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I do have some slightly bad news for you guys though. We have been logging lots of faults with the Gen 4's whilst constantly evaluating the failures we're seeing. We could not workout why the left hand crankshaft bearing keeps failing and the right hand does not (well, not so much anyway). It...

Because of the outlay needed to support a motor, especially one with a large number of different models, we can't afford to do this until we have the demand. Unfortunately, the demand from Bafang owners is just not there yet. Rest assured, as soon as we start getting enough enquiries, we will...

These are the two tools we use to do this job several times a day. I'm not recommending to use Snap-On but cheaper equivalents can be found.

The genuine Bosch picture does show standard circlips, but the genuine kit will contain C-clips.

We currently repair: Bosch Brose Mahle Impulse Panasonic Yamaha (Inc Giant) We do support Shimano with bearings, but no longer service the motors due to Shimano refusing to speak to us. Please campaign to Shimano to help us with software support because if they help us a little, we can help you...

Oop's, unfortunately, that is the perfect sign for the beginning of the end for that bearing!... You know where we are if you need us :)

A car rack is fine, just wrap a plastic bag or something around the motor if the roads are wet. It's not direct water pressure that you are protecting from, it's the air pressure forcing the spray in from all angles, so the roof won't be any better. The bag does not need to be tight or sealed...

We have done a few Rocky Mountain motors, but they're not too common in the UK. Powerful motor, but heavy and a little over complex, seem generally strong though.

Great question. Most motors are hermetically sealed, once water gets in it does not get out again. Usually, the water drops to the bottom of the motor and if warmed, just condenses and tends to collect on the PCB as this is usually a free standing isolated part inside the motor that tends to be...

And there you go... That's all you need to do to help your motor live its best life. Top 3 killers: Pressure washer / Direct jet hose at the crank Deep water fording Using a car rack on wet roads without covering the motor

There are now hundreds of motors out there, but they have to reach a certain level before the amount of work you have to put in to support them becomes economically viable. We do like at least a nod from the manufacturers, but sadly the only main manufacturer that will not acknowledge us in the...

Spray your motor with some sort of cleaner that releases mud, like Muck-off, truck wash, Motorcycle cleaner etc. then use a soft brush to loosen the dirt, followed by a hose on sprinkler setting. If mud has built up badly, rake it out first, the truck wash will do the rest.

My best tip would be to leave it alone! The Bosch Gen 4 is a very difficult motor to repair. Be very carful of the crankshaft, if you pull it or lift it before removing the torque sensor screw or armature and transfer gears, you will break the torque sensor. You will also struggle to remove and...

If both motors are "smart" system, they can be swapped but then the bike would have to be connected to Bosch software to let the controller know it now has a new motor and to talk to it. I am not sure whether you will have a problem at this point, if the Bosch software recognises that your bike...

Some motors yes, some no. To be honest, most new motors of any make, the PCB is wrapped around the motor to fit it all in and this means it goes from top to bottom. This is just another consequence of everyone wanting smaller motors.

No problem, just follow this link and talk to our man in the US. His name is Michael: Where To Buy - eBike Motor Centre (Performance Line Bearings)

We do sell the bearing kits for the EP8, you can find them here if you need anything: Shimano EP8 - eBike Motor Centre

In our upgrade kits we use sprag bearings with larger sprags and thicker cages. Although these do suffer shocks better, they are still not indestructible. Unfortunately, the forces that can be generated through a crash or big pedal strike are enormous and basically, something has to give! Saying...

If you did send it to eBike Motor Repair in Tennessee, you would still get a 12 month warranty from Michael, plus you would get a motor that you probably wouldn't have to walk home with one day. There is no "latest updated" version of the motor that fits your bike, so you will get the same motor...

Motor run-on can be caused by a failing sprag clutch bearing that is jamming and/or a crankshaft that feels tight to turn backwards, caused by the right hand needle roller bearing failing.