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Was browsing Ebay and came across this item: 2X(Electric Bicycle Torque Sensing for Tongsheng Tsdz2 Mid Drive Motor S7M3) 4894847309060 | eBay Looks like just the stator of the torque sensor but the thing I noticed was that just two springs are supplied. The replacement torque sensor I received...

Thanks for that b42. If I use the throttle then I can hear the motor. Nothing with turning the pedals only. I thought having the bike on a stand would be convincing but I will give it a go once I rebuild the motor.

My Chinese friend asked me to send the video again as he didn't receive it. The video was taken with the tandem mounted on a work stand and me turning the pedals by hand. I got this reply. "hi friend Our technical department said that if there is a problem with the torque, it must be judged by...

Yes you could be right. We'll see what the boys(girls) in China think.

Fitted the replacement torque sensor and alas still no pedal assist. Got back to my friends in China and they asked for another video and the serial number of the replacement torque sensor. Sent them a video of the pedal assist not working and the throttle driving the motor but asked if they...

Have now heard back from Bollfit Bike store. They reckon the fault is with the Torque Sensor and have offered to send me a replacement if I pay the postage. I have accepted (£10.44) so will wait until the slow boat from China arrives. The Torque sensor looks like one of the more difficult...

Thanks for the advice. I had a first stab at making a video showing most of your points but it was too large to send even after compressing the files. I have now sent two videos, one "assist" and the other "walk". I'm not sure about the quality of the videos - Steven Spielberg I am not!

I got a reply from the supplier (BOLLFIT Ebike Store) requesting a video to show my problem? As somebody said perhaps a video of me at the top of a hill all red in the face and sweating because I don't have pedal assist.

I forgot to mention that the display does register speed and distance. When I first tried a wee pedal the magnet was in the wrong position and no speed was registered but I didn't see any error codes.

Thanks for the posts. The battery is new. I stuck my multimeter probes in the charging socket and got 41V. When I engaged "walk assist" the voltage fell to 39V then rose to about 40.5V. I tried pedalling and the voltage remained at 41V so no assist as expected. Thanks also for the links, I'll...

Tongsheng TSDZ2 kit with VLCD6 display fitted to Orbit tandem. Battery is Hailong 36V 13A. Unfortunately there is no pedal assist! Connected the throttle and the motor sprung into life, however still no pedal assist. So is it the torque sensor or the controller or can anyone suggest something...