Couldn't resist and tried it on 12S lipo's fully charged at 50v, still with the original 11amp controller.

The controller seemed to work ok and the motor really comes to life. When unrestricted and full throttle it could pull me along the flat at about 20/21m p h without pedalling but it is noticable noisier you can definately hear it. It lacked the power of the bigger motors when going up hills or into headwinds but for it's size/weight it's really good. I also stopped every now and then to feel how hot it got and it was only warm. There does sound like there is some resistance in the motor when freewheeling but you can't really feel it.

Might see if I can up the controller amps a bit next.

Hello everyone i'm new here. I plan to build a stealth ebike using different parts and the ytw06 is my favorite one for this objective. But it seem to be noisy and have some resistance that is a big point to me. I wonder if just hadding some atf oil inside would make a difference. Make it run quieter and smoother.

The noise doesn't come from the gears. it's the commutation noise from the sensorless motor. Oil might reduce the resistance a bit.

Ok thanks so i think i understand better why a sin wave signal can reduce noise

The sound isn't that loud and I don't find the resistance a problem but i've not used it much yet. I am hoping to do some mileage with it when the weather starts to improve next year so it might reduce when it's been used a while.

Hi, I'm new here, and here's my newbie question about a very new motor:

Do you think this motor will work well on a 24" kids e-bike?

• very lightweight, which is even more important for kids (500g lighter than the lightest I found so far, CZJB JB-75A with 1.9kg)
  
• lower torque isn't critical for 25-35kg riders on a 14kg bike, so I guess uphill overheating should not be much of a problem either
  
• noise isn't critical
  
• 23 km/h top speed is enough for kids (it's mostly about climbs)
  
• resistance and slower reaction can be a problem for kids
  

I have considered Cute Q100 CST, CZJB JB-75A and Shengyi Dgw12B so far. What do you think?

Thanks! Jens

I think it would br pretty good for that. Torque isn't an issue with that motor. It's similar to a Q100 at the same current - maybe more.

Brilliant, thanks for your quick feedback.

May I ask which controller and display you’d recommend with this motor?

In my German forum, a fellow kids bike builder found this very lightweight battery with 6ah for 200€+tax: http://s.aliexpress.com/3UzmuYfA

I want to give it a try... Saving 400-700g vs. the other motors is a huge plus. I could stay below 3kg for the entire electric drive system.

It comes with its own 11A LSW controller and Bigstone display. Order everything from Xiongda because they're very cheap and you'll get full support.

 

It's a sensorless motor. You could use any other high speed sensorlees controller if you want. The supplied one just has one drawback, which is the one second delay after opening the throttle or pedalling. That's to give the controler time to figure out the correct motor timing.

I pre-ordered a (hall-)sensored version of the Xiongda YTW06, which is being built right now and will hopefully be shipped before Christmas.

Now I need to decide about the controller and a lightweight, easy to use interface. Any recommendations for the now sensored motor?

I pre-ordered a (hall-)sensored version of the Xiongda YTW06, which is being built right now and will hopefully be shipped before Christmas.

Now I need to decide about the controller and a lightweight, easy to use interface. Any recommendations for the now sensored motor?

I'm jealous. A really good controller is the S06S from BMSbattery or the Sine wave one from Greenbikekit or the 15 amp (14A?) sine wave one from PSWPower. If you need 48v, you can find them on Aliexpress.

https://bmsbattery.com/home/842-36v48v-250w-controller-for-brushless-motor-with-bluetooth-ios-app.html

Thanks, David! And Bonnie says hello Downside of the new censored version is I'll have to wait until after Christmas...

Thanks for the link, [mention=10356]anotherkiwi[/mention] - I'll buy that one

What freewheel are you going to use on that motor?

 

I have a DNP 11-32 7 speed here for my Mxus and after studying it I think about 1.5 mm can be machined off the stack height. I am looking at the DNP 13-34 8 speed which has a stack height of 38.6 + or - 0.3 mm which I would like to get down to 37.4 mm tops.

I was looking at the sunrace 8s 13-32, but it’s very heavy. 650g

Still searching, the dnp is hard to find...

You can get DNP ones from Aliexpress. I have 11T/32T 8 speed ones for £20.

I got mine direct from DNP. With shipping it worked out about the same price as it would have if d8veh shipped from the UK...

Have relaced the small Xiongda to a 26" rim ready to trasfer it to another bike.

Have relaced the small Xiongda to a 26" rim ready to trasfer it to another bike.

[ATTACH=full]27903[/ATTACH]

 

Damn that is tiny! Wish they made a cassette version...

Damn that is tiny! Wish they made a cassette version...

I wish they made a cassette version too.

This gives you an idea of how small it is.

And now the Xiongda is on my sons beat up heavy paper-round bike. PAS only with speed restricted to 12mph, may sneak it a bit lower.

Can the throttle be programmed to walk assist only on these Lishui controllers?

Didn't know kids still did paper rounds, or were even allowed too. Good on him, that and saturday shelf stacking was how I got my start.

The motor has failed after 147 miles. At first I thought it was the bearings until I opened up the motor and found this.

Have emailed Xiongda about some replacment gears.

Bugger, what a mess, did the hub get very hot at some point? Hopefully Xiongda will be able to sort you some replacements, an advantage being able to deal with the manufacturer direct.

Hmmmm... Are they made from cheese? Looks like your son wasn't in the right gear on a very steep hill.