Search found 3583 matches

by motomech
Apr 28 2021 1:24am
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2311

Re: Bafang front wheel Uber motors - which controller

... the torque arms on both sides with arm facing the front of the bike. Yes, that is the best way. If one traces the direction of the wheel as the bike moves forward, the opposite direction is the torque direction of the axle. In this case, the TA's are moving against the fork tubes, rather than p...
by motomech
Apr 26 2021 2:13am
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

OK, here's one from PSW Power's ebay store; https://www.ebay.com/itm/222373438917?hash=item33c67d65c5:g:SuQAAOxyaTxTUWbp Don't get hung-up on the 250 Watt or 350 Watt thing, this one is 12 Amp like your original. Sensorless 810 display on / off & 3 - speed limiter Gd. price Only bad thing is tim...
by motomech
Apr 25 2021 7:33pm
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

The amazon controller is not exactly right. Note it is rated 18 Amps and I think it might be too much for your application unless you want a scooter that wheelies. Almost all controllers are matched to their displays and don't interchange, but w/ this one, I don't see a connector for a display and I...
by motomech
Apr 25 2021 12:04pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2311

Re: Bafang front wheel Uber motors - which controller

Throw those cast things away and use a torque arm on each side. This is a BIG, powerful motor!
by motomech
Apr 25 2021 11:57am
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

OK, first off, I think we had a rare occurance where I posted and deleted at the same time you responded. Sorry, my bad as I thought my post sounded harsher than I intended. John in CR has a point, sometimes when an electric motor is "lugged" down to a slow speed, the controller "sees...
by motomech
Apr 24 2021 5:48pm
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

Sensorless controllers are the way to go! Then all you do is hook up the phase wires, and connect the Learn wires, usually white and the motor spins. You flick the throttle to change the direction of the wheel and you unplug the white wires. While you are at it you might as well buy 2 spare throttl...
by motomech
Apr 24 2021 5:36pm
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

Some motors are bolted together at that other side, or have a circlip or some other fastener securing the axle on that side to the outside of the bearing, but the geared motors I've had are not made that way. (I have not yet opened up my motors from the above link, so I don't know if they are made ...
by motomech
Apr 24 2021 1:39pm
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

thanks, mototech. should those components turn bad, i'll know where to go. meanwhile, got a good source for these SWX02 motors? (see end of this note for details.) You don't understand, a sensorless controller doesn't use the Hall sensors, it doesn't matter if one or more of the motor Hall sensors ...
by motomech
Apr 24 2021 9:07am
Forum: EBike Technical
Topic: Killed 2 bafang SWX02 motors. Yes, two!!!
Replies: 38
Views: 838

Re: Killed 2 bafang SWX02 motors. Yes, two!!!

I recently ran my SWX02 on a sensorless controller, it ran fine; https://www.pswpower.com/products/36v-48v-350w-brushless-dc-square-wave-controller-ebike-electric-bicycle-hub-motor-controller-with-right-output-31 The KT890 would be the least expensive display that would work; https://www.pswpower.co...
by motomech
Apr 20 2021 6:58pm
Forum: EBike Technical
Topic: Looking for a kit match for a particular battery
Replies: 12
Views: 237

Re: Looking for a kit match for a particular battery

So I need to scrap the Fuji? Nobody said that, it still a bicycle. For a mini-motor on 36 Volts, it would be ok for an "assist bike w/ a top speed around 20mph. The reason it won't work is the Jump whl. is not v-brk. compatible, it doesn't present a flat side for the pads to work on. At 3.6 Kg...
by motomech
Apr 20 2021 5:18am
Forum: EBike Technical
Topic: Looking for a kit match for a particular battery
Replies: 12
Views: 237

Re: Looking for a kit match for a particular battery

Do I set this up as a front wheel motor? Or is it a deal where put it on the real axle and move the existing cassette from the donor bike (a Fuji mx-550)? The "Jump" recycled wheel/motor ASM is disc brake only which eliminates the Fuji. It's not much of a donor bike anyway. The Bafang SWX...
by motomech
Apr 16 2021 4:22pm
Forum: EBike Technical
Topic: best shock type for rear hubs?
Replies: 12
Views: 305

Re: best shock type for rear hubs?

