Bewo, New Crank-drive Motor

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
tahustvedt   10 kW

10 kW
Posts: 595
Joined: May 26 2014 9:31am
Location: Northern Norway

Re: Bewo, New Crank-drive Motor

Post by tahustvedt » Jun 08 2016 4:21pm

That pinion gear looks really fragile. There's no center section to it so it probably bends under load. Also looks like it has cracks or forming marks on the teeth, but that could be grease.

Tushar D   100 mW

100 mW
Posts: 46
Joined: May 02 2016 7:25am

Re: Bewo, New Crank-drive Motor

Post by Tushar D » Jun 29 2016 8:30am

Hey emax,

Its been a while since you updated the thread.
Your views on the drive so far would be much appreciated.
Any problems you faced with the drive so far?

Thanks in advance

bgt   10 W

10 W
Posts: 99
Joined: Sep 22 2014 12:00pm
Location: The Netherlands

Re: Bewo, New Crank-drive Motor

Post by bgt » Jul 01 2016 5:11am

tomjasz wrote:The thousands of riders without problems, that don't come and post. Reviews and problem reports are biased towards the negative.
My Bafang BBS01/02 motors did far over 10.000km already. Took them apart and greased them. No problems of worn bearings or teethwheels :D Very happy with them.

[moderator edit to fix quote]
Bike: Batavus Mamboo
Motor: BBS02B-500W
Battery: 2x 20Ah/36V Dolphin
Folding Bike: Batavus Intro Versa + another 1
Motor: BBS01-250W...........2 off.
Battery:

User avatar
tomjasz   10 GW

10 GW
Posts: 4104
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: Bewo, New Crank-drive Motor

Post by tomjasz » Jul 01 2016 5:15pm

bgt wrote:
tomjasz wrote:The thousands of riders without problems, that don't come and post. Reviews and problem reports are biased towards the negative.
My Bafang BBS01/02 motors did far over 10.000km already. Took them apart and greased them. No problems of worn bearings or teethwheels :D Very happy with them.

[moderator edit to fix quote]
My only disappointment is sorting the repairs when it does come time. Bafang is very confusing and hard to keep track of. Another controller change and vendors learn by error and omission. STILL no serial numbers to track versions. But they do run as you said. I love my BBS01's I hope I can sort the pinion, pinion plate, and gear fiasco.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

steamboy   1 mW

1 mW
Posts: 12
Joined: Aug 23 2015 10:25am

Re: Bewo, New Crank-drive Motor

Post by steamboy » Aug 24 2016 12:10pm

hi
after 800km without any problem i borrow the bike to my friend who accidently rip off the chain which get stuck in the derailleur and cause motor axle broken https://goo.gl/photos/hDs1dCw3GjN2x4bb7

bionicon did you repair it and if yes how?

Tushar D   100 mW

100 mW
Posts: 46
Joined: May 02 2016 7:25am

Re: Bewo, New Crank-drive Motor

Post by Tushar D » Aug 24 2016 12:23pm

Kiriakos also broke his axle. So, the Axle seems to be the weak point. It cant take extreme pressure. I guess you can get it directly from Bewo. Seems it would be wise to keep one in spare.

Sent from my SM-G900H using Tapatalk

bionicon   1 kW

1 kW
Posts: 307
Joined: Jun 28 2015 2:29pm
Location: Belgium

Re: Bewo, New Crank-drive Motor

Post by bionicon » Aug 24 2016 2:48pm

hey steamboy, if i remember correctly its not easy to change the axle,because its presfit in the rotor. I never changed the axle with the origin motor, i used an rc motor.
I know You can order the axle as a part but maybe also with the rotor mounted on as one part?
Ask bewo directly they answer mails correctly.

User avatar
tomjasz   10 GW

10 GW
Posts: 4104
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: Bewo, New Crank-drive Motor

Post by tomjasz » Aug 24 2016 5:59pm

Tushar D wrote:Kiriakos also broke his axle. So, the Axle seems to be the weak point.

Too funny. All that chatter about a weak plastic gear and 2 1/2 years later no failure. But the superior motor broke an axel.
No joy in that. Bafang needs competition! But it is funny considering how Kiriakos ranted...
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

steamboy   1 mW

1 mW
Posts: 12
Joined: Aug 23 2015 10:25am

Re: Bewo, New Crank-drive Motor

Post by steamboy » Aug 25 2016 7:05am

not sure how Kiriakos broke his axle but mine gets really hard punch from chain stuck in the derailleur, while the motor runs at maximum speed. the derailleur was completely destroyed. before that the motor work excellent - 1400w at peak on 48v lipo battery pack, steep hills on high gear eating like cake (25 kg fat tire bike w battery + 75kg live payload).
thanks for help just write to Bewo, will report if the repair were a success.

