Avinox M2s rattle

[SandroRiz]

Even if it were written in Arial 40 on the website, it wouldn’t change much; I argued with support for a month asking why my Fox 36 was a 2026 model while the website and newsletters say it’s a 2027.

After dozens of emails and escalations, the bottom line was: “Take it up with Fox or just keep it as it is!”

PS, for statistics: PX pro, 10 rides / 400 km: no rattle at all.

 

[GeorgesEBike]

After spending time on a few different motors lately, I figured I’d post my personal motor rattle rankings. This is purely based on what I can hear while riding rough terrain, descending, and general trail chatter. Scale is 1–10 with 10 being the loudest rattle.

Bosch Gen 4 Race = 10/10
Bosch Gen 5 = 1/10
Avinox M1 = 6/10
Avinox M2S = 3/10

The Bosch Gen 5 honestly surprised me. I could still hear a tiny bit of rattle here and there, but compared to the Gen 4 Race it’s basically night and day. Huge improvement.

The Avinox motors sit somewhere in the middle for me. The M1 had noticeable rattle on chunkier terrain, while the M2S seemed much more controlled and quieter overall.

Curious what everyone else is experiencing, especially long-term once these motors get more miles on them. Motor rattle probably won’t stop me from buying a bike, but on quieter rides it definitely stands out.

This is riding chunky Lake Tahoe terrain. Riding in Santa Cruz, CA none of the bikes rattle that much at all because of the loamy (amazing) dirt.

 

[Thomas46]

Here is a video of the rattle, by holding the pedal & moving the chain can replicate it

I expierienced the exact same rattle on a mondraker zendit test bike.

 

[Brawwp]

it may not have been explicitly stated, but definitely suggested that it would be pretty silent. Definitely a bummer

 

[501AM]

"So this is our like top-of-the-line product where you can see that we worked on reducing and actually eliminating the rattle sound when you go downhill. And for that we have this dual mesh system here that you can see."

1:18 in the video:

 

[Bike Gorilla]

"So this is our like top-of-the-line product where you can see that we worked on reducing and actually eliminating the rattle sound when you go downhill. And for that we have this dual mesh system here that you can see."

1:18 in the video:

@Rob209 there’s your evidence. Go get “em

 

[Fexn]

Hi together my M2 S is also rattling since it started suddenly after around 300 km and is getting slightly worse now at around 450 km. Additionally the humming sound is getting a little louder and kind of scratchy . Bike is around two weeks old. The rattle is clearly coming from inside of the motor and it’s the same as in the video you can produce it by moving the chain or the chain.

 

[Robson]

Annoying news. I've just order a Px pro. @Amflow_Support do you have any input?

 

[Adyzakydany]

@Amflow_Support any advice on this? I know two people with Zendit and one with a Velduro in my riding group who are all having the same issue? The motor was initially quiet, and now its as rattly as a bosch Gen 4, i have a Velduro Rogue on order and am now thinking about cancelling it, currently ride a Bosch Gen 5 motor which is dead silent, i don't want to go backwards with a noisier motor hence why I held out for the M2S. @Velduro Global HQ @Velduro UK anything you guys are aware of?

 

[roQer]

@Amflow_Support any advice on this? I know two people with Zendit and one with a Velduro in my riding group who are all having the same issue? The motor was initially quiet, and now its as rattly as a bosch Gen 4, i have a Velduro Rogue on order and am now thinking about cancelling it, currently ride a Bosch Gen 5 motor which is dead silent, i don't want to go backwards with a noisier motor hence why I held out for the M2S. @Velduro Global HQ @Velduro UK anything you guys are aware of?

Are you really expecting they are going to tell you that the motor starts to rattle?

 

[Adyzakydany]

Are you really expecting they are going to tell you that the motor starts to rattle?

Why are they on this forum then? There is clearly an issue with the M2S motors, we were told they will be virtually silent, and 3 that I know were silent, and now are as noisy as Bosch Gen 4.

 

[Iacari]

The rattle problem of Bosch Gen 4 was, in my opinion, some play developing between the main gear clutch bearing and the output shaft due to lack of sufficient hardening of the shaft.
Who knows if it will be the same on MS2?

