Search found 395 matches

by zukster
Oct 16 2019 4:59pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Yes, I'm aware. We are talking about the G310, correct? I can't tell how you managed to route them out. https://i.imgur.com/mdgisRG.jpg I did this on a Cute 100 CST and may do it on a G370 rear as soon as I can get my hands on another one. I had problems with the G370 I was working on. For the Cute...
by zukster
Oct 16 2019 3:11pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I'll post it to its own thread once I install it into a clear case and take some pictures. Its pretty simple. Also, for those who are concerned about cutting off the throttle unexpectedly, many of these boards have an alarm buzzer. When the temp gets above 120 or so, you can set it up to sound the a...
by zukster
Oct 16 2019 12:31pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I can post the circuit but I'm not opening up the motor again until it needs servicing. If you do a thorough Google serach, you can find a few examples of other people epoxying thermosters to motor windings. I think automotive silicone would probably work too. You need to get the wire out where the ...
by zukster
Oct 16 2019 9:50am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

For a hub motor you could loose power from any number of things: low batteries, loose cables,etc. Use this technique your own discretion. I'm fine with it. I generally know when I'm pushing my small motors too hard. Use a CA instead if you want power roll-back to prevent overheating. I don't use a C...
by zukster
Oct 16 2019 8:51am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I just built a little throttle cutoff harness for over-volted/watted motors that uses a mini 5v thermostat board, that cuts off the throttle when the motor internals hit 120 degrees Celsius. LM YN Digital Thermostat Module DC 5V -10℃ to +210℃ Electronic Temperature Control Module Switch Waterproof S...
by zukster
Jan 27 2019 2:20pm
Forum: E-Bike Technical
Topic: Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor
Replies: 10
Views: 1918

Re: Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor

The YTW-06 is impressively light at about 3 lbs. How much have a beating have you subjected it to? I use my Phaserunner Q100CST 72V LiPo combo for on-road and off-road cross-country mountain biking and as long as you don't get too carried away with over-powering it, it works fine. I had a bit of tro...
by zukster
Jan 27 2019 2:05pm
Forum: E-Bike Technical
Topic: Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor
Replies: 10
Views: 1918

Re: Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor

Bear in mind there are two versions of the Q100CST out there too. The one bmsbattery was selling at first several years back was silver and weighed about 5 lbs. The newer ones I bought within the few years are black and they are about 4.5 lbs. They have slightly different hub freewheel mechanisms to...
by zukster
Jan 26 2019 12:05pm
Forum: E-Bike Technical
Topic: Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor
Replies: 10
Views: 1918

Re: Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor

The hub freewheel is built into the cap that screws onto the main body. Its built-in and I don't think its serviceable. I have yet to wear out a freewheel on any hub, electric or non, so I would not worry about it. The freewheel mechanism has a bit of engagement lag compared to a higher end Shimano ...
by zukster
Aug 14 2018 12:53pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Is that slotted anti-rotation washer a standard one made for a hub with a 12mm wide axle and a 10mm flat spot width, or is it smaller and specially made for the G310? If its the 12mm/10mm size, I have some 1/8" titanium torque arms I bought last year from a guy in the UK that look like they'll proba...
by zukster
Aug 14 2018 9:50am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

Much thanks for the comments. I have not seen the hub up close, so I didn't know there was a flat on the axle for the anti-rotation washer. That does look like it would be a tough fit. I'll think about this a bit more now.
by zukster
Aug 12 2018 3:25pm
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 174
Views: 33672

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I'm going to give this a bump re torque arm ideas for the rear G310. I want to try the G310 on my carbon frame mountain bike but am concerned about rear spin out. I currently run a Q100CST with a torque arm attached to the 10mm slotted 12mm axle. This works very well. I had emailed Justin previously...
by zukster
May 27 2018 11:08am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1247
Views: 251809

Re: Compact Field Oriented Controller, ASI + Grin, limited run

I've been using these small inexpensive waterproof connectors from Lee's and quite like them https://leeselectronic.com/en/product/29257.html I like the Higo's for motor phase hall wiring, but the above are smaller for throttle or lights. I was having problems with throttle wires shorting with the J...
by zukster
May 17 2018 11:58pm
Forum: E-Bike Technical
Topic: 11-50T Cassette on Cute Q100CST Setup
Replies: 16
Views: 4185

Re: 11-50T Cassette on Cute Q100CST Setup

The 10 speed sram shifter has a cable pull of 3.1. The 12 speed derailleur has a cable pull ratio of 1.12. So that would equal a cassette cog pitch of 3.47. A real 10 speed cassette has a cog pitch of 3.95, so that combo is way to far off to work :cry:
by zukster
May 25 2017 4:49pm
Forum: E-Bike Technical
Topic: Open a q128c
Replies: 15
Views: 2164

Re: Open a q128c

RyanC wrote:I went to a auto mechanic and they got it open easy-peasy.
I did the exact same thing for my first motor, then I got a big vice for the next one.

