Search found 3641 matches

by motomech
May 06 2022 6:07am
Forum: EBike General Discussion
Topic: Puffy lipos
Replies: 3
Views: 538

Re: Puffy lipos

This might be a question better put to the RC forums but my answer is yes, I do compress my LiPoly. Years ago, when I rode my Lipoly hard and "put it up wet", I did have a couple of cells "puff-up" and started to tightly wrap my bricks with Gorilla tape. The general consensus aro...
by motomech
May 01 2022 11:33pm
Forum: EBike Technical
Topic: looking to build a solar E-bike charging system
Replies: 18
Views: 407

Re: looking to build a solar E-bike charging system

I need as many panels as we can fit and afford. That's right. I built a sm solar charging system to use when off the grid in my RV many years ago and it was based on the MT-72. Solar panels to MT-72 to RC charger. I don't remember all the details but the take-aways were; I had to use 4) of the sm. ...
by motomech
Apr 30 2022 2:38pm
Forum: EBike Technical
Topic: AKM 100 250w vs 350w, how do they compare?
Replies: 10
Views: 366

Re: AKM 100 250w vs 350w, how do they compare?

So I'm really not willing to stretch much more than than total 135mm. If I cannot make it work it'll be a front hub..... A frt mount would be the obvious and easiest solution, especially since you are still harbouring the notion that you will want to go back and forth between powered/unpowered. I'm...
by motomech
Apr 28 2022 8:04pm
Forum: EBike Technical
Topic: AKM 100 250w vs 350w, how do they compare?
Replies: 10
Views: 366

Re: AKM 100 250w vs 350w, how do they compare?

Regarding Q100CST vs Q100H, you say in your messages that with a 7 speed freewheel it ends up being ~134mm, BMS says the same. But TopBikeKit says its 138m (!). See their diagram here: http://www.topbikekit.com/AKM-100H%20Rear%20motor.png I sent an email and they confirmed its 138mm at their end fo...
by motomech
Apr 27 2022 4:49am
Forum: EBike Technical
Topic: AKM 100 250w vs 350w, how do they compare?
Replies: 10
Views: 366

Re: AKM 100 250w vs 350w, how do they compare?

Sometimes I will ride the bike without the battery so I'm trying to keep it light, no resistance is important and thinking about it, keeping the cassette also matters in this case. You might do this,....once. Although road bike/lycra types claim to do this, more mortal ebike riders quickly tire of ...
by motomech
Apr 25 2022 3:01am
Forum: EBike Technical
Topic: AKM 100 250w vs 350w, how do they compare?
Replies: 10
Views: 366

Re: AKM 100 250w vs 350w, how do they compare?

I'm tempted to get one that comes in 260 RPM (not 201 but not 328 due to mix of flat, hills and red lights in London)? How fast do you want to go in the flat? In a 26" whl.: A "260" speed-range Q100 on 36 Volts does about 19 to 20 MPH. A "260" speed-range Q100 on 48 Volts d...
by motomech
Apr 18 2022 4:33pm
Forum: EBike General Discussion
Topic: Used Jump Bafang Hub for Budget Build?
Replies: 75
Views: 2001

Re: Used Jump Bafang Hub for Budget Build?

I think time spent on "re-inventing" the "Jump" wheels is mis-placed. The materials and spoke patterns used are fine for their intended usage, after all, these are front mounted and will receive much less stress than a rear wheel, In that vein, I took a Jump whl. assembly, droppe...
by motomech
Apr 17 2022 9:48pm
Forum: EBike Troubleshooting
Topic: Salvage my hub motor?
Replies: 7
Views: 204

Re: Salvage my hub motor?

The first thing I'd say is that isn't a 5kw (five thousand watt) motor. Looks just like the 500 (five hundred) watt "9C" motors I used to use. It's possible an inexpensive 9C motor core would drop in to the housing and then he wouldn't have to relace the assembly. Show us a pic. Then cut ...
by motomech
Apr 17 2022 9:33pm
Forum: EBike General Discussion
Topic: Used Jump Bafang Hub for Budget Build?
Replies: 75
Views: 2001

Re: Used Jump Bafang Hub for Budget Build?

