Bosch gen 4 noise

[MsO]

Out on me trek today lovely ride out in the sun I'm up around the 660 miles now motor is super smooth when pedalling but the motor noise when your not pedalling is definitely getting louder especially when you first put that pressure on the pedals if you do it quick stab on the pedals there is a loud clunk when the motor engages going down a local trail today downhill is sounded like a load of loose nuts rattling around hope Bosch can come up with some sort of cure for this

 

[Zimmerframe]

They have said they're working on this.

Internally I believe they have teams from three different divisions working on alternative solutions.

So far, they've only released details and images from the "Harmony Development Team" .

Apparently you zip tie this (which will be provided free) to your downtube and you can't hear the noise anymore.

 

[MsO]

The noise is a shame thou apart from that it's a bloody good motor

 

[GrahamPaul]

The noise is a shame thou apart from that it's a bloody good motor

I find that a really good cure to that noise is to forget to engage the derailleur clutch. The chain slaps drowns out everything...

 

[MsO]

Noise is definitely getting louder the more miles you do

 

[MsO]

Done another 30 miles today and starting to get pissed off with that Bosch motor shouldn't get that much noise from a nearly 5 grand bike

 

[MsO]

Spoke to bike shop about the noise from the Bosch gen 4 motor and I'm not the first person to complain about this but basically it looks like we have to put up with the noise from the motor as it's not broke so it's working as it should do nothing wrong with the bike so don't think you can get refund there if Bosch can't come up with some sort of fix for this they will have a lot of unhappy customers

 

[Doug Stampfer]

Earphones & mellow music may be a solution for you.

 

[MsO]

Heavy metal music more like ?

 

[GrahamPaul]

Heavy metal music more like ?

Thrash metal would probably suit better... ?

 

[Cdunn22]

I’ve bee

Out on me trek today lovely ride out in the sun I'm up around the 660 miles now motor is super smooth when pedalling but the motor noise when your not pedalling is definitely getting louder especially when you first put that pressure on the pedals if you do it quick stab on the pedals there is a loud clunk when the motor engages going down a local trail today downhill is sounded like a load of loose nuts rattling around hope Bosch can come up with some sort of cure for this

Out on me trek today lovely ride out in the sun I'm up around the 660 miles now motor is super smooth when pedalling but the motor noise when your not pedalling is definitely getting louder especially when you first put that pressure on the pedals if you do it quick stab on the pedals there is a loud clunk when the motor engages going down a local trail today downhill is sounded like a load of loose nuts rattling around hope Bosch can come up with some sort of cure for this

ive been lucky on the noise side of things but after 400miles I’ve got a fault code 503 on my Cube Stereo race 140 and motor isn’t going

 

[GrahamPaul]

I’ve bee


ive been lucky on the noise side of things but after 400miles I’ve got a fault code 503 on my Cube Stereo race 140 and motor isn’t going

I believe that's a sensor error. Does you bike have a spoke magnet or one attached to the rear hub?

If the former, make sure the magnet hasn't slipped or turned out of alignment with the sensor.

If the latter, check to see whether the magnet is still there. A few have gone missing in action to the extent that folks are sticking them in place with superglue. You might be lucky and it's flipped out of the holder and has attached itself somewhere else on the wheel.

 

[Cdunn22]

Thanks mate for your advice but I’ve tried all that and it’s not registering

 

[Zimmerframe]

Can anyone tell me how this is going to work when I swap to sbarro hubless rims ?

 

[GrahamPaul]

Thanks mate for your advice but I’ve tried all that and it’s not registering

Pity. That's usually the cure. Could be a loose wire from the sensor into the motor.

 

[Cdunn22]

Thanks I will try that??

 

[GrahamPaul]

Can anyone tell me how this is going to work when I swap to sbarro hubless rims ?

You're going to have to push those pedals a bit harder... ?

Or get a Bafang with thumb operated throttle... ?

 

[Zimmerframe]

You're going to have to push those pedals a bit harder... ?

Or get a Bafang with thumb operated throttle... ?

I thought it was fairly obvious by now that I didn't have opposable thumbs .

 

[MsO]

Well all that bloody noise coming from my bike turned out to be the rear cassette slightly loose took it off cleaned it up put it back on and now a lovely silent bike going over the bumps couldn't believe the amount off noise it made ?

 

[GrahamPaul]

Well all that bloody noise coming from my bike turned out to be the rear cassette slightly loose took it off cleaned it up put it back on and now a lovely silent bike going over the bumps couldn't believe the amount off noise it made ?

Glad to hear(!) you've cleared that up easily.

Now go enjoy your bike! ?‍?

 

[GrahamPaul]

Thanks I will try that??

Not sure if you'd found this link in one of the previous posts. (Sorry, I've forgotten who posted it, but he did me a huge favour).

The manual is only of interest from page 112 onwards. It also shows you the plug locations on page 114.

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