What device is giving the 06_Info error? There are a number of tests that you can try here:

http://www.ebikes.ca/learn/troubleshooting.html
by zukster
May 21 2017 4:45pm
Forum: E-Bike Technical
Topic: Open a q128c
Replies: 15
Views: 2164

Re: Open a q128c

I made a simple tool with a piece of plywood and a brake disc rotor. https://endless-sphere.com/forums/viewtopic.php?f=2&t=86991 since your hub is still is the wheel you can simply clamp the cap that unscrews in a vice really hard, the turn the wheel counter-clockwise. I don't think I could have ope...
by zukster
May 21 2017 11:27am
Forum: E-Bike Technical
Topic: 11-50T Cassette on Cute Q100CST Setup
Replies: 16
Views: 4185

Re: 11-50T Cassette on Cute Q100CST Setup

The Q100needs to be kept spinning fast to get its power. That's pretty much my experience as well. I have trained myself to go easy on the throttle when not moving fast. I learned this lesson after burning out a couple of small Bafang 8FUN motors. Getting the 201RPM motor rather that the 328RPM hel...
by zukster
May 20 2017 11:03am
Forum: E-Bike Technical
Topic: Q100C CST 201RPM BMSBattery Hub Clutch Roller Spring Upgrade
Replies: 4
Views: 1233

Re: Q100C CST 201RPM BMSBattery Hub Clutch Roller Spring Upg

Are you saying that the PR doesn't sync properly with the motor under some conditions? During tuning. The PR has trouble with syncing to these little high geared (14.2:1) motors, even after the autotune, so manual fine tuning is needed. This is the second motor I have tuned; the other one had a sli...
by zukster
May 20 2017 10:55am
Forum: E-Bike Technical
Topic: 11-50T Cassette on Cute Q100CST Setup
Replies: 16
Views: 4185

Re: 11-50T Cassette on Cute Q100CST Setup

26 inch wheel. 42T on the front chainring, so road gearing is like a standard mountain bike with a normal 22/32/42 front triple, when on the 11T and 42T - just fast enough. Not quite road bike speeds, but its a mountain bike. For the trails and steep hills, it could be a little lower when in 50T, wh...
by zukster
May 19 2017 3:14pm
Forum: E-Bike Technical
Topic: Q100-CST LUBRICATION
Replies: 4
Views: 831

Re: Q100-CST LUBRICATION

I think the white lithium grease is a good choice too. I probably would have used that if I had some in stock.
by zukster
May 19 2017 3:04pm
Forum: E-Bike Technical
Topic: Q100C CST 201RPM BMSBattery Hub Clutch Roller Spring Upgrade
Replies: 4
Views: 1233

Re: Q100C CST 201RPM BMSBattery Hub Clutch Roller Spring Upg

As I understand how a ramp and roller (Sprag) clutch works, once the roller is in contact with the ramp, it's the "pinching" action that holds the roller in place. I'm basing this on how the Constant Velocity Transmissions(originally called Salisbury Transmissions) on motor scooters work. They don'...
by zukster
May 19 2017 11:28am
Forum: E-Bike Technical
Topic: Q100C CST 201RPM BMSBattery Hub Clutch Roller Spring Upgrade
Replies: 4
Views: 1233

Q100C CST 201RPM BMSBattery Hub Clutch Roller Spring Upgrade

When I tried to setup my Q100C CST with Grin's Phaserunner(PR), I quickly destroyed the stock freewheel clutch springs while dialing in the motor after doing the PR software's autotune. I think a lot of other people like this light rear hub motor, so I thought I'd post this info in case anyone else ...
by zukster
May 19 2017 10:59am
Forum: E-Bike Technical
Topic: Q100-CST LUBRICATION
Replies: 4
Views: 831

Re: Q100-CST LUBRICATION

I was wondering about that too. I used a light coating of high temp silicone disk brake quite. Its is not too thick when heated up and not quite as slippery as synthetic or Teflon gear lubes. I think a light bike based bike lube like Tri-Flow would be too slipery as it has Teflon. 3-in-1 machine oil...
by zukster
May 16 2017 4:35pm
Forum: E-Bike Technical
Topic: 11-50T Cassette on Cute Q100CST Setup
Replies: 16
Views: 4185

Re: 11-50T Cassette on Cute Q100CST Setup

Where did you find a 38 cog back in the 90's, and what derailleur could shift that big? That is a pretty impressive feat. I used to build 7 speed 12-32 dura ace freewheels with newer HG cogs for the big ones before the cassette motor hubs came out. I know its a lot of work to match everything up. Th...
by zukster
May 16 2017 11:19am
Forum: E-Bike Technical
Topic: what's the proper way to install torque arms?
Replies: 11
Views: 2975

Re: what's the proper way to install torque arms?

What you did is exactly right for your particular frame. then have it tack welded so it can't swivel at the pivot anymore. That is a really good idea. What I did is upgrade the hardware to metric 12.9 which is about the same as imperial grade 8. Canadian Tire sells metric Hillman Class 12.9 Socket ...