So I looked at the "bent" whl. pics., they are not "bent", he's just covering his butt. They just need trued, it's no big deal, the tire is not even skuffed. Any shop could do it. Heck, even I could do it, maybe an hour to an hour and a half. As far as how to install these units,...
by motomech
Apr 17 2022 9:26pm
Forum: EBike General Discussion
Topic: Used Jump Bafang Hub for Budget Build?
Replies: 75
Views: 2001

Re: Used Jump Bafang Hub for Budget Build?

I received 2 Jag353 motor/whl. assemblies well packaged and in perfect cond. Timely too.
I still have one motor unused by me, but I doubt I could ship it for less money than what he sells and ships them for, so I have another paperweight.
by motomech
Apr 17 2022 7:05am
Forum: EBike General Discussion
Topic: Used Jump Bafang Hub for Budget Build?
Replies: 75
Views: 2001

Re: Used Jump Bafang Hub for Budget Build?

Chalo, is there a rim with the same ERD which can be used to remount the stock spokes to the new rim? One of my wheels was way bent and the brake disks were warped maybe due to storage Have you tried to true the whl.? Loosen all the spokes and see where you at. If the rim hasn't taken a really hard...
by motomech
Apr 15 2022 7:18pm
Forum: EBike General Discussion
Topic: Strongest Triangle Battery Bag
Replies: 3
Views: 332

Re: Strongest Triangle Battery Bag

I got 6 or 7 years out of the triangle bag from this guy; https://www.falconev.com/ Some of the seams are starting to septerate, but it's still intact. But it's starting to get hard as the AZ weather has dried out the material. My bike was an XL and the XL bag fit perfectly and I would advise an XL ...
by motomech
Apr 14 2022 5:58am
Forum: EBike General Discussion
Topic: Idea for front forks torque arms.
Replies: 44
Views: 1206

Re: Idea for front forks torque arms.

Nobody ever looks at a sticky. I think I covered the installation on alloy tube forks in post #10 w/ a link to the Ebike CA tutorial. That might have been an opportunity for the OP to say, No, that won't work because...... The only reason I'm still following this is I'm curious as to why his motor w...
by motomech
Apr 13 2022 10:24pm
Forum: EBike General Discussion
Topic: Idea for front forks torque arms.
Replies: 44
Views: 1206

Re: Idea for front forks torque arms.

Do you have a picture? No kidding, it would have saved folks trying to helpful a lot of time. Asides that it is some kind of "one-off" application, I'm still unclear what the he trying to mount the Jump motor on. I need to get unlazy and go out and look at one, but based on the pics on th...
by motomech
Apr 13 2022 6:46pm
Forum: EBike General Discussion
Topic: Idea for front forks torque arms.
Replies: 44
Views: 1206

Re: Idea for front forks torque arms.

Do you have a picture?
No kidding, it would have saved folks trying to helpful a lot of time.
Asides that it is some kind of "one-off" application, I'm still unclear what the he trying to mount the Jump motor on.
by motomech
Apr 10 2022 4:34pm
Forum: EBike General Discussion
Topic: Hats off to PSW Power.
Replies: 0
Views: 203

Hats off to PSW Power.

I ordered a controller almost a year ago and when it didn't show up after a month or so, I just chalked it up to the Covid mess. It was for a spare and as the time went by I kind of forgot about it. Last week, I thought I would see if I could log in, and when that worked I left a simple message that...
by motomech
Apr 07 2022 10:38pm
Forum: EBike General Discussion
Topic: Idea for front forks torque arms.
Replies: 44
Views: 1206

Re: Idea for front forks torque arms.

Not sure how installing TA'a on a frt. mount suddenly got so complicated, 100's, if not 1000's of frt. mounts have been done. If the fork drop-out width is 100 mm's, there IS space to to put on the TA inside the axle nut. You should be looking at one , or better, two from the TA selection @ Ebikes C...
by motomech
Apr 06 2022 7:02am
Forum: EBike General Discussion
Topic: Used Jump Bafang Hub for Budget Build?
Replies: 75
Views: 2001

Re: Used Jump Bafang Hub Good for Budget Build?

