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The belt tension is surprisingly low. In fact It's so low that you must clean out the threads of the tension screw and casing that it screws into, or you can set the torque driver off before the belt is even tight. What I am saying is that it is extremely easy to over tension the belt. However...

No, just put all the bits in a box and send it down. Rest assured you're not the first to do this :) Just put the PCB back into the case, to keep it protected.

No, just put all the bits in a box and send it down. Rest assured you're not the first to do this :) Just put the PCB back into the case, to keep it protected.

This will be an almost impossible fix for you at home. Unfortunately, the armature also holds the motor angle magnet, which is calibrated to the PCB. As the PCB is a "SMART" it cannot be simply swapped out with a gearbox as can be done on the Non smart gen 4. We can sell you any of the parts...

Just for info: If the crankarm is aluminium (aluminum) and you have ridden with it loose for a few miles, it can "stretch" and wear the isis splines inside the crankarm. This means that when you tighten the crankarm to specification the inner shoulder of the crankarm butts up against the end of...

Not really, these changes have been done over the last 4 years. However, anything ending -200 after the motors part number, or any motor carrying the new Brose name "YMESG" (Yamaha Motor eBike Systems GmbH) will have the latest parts installed.

Sorry for my late response. There have been a large number of changes since 2021 to 2026. An internal seal has been added to the drive side of the crankshaft. Planetary gear material has been changed. Ring gear material change. Small belt pulley material change. Large belt pulley material...

Sorry I missed you yesterday Irie, give me a shout when you pick your bikes up (y)

Basically, you've nailed it! The groove holds the grease to lube the seal and any grit that makes its way behind the seal gets trapped before making it into the bearing. (y)

To save any confusion, here are the fitting instructions with photos:

Thanks for the shout-out Ringer... Just so people know, 6 years ago we changed our name to eBike Motor Centre (y) :)

Yes, no problem. Just follow this link and it will tell you all you need to know about sending your motor to us. Our current turnaround is a lot less than 5 weeks too! eBike Motor Repair and Service

You will find our international partners page on our website, we have two partners in Germany, as well as many other countries too. https://www.ebikemotorcentre.com/partners

No, they can just fail. Out of the thousands of motors we see each year, I can assure you that this part can fail without prior intervention and no noticeable installation issues from the factory. We have never really bothered finding out why, but now I'm curious, I will see if I can find a...

No, if the bearing moves, the belt pulley will rub on the inside of the belt cover and makes a metallic scrapping noise. Even if the bearing moves only slightly and the pulley does not rub the belt cover, eventually this will cause the drive belt to fail, but none of this has anything to do with...

That is why we have partners all over Europe and the rest of the world: Where to find our Parts and Repair Centres Worldwide

This part is the torque sensor pick-up ring. It works by converting a resistance change to a voltage signal. More pedal force = more motor current. The only practical test you can do would be a continuity test, but this will not tell you anything more than the fact that you have a circuit. If...

I think you will need to I think you will need to post a photo of what you need. The language translation sounds like you are working on a radio! Take a close-up photo of the part and I will get you the information.

Unfo unfortunately you will have to be a little more accurate or descriptive with your descriptions. If you mean the wiring plugs under the printed circuit board (PCB) cover? They just clip in to the PCB. I'm not sure what you mean by "coil"? If you mean the electric motors armature (the...

If the If the plastic pick-up coil for the torque sensor fails you will get walk assist but no power assist. If the torque sensor fails, you will get no walk assist and no power assist. If the PCB is damaged and your repair has not worked, you will also get no walk and no power assist. It is...