 

[sethimus]

Even if it were written in Arial 40 on the website, it wouldn’t change much; I argued with support for a month asking why my Fox 36 was a 2026 model while the website and newsletters say it’s a 2027.

most brands reserve the right to change specs without any notice

 

[BikeBert]

@Amflow_Support any advice on this? I know two people with Zendit and one with a Velduro in my riding group who are all having the same issue? @Velduro Global HQ @Velduro UK anything you guys are aware of?

 

[BikeBert]

Why are they on this forum then? There is clearly an issue with the M2S motors, we were told they will be virtually silent, and 3 that I know were silent, and now are as noisy as Bosch Gen 4.

They're here interested in selling and promoting with influencers and paid reviews. But as soon as there's a problem, they just ignore it.

I truly hope this issue is related to a certain batch and not another experiment on the customers.

Attention: if you're a biker dealing with rattle in Avinox M2S, please speak up and share your experience. It's the only way we'll get them to listen.

 

[J_A_N_G]

When I saw the plastic(probably delrin material)mesh gear for the 1st time, my initial thought was 》Wow great idea, but why so thin? It looks like maybe only 3-4mm thick. How is the durability going to be, Is is going to last or will it need replacements after a while. Then I thought, well probably they did some testing and got to a conclusion it's fine.
View attachment 184232

Exactly my thoughts 3 weeks ago

J

Post in thread 'MS2 vs M2 Motor Rattle and other Intangibles'

Apr 21, 2026

Among other things, that additional spring loaded mesh gear setup with the M2S banished the one of the chief complaints of the the M1.​

Is this thin black second gear made of plastic ?

How durable is it ?

Will the rattle return once it is worn out ?

• J_A_N_G

 

[Suns_PSD]

They're here interested in selling and promoting with influencers and paid reviews. But as soon as there's a problem, they just ignore it.

I truly hope this issue is related to a certain batch and not another experiment on the customers.

Attention: if you're a biker dealing with rattle in Avinox M2S, please speak up and share your experience. It's the only way we'll get them to listen.

And it has been a HIGHLY successful advert campaign, with many e-bikers believing that the Avinox is the only motor system worthy of consideration. As a glaring example, there is a guy spouting off in another thread that if you buy an Avinox with any battery besides the 700wh, you are buying out of date crap. He even believes that the 700wh battery has more energy than the 800wh battery!

Anyways, the M1 was inefficient and rattled, now the M2s fixed the inefficiency and delayed the rattle. Both the M1 & M2s still need the weight and expense of chain ring protection added which negates any weight advantage. It's party trick is it's not actually a Class 1 e-bike motor, doubling the legal power limits and doing about the same to the max speed for Class 1.

As far as getting Avinox to do something about the rattle, that would require a redesign of the motor. That's not going to happen for another 18-36 months. No one is getting a warranty replacement over a rattle simply because the replacement would eventually do the same thing as its inherent to the design.

For the record, I still think the Avinox is an amazing motor system. It just did not make everything else obsolete.

The Avinox, the Mahle, the Bosch, the TQ, the newest Levo & the Maxon are the top motor systems imo and all have Pros and Cons. The bike the motor system resides in is still the largest factor.

 

[SandroRiz]

View attachment 184311View attachment 184312
most brands reserve the right to change specs without any notice

Glad they have listen to me... they correct the website removing 2027

 

[notaninfluencer]

I won’t bother going through all of the reviews for the motor, but the ones I’ve watched, the reviewers have all said it’s silent on the descents, which isn’t the case for all the owners it seems.

maybe because they were paid to review it. I didnt ride it long enough to hear a ratlle.

 

[Suns_PSD]

maybe because they were paid to review it. I didnt ride it long enough to hear a ratlle.

Or they are given 'ringer' motors. This used to be common in MX bike reviews.

For example, all M1 reviews eventually acknowledged rattle, yet when Francis of e-mtb review received his, he says it was always completely quiet, and I believe him. It's likely that Avinox provided him with a test bike that has some internal upgrades. Could have been blueprinted gears or the like.