Spaceship wrote; I'm looking at making a second e-bike for my gf to use when she visits. She is quite small and won't want to go very fast (20-30 kmph max probably) so I am looking at putting together a bike with a smaller hub. lighter battery, and I would like to keep it budget friendly. If you rea...
by motomech
Apr 04 2022 6:41am
Forum: Bike Mechanical & Structural
Topic: Purchasing advice for new puncture proof heavy CARGO HEAVY duty ebike tires
Replies: 78
Views: 1358

Re: Purchasing advice for new puncture proof heavy CARGO HEAVY duty ebike tires

Although they be a little difficult to find, Kenda (A quality brand, BTW) make extra thick tubes that are the best I've used. With the thick tread of "flat-resistant" tires, combined the thick tubes, the bike starts to get a little "squirrely" as they start to roll around on all ...
by motomech
Apr 04 2022 5:49am
Forum: EBike General Discussion
Topic: Used Jump Bafang Hub for Budget Build?
Replies: 75
Views: 2001

Re: Used Jump Bafang Hub Good for Budget Build?

I bought a couple of the "Jump" clearance motor/wheel assemblies from a vendor in the States that came with Schwalbe tires. Everything arrived in very gd. cond. and it seemed to me they were little used. The whl. builds were quality and the rims were straight, so I mounted one "as is&...
by motomech
Mar 08 2022 10:37pm
Forum: EBike Technical
Topic: Help on hunting e bike
Replies: 33
Views: 789

Re: Help on hunting e bike

I'll say this I know almost nothing on pedal bike last had one around when I was 10 or 12 years old now 41. Got dirt bikes and lived on several hundred acres so never had a desire to pedal after that . Don't know much about electric motors . My electrical knowledge is mostly for vehicles and househ...
by motomech
Mar 02 2022 3:17am
Forum: Bike Mechanical & Structural
Topic: Thai drag bike tires.
Replies: 26
Views: 1059

Re: Thai drag bike tires.

I gotta a 'Busa story. In the late '90's, I was wrenching at a Mega dealership in Wash. DC and we received the first 'Busa in the area. The service manager (A drag racer) and I unboxed it and rolled it out in the parking lot. It idled smoothly, gently rumbling at 1100 rpm and I started to wonder wha...
by motomech
Mar 02 2022 2:42am
Forum: Bike Mechanical & Structural
Topic: Thai drag bike tires.
Replies: 26
Views: 1059

Re: Thai drag bike tires.

I raced big wheel 57cc and 85cc mini's back in the middle 90's and used those tires. They were either Dunlops or Michelins and were niether inexpensive nor easy to get. I can't remember the exact size, something like 80/70 X 17 and from a distance they look like someone mounted an intertube on the r...
by motomech
Jan 19 2022 4:23pm
Forum: EBike Technical
Topic: 18s Lipo pack for eBike, have I got all my basis covered?
Replies: 2
Views: 234

Re: 18s Lipo pack for eBike, have I got all my basis covered?

I think what you are talking about is running 18S and then "breaking the string" to parallel charge 6S. If so, why use a 8S charger? Even so, what you are proposing is super time consuming and frought w/ problems. I've found that parallel charging LiPoly bricks doesn't allow one to keep tr...
by motomech
Dec 26 2021 6:45pm
Forum: EBike General Discussion
Topic: How many volts do you run on your daily driver ebike, emoped or eBSM?
Replies: 30
Views: 1461

Re: How many volts do you run on your daily driver ebike, emoped or eBSM?

For my geared hub motor systems powered by LiPoly, I've settled on 14S, which makes a nominal 51 Volt pack and the Volts value does matter. It matters because this range is the highest one can go without paying much attention to: 1) Wire gauge, easy to work with 12 and 14 awg can be used. 2) Cheap a...