Search found 3365 matches

by motomech
Jan 21 2020 12:58pm
Forum: E-Bike Technical
Topic: Help me disassemble this aikema motor
Replies: 13
Views: 751

Re: Help me disassemble this aikema motor

Of course I've seen the white wire, but I never tried to locate the sensor. I suppose it's on/in the stator somewhere, but I've never seen it. I guess since we haven't seen it, we wouldn't know what it is and where go get a new one. Maybe someone has that info. Often, if the motor hasn't been used, ...
by motomech
Jan 21 2020 12:50pm
Forum: E-Bike General Discussion
Topic: gorilla glue epoxy/hall sensor
Replies: 11
Views: 194

Re: gorilla glue epoxy/hall sensor

I use JB Weld.
by motomech
Jan 21 2020 12:49pm
Forum: E-Bike General Discussion
Topic: Ebike control buttons with front derailleur
Replies: 7
Views: 145

Re: Ebike control buttons with front derailleur

I would venture that most folks don't use the frt. derailleur on an ebike. I never have, even on my lowest power "assist" bike and took it off to locate my throttle on the left side.
by motomech
Jan 15 2020 11:05pm
Forum: E-Vehicles General Discussion
Topic: List of battery bags
Replies: 2
Views: 297

Re: List of battery bags

I've been using the EV Flacon Bag; http://www.falconev.com/ for 6 years and it's been very durable. Some seams are starting to fray, but none have come apart yet. The key to making these things last is to support the pack weight from below, not to let it hang from the straps. I think it's about the ...
by motomech
Jan 10 2020 6:06pm
Forum: Battery Technology
Topic: Li-Po size limitations
Replies: 4
Views: 225

Re: Li-Po size limitations

If bi "lipo", you mean LiPoly, this is the place to start looking;
https://hobbyking.com/
by motomech
Dec 30 2019 5:46pm
Forum: E-Bike General Discussion
Topic: Hydraulic Disc Brakes for e-bike - suggestions....
Replies: 5
Views: 395

Re: Hydraulic Disc Brakes for e-bike - suggestions....

There are some issues to over-come to go pure hydraulic and most go the Hall sensor route. Even Justine Le of Grin (and this forum) tried coming up with a work-around to hydraulic.
I just did this;
viewtopic.php?f=31&t=81359&p=1230540&hi ... o#p1230540
by motomech
Dec 30 2019 5:30pm
Forum: E-Bike Technical
Topic: 8fun motor and unknown controller worth saving? (A shittii ebike story)
Replies: 8
Views: 361

Re: 8fun motor and unknown controller worth saving? (A shittii ebike story)

Yeah, it looks like a BMP; https://endless-sphere.com/forums/viewtopic.php?t=51237 It's a 5 Kg geared motor like the Ezee, Mac, BMC, etc. Maybe not quite as many design features as those, but a nice motor never the less. Been around a long time. The speed/volts ratio listed leads me to believe it's ...
by motomech
Dec 17 2019 5:59pm
Forum: E-Bike Technical
Topic: Q128 CST / Top Speed / P1 - Reduction Ratio
Replies: 14
Views: 1032

Re: Q128 CST / Top Speed / P1 - Reduction Ratio

PO has asked me about the lack of free spinning by hand of the motor wheel. It only turns a half turn or so and he thinks it may be too tight. Well, when it's installed correctly, it really can't be secured too snugly, short of ripping off the axle threads. Where the wheel comes in contact of the in...
by motomech
Dec 14 2019 7:31pm
Forum: E-Bike General Discussion
Topic: Who makes the best JST parallel cables?
Replies: 17
Views: 1074

Re: Who makes the best JST parallel cables?

I buy the ones on Ebay that have silicone wires, I think they are usually Turnigy. I use them (the connectors) for several things and the silicone wires are so much nicer to work with.
by motomech
Dec 14 2019 7:27pm
Forum: E-Bike Technical
Topic: Q128 CST / Top Speed / P1 - Reduction Ratio
Replies: 14
Views: 1032

Re: Q128 CST / Top Speed / P1 - Reduction Ratio

Yeah, That link was at a time where we were taking Q100's apart left and right, but not many Q128's. I always just assumed they were like Q100's, only bigger :D
by motomech
Dec 14 2019 7:18pm
Forum: E-Bike Technical
Topic: how to protect hub for winter and salt and water
Replies: 18
Views: 1488

Re: how to protect hub for winter and salt and water

Water ingress is going to happen on common hub motors. In reasonable conditions(Water not up to the axel), motor heat can evaporate out a lot of it that didn't drain out. Salt, dirt and other particulates can build up, more than rust, not that much will rust, and probably the best thing to do is to...
by motomech
Dec 14 2019 7:14pm
Forum: E-Bike General Discussion
Topic: 5 years using a brushless Aotema
Replies: 7
Views: 681

Re: 5 years using a brushless Aotema

Top speed is as fast or faster than most dogs, ....
Never heard an ebike described quite that way.
I always liked the way the Aotema looks and was going to go with it as my first build, but the Cute (Q100) came out and I got involved w/ them.
by motomech
Dec 12 2019 8:57pm
Forum: E-Bike Technical
Topic: Q128 CST / Top Speed / P1 - Reduction Ratio
Replies: 14
Views: 1032

Re: Q128 CST / Top Speed / P1 - Reduction Ratio

Doesn't seem like folks are that interested in mini geared hub motors these days, but here is an "oldie but goodie";
viewtopic.php?f=2&t=70369&hilit=Q100+reduction+ratio
Another good search-word is Cute, that's what a lot of people refered to them when they came out.
by motomech
Dec 05 2019 8:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: mxus xf15 gear hub motor teardown
Replies: 7
Views: 928

Re: mxus xf15 gear hub motor teardown

It's usually a dead end to take the Chinese spec.s literaly and their graphs have been shown to contribute to early dementia.
There's a Ezee "350" very high speed range motor in the Motor list @ the Ebike CA (Grin) sim. if you want something to play around w/.
by motomech
Dec 02 2019 10:27pm
Forum: E-Bike Technical
Topic: Should I fuse my battery?
Replies: 11
Views: 1505

Re: Should I fuse my battery?

