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Welcome to the forum Dave , the forum has a few good members who can help you out plus the not so helpful. You will soon be able to sort out the wheat from the chaff.

Show us the display, does it have walk assist. If so activate walk assist to check if the motor works. Depress the down button and after a couple of secs the motor should work at 6km/h, if so then either the motor connection isn't all the way pushed home or the PAS sensor/magnet disc may have...

Maybe C1 setting is wrong ?

With the cotic even towing a heavy laden trailer on an ex rail line offroad route , with the KT I rarely use even PAS level 2 (4.5a) . PAS 1 gives me barely 3a but enough power for towing on a mixed firm made and part gravally surface, with the alfine 8 I have a 2 x chain wheel set up and use...

As in my #7, if an identical motor is sourced then swapping internals shouldn't be an issue, much the same with internal hub gears like the alfine 8 if it breaks. One doesn't need to change or rebuild wheels.

TSDZ2 magnet needs about 10mm clearance which is mentioned in the manual.

Once the face plate is removed one can simply extract the motor core and replace with the same from a new hub, no need to relace or rebuild a wheel if it is other wsie fine.

Have you tried one then , if not your views are very much invalid and not helpful to posters who know little. You will find that most on here with the knowledge will not put folks off with blinkered views , most will have experienced the various merits of drives including towing heavier loads .

For any wanting a hub bike they will do anything that a bike is required or asked of that a normal pdeal bike can do, but with more ease. I have hauled a trailer with my Cotic Road rat with a tiny front Bafang G370 hub and it copes with ease, the trailer with a 90kg paylaod is noticeable but...

I'm afraid saracen is very blinkered and has a total dislike of hub bikes, unless he has tried to use one for many years then his views as most will have sussed out are very lacking in any real world knowledge of them.

Kt's will only use KT display's and vice versa with LSW 's (lishui's), one may see a few parameters working but that is it . Invariably power will power up and maybe a PAS level may work but not much else. PAS sensor should work if wire sequence is correct.

Wire sequences there are 36 possible combo's. I have posted a chart many times so should be able to find in the search area.

This the type you need with no hall sensors, though this one may be a bit a larger then your one. With the KT you would need to buy a kt display as well. Ebike Sensorless Brushless Motor Controller DC 36V/48V 500W 9-FET 20A KT Square | eBay This one is 15a 6 mosfet from china seller. T06P...

Connector is old 3pin julet model for sensorles hubs, they are quite rare now. Look for an sensorless controller and display with 3 pin outs.

Building a bike for your sister d8veh ?

Which winding and AKM do you have , if the internal gearing isn't known one expects you will have to experiment with P1 settings. Try 130, 168, 211 . 130 = 8.1, 168 = 10.5, 211= 13.1 are some of the typical ratios used.

Highly unlikely air forks will be specced on an OEM EAPC, one will have to buy them and add them .

The viking bike is quite a generic desgn sold by a few resellers, one being Ideal world tv channel, tescos and a few others.

If you look on ebay one can buy the sensor/disc which has the two piece/ metal split ring disc so one doesn't need to remove the cranks to fit it.

One can buy them on ebay, amazon, aliexpress or any of the online china reseller shops. Sometimes one has to buy the whole PAS with the sensor, they aren't expensive to buy. Electric Bike Speed Sensor - Electric Bicycle Pedal 12 Magnets E-Bike PAS Syste 854008751422 | eBay Decathlon / B'Twin /...