Fiido d2s with d4s components

[thelarkbox]

Thanks for explaining the wiring, anyway there is no extra 3 wires. By the 3 wires beside the terminal connector was meaning 3 thick phase power wires. I just double checked the controller/motor wiring and there is 5 wires (black, blue, yellow, red and green) on terminal and 3 phase wires, so total 8 for d2s. Also I checked photos of d4s controller and there is one white wire extra compare to d2s controller. So 9 in total (black, blue, yellow, red, green and white[speed sensor?]). That mean the motors are not identical and with d4s controller and display connected to d2s motor it would run but no speed reading...CORRECT?

Possibly ?

Bellow is answer from Fiido support when I asked for both motors specs.

D4S motor: motor~20 "CZJB90TZ rear 36V 250W rear left inner outlet, disc brake OLD 137 6S thread 36H 13G black with one speed gauge, wire length 800mm, maximum speed 31km/h 9-core ordinary wire, phase wire 3C head, Hall 2 8-piece flange nut with rubber sleeve

D2S motor: 36V 16 inch high-speed integrated wheel motor, equipped with 6-speed flywheel, all sub black color, disc brake variable speed, imperial thread, 145mm on gear, load speed of 25 kilometers per hour, right outlet, with internal speed measurement, ordinary nine core wire length of 710mm (excluding wire stripping)

ER Probably?? This is just theory on my part not based on direct experience with speed sensors

My first stab at a solution would be to hack wire in the sensor from a $2-3 aliexpress bike computer as it will come with an easy to fix to a spoke magnet too tho it migbt be a reed switch?? (2 wire connection not 3x) (connect ground and signal to test a reed switch) the wheel may have more than 1 x speed sensor magnet so if it seems like your reading 1/2 actual speed with correct wheel size set try adding a 2nd magnet... 40% chance of success??

if the cheap git bodge fails google/utube hall effect sensors and do a kosher diy job, different hall sensors trigger under different conditions, coffee utube 10 mins you will get it..

 

[SOURLEMONJUICE]

Still sounds good to me.

I think the six speed flywheel means freewheel, and the other one is single speed.

If you can make sense of the wiring it should work.

They are both 6 speed, identical freewheel and handlebar shifter. Forgot to mention d4s has 20inch wheels and d2s 16inch wheels. Now I know d4s has one extra wire for speed sensor(?), so there will be probably issue with speed reading when use d4s components?

 

[saneagle]

They are both 6 speed, identical freewheel and handlebar shifter. Forgot to mention d4s has 20inch wheels and d2s 16inch wheels. Now I know d4s has one extra wire for speed sensor(?), so there will be probably issue with speed reading when use d4s components?

It's going to be fairly expensive to buy the D4S parts. Do you have a price? If it was my bike, I'd buy a standard controller and LCD that you know will work. You can buy a speed sensor at the same time in case you need it. A top of the range KT one would be about £80 -£90 with throttle, PAS and speed sensor, so that you can guarantee that it's plug and play if you don't like wiring; or about £50 for a cheaper type, like Brainpower. If you're trying to get a better riding experience, it's better to pay the extra for the KT because it gives you the throttle as a power boost and other useful features.

 

[Nealh]

KT all day long for me, for the money nothing comes close.

 

[SOURLEMONJUICE]

It's going to be fairly expensive to buy the D4S parts. Do you have a price? If it was my bike, I'd buy a standard controller and LCD that you know will work. You can buy a speed sensor at the same time in case you need it. A top of the range KT one would be about £80 -£90 with throttle, PAS and speed sensor, so that you can guarantee that it's plug and play if you don't like wiring; or about £50 for a cheaper type, like Brainpower. If you're trying to get a better riding experience, it's better to pay the extra for the KT because it gives you the throttle as a power boost and other useful features.

Hi, I did some research and yes KT will be the solution. Thanks

 

[SOURLEMONJUICE]

KT all day long for me, for the money nothing comes close.

Thanks for recommendation, I'll move to KT.

 

[SOURLEMONJUICE]

Now the question is, will the KT system somehow read the speed from 3 hall sensors? Or do I need the external speed sensor?

 

[saneagle]

Now the question is, will the KT system somehow read the speed from 3 hall sensors? Or do I need the external speed sensor?

Yes, it can get the speed signal from the hall sensors, but only when the motor is turning with power, so you won't see your fastest speed when going down your favourite hill.