The fuseable link is placed somewhere that won't be a problem if the wire burns.
6 M/M bullet connectors make pretty good fuseable links w/ a 48 Volt system.
Don't ask me how I know that.
by motomech
Nov 27 2019 10:01pm
Forum: E-Bike Technical
Topic: Bafang 20” motor in a 24” rim
Replies: 13
Views: 1110

Re: Bafang 20” motor in a 24” rim

If you look at the spec ratings on the PSW Power webpage, it's listed as a "261" motor, which I assume means 261 RPM @ 36 Volts. Since I only have experience w/ the Q series of minis (mostly Aikemas), I can only make some more assumptions, like; The 261 Would equate to the "260" mid-speed range, the...
by motomech
Nov 26 2019 2:51pm
Forum: E-Bike General Discussion
Topic: 52V battery/ 48V controller / 250W motor?
Replies: 9
Views: 911

Re: 52V battery/ 48V controller / 250W motor?

I was wondering if I can use 52V battery with 250W gear motor with 48V controller. If the 48V controller is pulling 20A which equates to 1000W but since the motor is rated 250-500W can I cut/shave shunt controller to lets say 10A and that equals to 520W. Is this ok? Serious lack of info in this que...
by motomech
Nov 13 2019 7:38pm
Forum: Motor Technology
Topic: 2WD (2 Controllers + 1 LCD) Setup - Advice?
Replies: 7
Views: 1038

Re: 2WD (2 Controllers + 1 LCD) Setup - Advice?

For a 2WD Bike that is running 2 of the same controllers, can the wires from the LCD be "spliced" into 1 feed? That way to give the pedal assist evenly to each wheel and whatnot? I think not. If you are talking about the "KT" style sine wave controllers, the display is intergral to the operation of...
by motomech
Nov 13 2019 6:57pm
Forum: E-Bike General Discussion
Topic: How to remove a stuck pivot bolt
Replies: 34
Views: 2934

Re: How to remove a stuck pivot bolt

Air hammer?
They are cheap at Harbor Freight, but you need a compressor.
by motomech
Nov 12 2019 8:50pm
Forum: E-Bike General Discussion
Topic: Convert 2 Classic MTBs to eBikes
Replies: 14
Views: 1328

Re: Convert 2 Classic MTBs to eBikes

I agree with all of the above. In fact, I would say you need a better donor bike to start with. Since you haven't filled out your profile, we don't know where you are, but out West Craigslist usually has plenty of 2003 and up used MXB's to look at. Bikes in these years are new enough to have disc br...
by motomech
Nov 12 2019 8:14pm
Forum: E-Bike Technical
Topic: PAS Issue on Q100C motor
Replies: 8
Views: 604

Re: PAS Issue on Q100C motor

Turn the sensor around 180 degrees. With the supplied bracket, it's possible to line up one of the screws. And like all the PAS systems I've installed, the sensor has to be very close to the disc.
by motomech
Nov 08 2019 9:37pm
Forum: Battery Technology
Topic: Lipo slightly puffy
Replies: 32
Views: 2329

Re: Lipo slightly puffy

I'm glad I'm getting replies that basically say not to be too concerned. There are so many horror stories of lipos catching fire, exploding, etc., that when I see mine begin to puff slightly, I think the worst. Not that I'm afraid of burning my house down--as I mentioned before, I keep them stored ...
by motomech
Nov 08 2019 9:24pm
Forum: E-Bike Technical
Topic: Direct Drive Vs Geared Hub at 48V possible replacement
Replies: 32
Views: 1859

Re: Direct Drive Vs Geared Hub at 48V possible replacement

Right now I have a 7 Speed freewheel on the hub motor though the gearing is 9 speed. The reason for this is that with such a big motor only a 7 speed would fit. If I get the Q128C would a 9 speed cassette fit? I haven't used the Q128 (I'd like to), but from what I've read, it seems like a Q100 on s...
by motomech
Nov 06 2019 11:16pm
Forum: E-Bike General Discussion
Topic: Upgrade controller and display info.
Replies: 12
Views: 611

Re: Upgrade controller and display info.

Speed is about 19mph using throttle and 24mph when a single grey wire accidentally unplugged. I'm not sure how dis-connecting one wire can boost the top speed 5 mph, but 24 mph is unbelievably fast for a sm. wheel bike on 48 Volts! Those motor spampings are still a mystery of the East, but it does ...
by motomech
Nov 06 2019 7:46pm
Forum: E-Bike General Discussion
Topic: Upgrade controller and display info.
Replies: 12
Views: 611

Re: Upgrade controller and display info.

Leave it alone, the controller and display are the same as every other budget sine wave "Torque Imitation" system out there and they all have 5 levels of PAS. And neither the controller nor display will add to the top speed, that is batt. Volts and you don't want to mess w/ that either. You might in...