changes.

They use CABbus so one simply can't use a generic charger hence one has no choice but to pay the asking price.

Controller or display wires/pcb shorting out is likely. Has the bike seen any rain lately or has the bike had any incident ?

I like some of the Pashly frame designs.

Magnet disc manufacture uses different materials , some are more flexible then others. It's not the first time we have seen pics of broken discs but I have yet to see one on any f my bikes break. End of the day as long as the disc's are replaced by the dealer there is little in trying to appoint...

4 years is quite good and capacity loss/range is expected. Wisper may offer to re- cell the case or one can use the excellent services of ebikebatteries.co.uk in N.London, either by phone or the battery re -cell contact page on the website. A re- cell by ebikebatteries will likely increase your...

Which PAS sensor/ disc are you using and is C1 set correctly ? C1 settings can be found after the P settings have finished, one holds the same two buttons again.

Nearly all parts are of eastern manufacture or ownership. British brands are mainly the smaller independents like Woosh, Wisper 7 Juicy etc,etc who design and spec there bikes and also the first two are producing them within their own production lines now.

Yes, Go Cylce high tech design and not cheap. Lightweight and quite desirable especially to T- leaves. Speaking of such there is brand new one on ebay for spares/repairs at £250 starting price, a very smelly rat I think.