 

[nowayfra]

As far as getting Avinox to do something about the rattle, that would require a redesign of the motor.

There wouldn't be the need to reinvent the motor, they could just implement a cage damper for the outer sprag clutch like the Bosch Gen 5 has. This thing doesn't need much room and its the only method for making the motor rattle free imho.

 

[Bomble]

This sort of thing is my issue with the stealthy “give every YouTuber a free Amflow” campaign. They all get a nice free bike to keep them quiet and onside but Joe Public has to deal with any hidden issues on the bike he/ she has bought with their own cash.
I’m surprised that legally they don’t have to declare it as a “paid promotion” if they receive a free bike to keep.

 

[Adyzakydany]

maybe @Rob Rides EMTB can chime in, he's had a leg over a bike with this very motor

 

[Suns_PSD]

This sort of thing is my issue with the stealthy “give every YouTuber a free Amflow” campaign. They all get a nice free bike to keep them quiet and onside but Joe Public has to deal with any hidden issues on the bike he/ she has bought with their own cash.
I’m surprised that legally they don’t have to declare it as a “paid promotion” if they receive a free bike to keep.

The issue isn't whether they get to keep the bike or not, and I suspect that most don't.

They get a constant stream of bikes to 'test' but more importantly, this constant stream of the hottest new bikes to test drives viewership of their Utube channels, which is how they actually get paid to live the influencer lifestyle. That viewership also drives sponsorships (phone holders, tires, gear, etc.) and so forth.

 

[Kr1s]

：哎呀：Does everyone have this situation? I have already talked to the person in charge and he said it was just an isolated case and is currently being investigated at the factory.

 

[Highland Wheels]

And it has been a HIGHLY successful advert campaign, with many e-bikers believing that the Avinox is the only motor system worthy of consideration. As a glaring example, there is a guy spouting off in another thread that if you buy an Avinox with any battery besides the 700wh, you are buying out of date crap. He even believes that the 700wh battery has more energy than the 800wh battery!

Anyways, the M1 was inefficient and rattled, now the M2s fixed the inefficiency and delayed the rattle. Both the M1 & M2s still need the weight and expense of chain ring protection added which negates any weight advantage. It's party trick is it's not actually a Class 1 e-bike motor, doubling the legal power limits and doing about the same to the max speed for Class 1.

As far as getting Avinox to do something about the rattle, that would require a redesign of the motor. That's not going to happen for another 18-36 months. No one is getting a warranty replacement over a rattle simply because the replacement would eventually do the same thing as its inherent to the design.

For the record, I still think the Avinox is an amazing motor system. It just did not make everything else obsolete.

The Avinox, the Mahle, the Bosch, the TQ, the newest Levo & the Maxon are the top motor systems imo and all have Pros and Cons. The bike the motor system resides in is still the largest factor.

Can you stop going on about the M1 being inefficient ffs when you have zero self experience with anything Avinox it really isn't in the real world.

 

[Paulquattro]

Please keep this thread on topic. We are discussing avinox m2s rattle. Not batteries from other brands, neither mtb's build quality.

Who made you boss ?
By definition of public most if not all topics go off topic its called public interaction
I take it when your talking to someone face to face you never wander from your original conversation starter .
Maybe relax a little and take the public forum for what it is , Public !

 

[Suns_PSD]

Can you stop going on about the M1 being inefficient ffs when you have zero self experience with anything Avinox it really isn't in the real world.

Except Avinox themselves acknowledged it by correcting it on the M2... but okay. They also told Francis that they were shocked he had that inside info about the tight seals. Lol

 

[emonty]

Waiting for long term reviews....until then it's all "noise".

 

[ZR1]

Except Avinox themselves acknowledged it by correcting it on the M2... but okay. They also told Francis that they were shocked he had that inside info about the tight seals. Lol

You seem to overexaggerate the difference though, from the efficiency tests we've seen its not an outlier as inefficient. Your taking one bit of minor information - it has tight seals and blowing it out of proportion.

I think you did it before and somehow came to the conclusion that a bosch 600w would give the same output as a 800avinox?