I don't think you are asking the right question. Any "control" of a hub motor will be a function of the rebound damping for unsprung weight, not so much the compression damping and bicycle shocks are not designed the deal w/ the extra weight of the motor in rebound. Having said that, I wou...
by motomech
Apr 14 2021 3:03pm
Forum: EBike Troubleshooting
Topic: Accidental ebike newbie with controller and battery questions
Replies: 19
Views: 668

Re: Accidental ebike newbie with controller and battery questions

Seeing as I'm just dipping my toes into the ebike world and want to keep cost down for now.... But you want to buy a $70US controller that forces you to buy an expensive display and there's freight on top of that??? The PSW Power link I provided sells the same controller for $19. And they offer the...
by motomech
Apr 12 2021 1:19pm
Forum: EBike Troubleshooting
Topic: Accidental ebike newbie with controller and battery questions
Replies: 19
Views: 668

Re: Accidental ebike newbie with controller and battery questions

My first hub motor was a MXUS like that one (over 10 years ago) and it was great. Aside from a added sensor, I doubt it has changed. I used to run it at 20 Amps and 48 Volts, but had it as high as 25 Amps and 56 Volts. That was a bit much, as that much power would hammer (make it knock) the poor mot...
by motomech
Apr 12 2021 12:33pm
Forum: EBike General Discussion
Topic: What about electrifying a StreetStrider? Pros and cons?
Replies: 7
Views: 454

Re: What about electrifying a StreetStrider? Pros and cons?

The kayak was super simple, I copied this idea; https://www.youtube.com/watch?v=-xa-XJ5G9vU Running a LiPoly pack of 12S (around 46 Volts)/10,000 mAh thru a golf cart converter to feed 12 Volts to the motor. No throttle, on/off, low/high. Doesn't need much power, the hull maxs out around 4 or 5 MPH,...
by motomech
Apr 11 2021 8:13am
Forum: EBike General Discussion
Topic: Upgrading controller and battery advice
Replies: 8
Views: 376

Re: Upgrading controller and battery advice

Can I upgrade my battery/controller to either a higher voltage (48v) and/or higher amperage without damaging the motor? If only one of these can be fulfilled to protect my motor, which one would be my best bet? Yes you can. I can't ID exactly which Bafang your motor is by that engine code, but I su...
by motomech
Apr 10 2021 12:05pm
Forum: EBike General Discussion
Topic: Last Piece of the Puzzle
Replies: 5
Views: 265

Re: Last Piece of the Puzzle

You might ck out Bike Island. Great folks and great prices;
https://bikeisland.com/index.cgi
by motomech
Apr 06 2021 8:03pm
Forum: EBike Troubleshooting
Topic: Can you replace axle shaft?
Replies: 4
Views: 253

Re: Can you replace axle shaft?

On that motor, it's a one piece axle and to get it out a gear puller is used, but it's very difficult and might require heat. There are dis-assemble vids, but few go that far. There's one on the net where a member here, spinningmagnets took an Ezee geared motor apart(he may chime in). But it's proba...
by motomech
Apr 06 2021 5:23pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2311

Re: Bafang front wheel Uber motors - which controller

Gobi's very first line in his first post;
I am a complete noob on this topic so please excuse by lack of knowledge.
You know, when you sandbag like that, you waste people's time.
by motomech
Apr 06 2021 5:18pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2311

Re: Bafang front wheel Uber motors - which controller

I have plenty of 36V 12A controllers, That's probably about right for these motors when frt. mounted. I've run several different PSW P. 20 Amp controllers and at 48 Volts, that set-up just feels like a little too much. My long travel forks go thru their range of travel at a touch of the gas and w/ ...
by motomech
Apr 05 2021 12:50pm
Forum: EBike Technical
Topic: Truckrun 250w hub + ZNZK Controller
Replies: 8
Views: 343

Re: Truckrun 250w hub + ZNZK Controller

Ok, now all you have to do with the PAS is turn the sensor around (180 degrees) on the bracket. only one of the screws will line up, but it's enough to hold it place.
You MUST install a torque arm. If the axle spins in the drop-outs, it will ruin the bike,...and your day.
by motomech
Apr 03 2021 11:02pm
Forum: EBike General Discussion
Topic: What about electrifying a StreetStrider? Pros and cons?
Replies: 7
Views: 454

What about electrifying a StreetStrider? Pros and cons?

https://www.streetstrider.com/products/streetstrider3i My electric kayak is done. My latest ebike is almost done(for a while anyway:) I've run out of things to electrify. Not much in the way of detailed spec.s on the StreetStrider. It has a 20 inch rear whl., so maybe something like a Q75 or Q85 hub...
by motomech
Apr 03 2021 10:52pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2311

Re: Bafang front wheel Uber motors - which controller

lewtwo et momotech, Thanks, Ordered: Shipping was shockingly only $35, I ordered 2 of everything, just in case on breaks I have a backup, else I see a 2nd bike for her #1 dad :-) in the future. ebike 24V 36V 48V intelligent black KT- LCD5 Control Panel LCD Display Electric Bicycle bike Parts for KT...
by motomech
Apr 03 2021 4:39pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2311

Re: Bafang front wheel Uber motors - which controller

When all is done and if the bike feels too tall for her (w/ shock set to lowest), you can buy a cheap, used 24" whl and tire for the rear.