Tushar D   100 mW

100 mW
Posts: 46
Joined: May 02 2016 7:25am

Re: Bewo, New Crank-drive Motor

Post by Tushar D » Aug 25 2016 12:30pm

Here is the link about Kiriakos

http://www.ittsb.eu/forum/index.php?PHP ... pic=963.30

Bewo sent him special tools to install the crank

I have also bought the 36v 350w kit. Yet to install and test.
The quality and build seems good, but the weakest point so far seems to be the Crank.
Will post update once i install the kit.
Last edited by Tushar D on Aug 26 2016 12:41am, edited 1 time in total.

steamboy   1 mW

1 mW
Posts: 12
Joined: Aug 23 2015 10:25am

Re: Bewo, New Crank-drive Motor

Post by steamboy » Aug 25 2016 1:17pm

i take out the rotor and wondering why is 1/3 covered by thin metal tube. Image
Image
Last edited by steamboy on Aug 26 2016 3:30am, edited 2 times in total.

Tushar D   100 mW

100 mW
Posts: 46
Joined: May 02 2016 7:25am

Re: Bewo, New Crank-drive Motor

Post by Tushar D » Aug 25 2016 3:25pm

Image not visible steamboy

Edit:- visible now
Last edited by Tushar D on Aug 28 2016 11:57am, edited 1 time in total.

User avatar
tomjasz   10 GW

10 GW
Posts: 4104
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: Bewo, New Crank-drive Motor

Post by tomjasz » Aug 26 2016 12:47am

Tushar D wrote:Here is the link about Kiriakos

http://www.ittsb.eu/forum/index.php?PHP ... pic=963.30

Bewo sent him special tools to install the crank

I have also bought the 36v 350w kit. Yet to install and test.
The quality and build seems good, but the weakest point so far seems to be the Crank.
Will post update once i install the kit.
Not at all helpful. Would have been nice to have pictures of part and tools rather then another beauty pose.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

User avatar
tomjasz   10 GW

10 GW
Posts: 4104
Joined: Mar 29 2014 1:45pm
Location: Out riding, MN USA
Contact:

Re: Bewo, New Crank-drive Motor

Post by tomjasz » Aug 26 2016 12:49am

steamboy wrote:not sure how Kiriakos broke his axle but mine gets really hard punch from chain stuck in the derailleur, while the motor runs at maximum speed. the derailleur was completely destroyed. before that the motor work excellent - 1400w at peak on 48v lipo battery pack, steep hills on high gear eating like cake (25 kg fat tire bike w battery + 75kg live payload).
thanks for help just write to Bewo, will report if the repair were a success.
The link he says failed bearing, on Facebook something about concrete.
Thanks Justin_le we're here thanks to you. All the best to the mods for their tireless work keeping it on an even keel.

tahustvedt   10 kW

10 kW
Posts: 595
Joined: May 26 2014 9:31am
Location: Northern Norway

Re: Bewo, New Crank-drive Motor

Post by tahustvedt » Aug 26 2016 6:56am

What? it broke? I though it was perfect in every way.

Dumsterdave   100 W

100 W
Posts: 219
Joined: May 09 2016 5:26am
Location: copenhagen, Denmark

Re: Bewo, New Crank-drive Motor

Post by Dumsterdave » Aug 08 2017 11:03pm

Any updates on how everyone's bewo is doing?

Tushar D   100 mW

100 mW
Posts: 46
Joined: May 02 2016 7:25am

Re: Bewo, New Crank-drive Motor

Post by Tushar D » Aug 09 2017 12:25am

Dumsterdave wrote:Any updates on how everyone's bewo is doing?
I havent used mine much, just around 200km. Working good, pulls well. No noise. I am running it on 36v though.

Springforward   100 µW

100 µW
Posts: 8
Joined: Feb 25 2017 1:12pm

Re: Bewo, New Crank-drive Motor

Post by Springforward » Sep 03 2017 4:14am

Been running mine 14 months now, 48v @15amps, (max amps can be set from the panel), no problems. Dismantled and greased once, I made the tool to remove the chainwheel. Otherwise regular tools. The motor shaft is supported at it's outer end in a needle roller bearing located in the outer case. This is quite small and could be overlooked when greasing if unfamiliar with such things. It's a single stage reduction, single helical gear with appropriate thrust bearings. Overall an excellent unit, suits my use perfectly, that it may not suit others does not make them wrong or misguided.

