The noise generated in that video is 100% going to appear on all motors to some degree, that is simply backlash in the gear sets which cannot be removed without removing all tolerances from the gears and having a gearset which wont turn. The reason some people hear it after a few rides is the grease gets distributed and no doubt when the motor warms up the tolerances increase to some extent. You are totally wasting your time chasing that backlash sound, even if you get a new motor that will do it also after a time. It is 10x quieter than the M1 and the m2 doesn't do it on every bump, but its not a fault - would be nice if it was totally 100% silent but not possible to remove all backlash with that design.
Avinox M2s rattle
- Thread starter Rob209
- Start date
Yeah but mine is doing it on every bump. You even dont have to go fast or rowdy. The sound is kind of like a Shimano EP801 does.
If it is true, what you say, avinox should say the motor is quiter and not totally silent.
They do not say that (totally silent) they say noise is kept below 45 I think i recall - The Avionix M2S drive unit was specifically optimized to reduce sound, with a sound pressure level not exceeding 45dBA.
Don’t get me wrong, I would love my m2s to be totally silent, but it’s not going to be sadly
Don’t get me wrong, I would love my m2s to be totally silent, but it’s not going to be sadly
zakflip
New Member
<45dbA is what Amflow advertise, so most definitely a selling point. However they do word it as 'Reduced' for the M2S. In their 'Ultimate Silence' tagline.
Exactly, reduced not silent. I hold my hand up to not fully reading that before selling my PL Pro to buy the PX pro, and whilst the m2s is def quieter it’s not totally silent. Do I regret the change because of that, no, it’s still much quieter, smoother and more efficient, but any prospective buyer should know it is not silent and has some degree of rattle, might take a ride or two to move the grease about but there will be some noise at some point.
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zakflip
New Member
listening to other motors on rides, the Avinox motor is still very quiet in comparison. (even with the fault mine has)
yep, I agree, it's very quiet and doesn't consistently rattle on every bump like the m1, and even when it does rattle it's much quieter than the m1
a couple more M2S data points for ya
two Pivot Shuttle Amp’d bikes with apx. 690 km and 750 km
No motor rattle noticed.
No gear lash detectable.
Just a slight “purr” under load at times.
#1 (430 miles): 27.5 rear wheel w/ 18t freehub engagement
#2 (480 miles total): 320 miles, 27.5 rear w/ 18t freehub;
160 miles, 29 rear w/ 120 POE freehub
zakflip
New Member
New M2S motor fitted today and back to a much quieter sounding motor, no rasp.
Took it for a 10 mile test ride and all is good again.
Took it for a 10 mile test ride and all is good again.
Let us know how it sounds after about 500 miles
Plenty people with 500miles doing just fine bud. Relax with the snarky Avinox hate. What are you getting from this? Some troll satisfaction?Let us know how it sounds after about 500 miles
Oh dear, if you took the time to read earlier posts by @zakflip you wouldn't make yourself look silly. Bud.
800 miles m2s px pro.
I have some more noticeable raspy noise that i dont think was there before in gears lower than 6 on steep climbs, but no real rattle still. Nothing like the rasp in the video, but nonetheless something I am keeping an eye on. Almost whisper quiet when gear 7 or higher in auto and on relatively flat ground/mild fire road climbs.
I did, however, manage to coax a similar-to-reported rattle noise out by peddling hard under full load at roots before immediately coasting. Very specific, but here is about a half a second window between the overrun finishing and the motor going chill while coasting. In this window of time I can reliably replicate about 1 big slap of that M1 rattle by hitting something chunky, but continuing to coast downhill afterwards there is absolutly nothing more for kms once i'm coasting - silent.
I have some more noticeable raspy noise that i dont think was there before in gears lower than 6 on steep climbs, but no real rattle still. Nothing like the rasp in the video, but nonetheless something I am keeping an eye on. Almost whisper quiet when gear 7 or higher in auto and on relatively flat ground/mild fire road climbs.
I did, however, manage to coax a similar-to-reported rattle noise out by peddling hard under full load at roots before immediately coasting. Very specific, but here is about a half a second window between the overrun finishing and the motor going chill while coasting. In this window of time I can reliably replicate about 1 big slap of that M1 rattle by hitting something chunky, but continuing to coast downhill afterwards there is absolutly nothing more for kms once i'm coasting - silent.
Yotaismygame
New Member
Check your chain stretch and cassette.
slickrock
Well-known member
Not pointing to you specifically, but it might be worth separating out other potential motors issues for the specific topic of this thread, which is M2S motor rattle. Already on this thread there have been conflations between rattle and rasping issues. The true controversy here - of which we are still trying to assess the scope of it and which in the end may be quite limited - is the possibility of a motor specifically designed to address motor rattle that is not working as designed. Any intel on actual first hand broken-in (150 miles +) owner experiences with the presence (or absence) M2S rattle/float and consequent warranty handling where specific rattle exists are of greatest epistemic value, as in separating the signal from the noise.
Fair enough. Essence of my post was "still no rattle".
Thats the data point as one of us with a higher mileage count on the m2s. Well and truly broken in at this point.
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