Some observations, A sign that greasing is required is a chattering noise when pushing the bike backwards. The original grease was a bit sparse, packing with good quality Lithium grease has transformed the running and all but eliminated the 'back chatter'. The now well packed gearcase may need a breather pipe at some point.
The response on the pedal sensor is adjustable on the the panel from instant to a delay to suit you. I like instant but take care if pushing the bike with power on, any turning of the cranks by chain drag or catching on something will cause the bike to leap forward ,so switch off, or one finger round the brake lever every time. A good point is instant cut off on both brakes and pedal sensor. There is no over run at all. The motor,controller and all wiring plugs are waterproof ,don't ask how I know this, just read the instant response bit again.

steamboy   1 mW

1 mW
Posts: 12
Joined: Aug 23 2015 10:25am

Re: Bewo, New Crank-drive Motor

Post by steamboy » Sep 03 2017 5:31am

Dumsterdave wrote:Any updates on how everyone's bewo is doing?
mine is dead. not possible to repair/buy any spare parts, the only option is to buy a whole new set. so I go cyclone 3000w

mmmpretzels   1 µW

1 µW
Posts: 1
Joined: Jan 15 2018 11:22pm

Re: Bewo, New Crank-drive Motor

Post by mmmpretzels » Jan 15 2018 11:56pm

Hi All,

I have a Powerider Force that uses the Bewo 250w motor; bought it online from Justride in Melbourne back in early 2016 (I'm in Brisbane).
I sent it back to them after a couple of months as the motor was making a grinding/binding noise; they reckoned the motor was loose and said it likely due to extra vibration from me putting on puncture-proof tyres (Tannus Tyres - happy with these :) I'm doubtful they were the source of the problem though). Since the bike came back no motor issues though, until...
A couple of weeks ago, go to pedal off and makes a cracking noise. It's gotten progressively worse.
I think it could be a broken pedal axle, or whatever part links the crank/axle inside to then drive the chainwheel. If I pedal, even with no assistance, makes cracking noise and doesn't seem to provide drive to chainwheel properly. With bike stationary and some pushing on pedals it feels "springy", whereas it used to have a solid feedback.
It doesn't seem to be the motor itself, as if I just use the throttle the bike takes off smooth & noise free.

Does anyone have info on how to best get the chainwheel off without specialised tools? Hoping to get the motor open so I can see what the actual problem is, and if it can be fixed, rather than spending $$$ on a replacement.
I have not yet tried contacting Bewo directly to see if they can provide spare parts (although a friend mentioned they might know someone near Brisbane who could fabricate small motor parts).
Thank in advance y'all :D

Springforward   100 µW

100 µW
Posts: 8
Joined: Feb 25 2017 1:12pm

Re: Bewo, New Crank-drive Motor

Post by Springforward » Jan 17 2018 6:51am

PM sent.

Springforward   100 µW

100 µW
Posts: 8
Joined: Feb 25 2017 1:12pm

Re: Bewo, New Crank-drive Motor

Post by Springforward » Jan 17 2018 7:57am

The Bewo gear case is very sparse on grease from the Factory. Your problem is possibly this. There is a sprag clutch which engages as soon as you pedal and this may be dry. The gear case really needs to be opened and well packed with a good lithium grease. I have sent you some info on the chain wheel tool ,feel free to post it publicly. The fact that it is quiet on motor only points to the clutch. The main reduction gear is a very neat unit incorporating the main bearing, clutch and thrust bearings in a single slim unit. It's weakness is lubrication. I am considering converting mine to an oil bath using hypoid gear oil rather than grease. Grease tends to get thrown off parts leaving them dry. Oil will spread constantly over the parts but oil drag and the exact level will have to be determined by test. The most vulnerable part in my opinion is the small needle roller bearing supporting the motor shaft. If this ever runs dry the shaft will seize and break.
I would suggest that you stop using the unit until you can grease it properly.

Info on Sprags https://en.wikipedia.org/wiki/Sprag_clutch

EFB   1 µW

1 µW
Posts: 1
Joined: Jul 22 2018 10:34am

Re: Bewo, New Crank-drive Motor

Post by EFB » Jul 23 2018 5:43am

My Fat Bike, 13 month old, 2800km, Bewo makes Crackling noise and needs chainwheel change.

The noise gets worse and is happening with bigger load from motor. If I pedal, there is less noise and if I use moderate power from motor and pedal, there is no noise.

Any advice?

I also need to change sprocket, but it needs some kind of special tool. Any picture or advise what kind of tool to use?

Thank you

Vesa/Finland

ViriViri   1 µW

1 µW
Posts: 2
Joined: Jul 24 2014 1:26pm

Re: Bewo, New Crank-drive Motor

Post by ViriViri » Aug 14 2018 11:00am

Vesa, the I think the chainring needs a 4-pin 43mm od socket, lukkomutteriavain in Finnish, You can find it for example in motorcycle shops.
Then to another matter. My friends motor has stopped working. The motor spins fine but gives absolutely no power to the chainring. There is virtually no vibration on grinding noise. What do you guys think about this?

Hillhater   100 GW

100 GW
Posts: 10161
Joined: Aug 03 2010 10:33pm
Location: Sydney ..(Hilly part !) .. Australia/ Down under !

Re: Bewo, New Crank-drive Motor

Post by Hillhater » Aug 14 2018 7:19pm

Either a gear is stripped, or one of the freewheel clutches os broken.
Strip it down and inspect it.
This forum owes its existence to Justin of ebikes.ca

Post Reply