Search found 2814 matches
- Jan 10 2021 8:53pm
- Forum: General Discussion
- Topic: Looking for this tool to remove my front chainring on a bewo middrive
- Replies: 10
- Views: 445
Re: Looking for this tool to remove my front chainring on a bewo middrive
I would Give your mini torch a go. I use a plumbers torch most times. Just hot to the touch. Some times just a bit of heat on a alloy part will free it. It will grow three times what the steel will and also heats much faster. On thread direction, the cutouts will allow you to see at least the first ...
- Jan 10 2021 10:52am
- Forum: General Discussion
- Topic: Looking for this tool to remove my front chainring on a bewo middrive
- Replies: 10
- Views: 445
Re: Looking for this tool to remove my front chainring on a bewo middrive
There is enough thread visible in the cut outs to verify the thread direction. From here it appears to be left hand. Make sure before beating on it. Use a heavier hammer and a sturdier punch. Warm the alloy spider with a torch or heat gun and quench it with penetrating oil or water and let cool. If ...
- Jan 09 2021 1:34pm
- Forum: E-Bike Non-hub Motor Drives
- Topic: Will TSDZ2 or BBS02 fit on this bike?
- Replies: 10
- Views: 528
Re: Will TSDZ2 or BBS02 fit on this bike?
Metal bike frames are very easy to reshape - modify (DENT) where and if needed. Just lay a hammer handle at the spot and hit it with a soft blow type hammer. BB shells on them are relatively thin so fitting into motor gap should be of little concern. Would be great is you could get one offset crank ...
- Jan 09 2021 9:29am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Trek Fuel - Small block left drive first build
- Replies: 12
- Views: 687
Re: Trek Fuel - Small block left drive first build
There are many threads on throttle choices. Do a google search of the site to best find them. If your add a CA (Cycle analyst) you will have some control over throttle ramps which help greatly. I have a sabvoton 72150 on my GNG 450. Much like the small block with surface mount magnets. It has never ...
- Jan 04 2021 2:11pm
- Forum: E-Bike Non-hub Motor Drives
- Topic: Trek Fuel - Small block left drive first build
- Replies: 12
- Views: 687
Re: Trek Fuel - Small block left drive first build
LMX was running something very much like I am building. Mine will be both a floating type disc and sprocket mounted to a hub suitable to accept 5.25 BC kart sprockets and common Avid disc that has been removed from its hub. Belt does have a bit of latitude on chain line. Agree that the solid mounted...
- Jan 04 2021 4:44am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Trek Fuel - Small block left drive first build
- Replies: 12
- Views: 687
Re: Trek Fuel - Small block left drive first build
Could the smallest available brake rotor fit inside the mounting plane of the sprocket? You won't need a lot of braking force if you use regen to do most of the work then modulate with friction brakes. I believe you can. You still need to pocket out the center of the sprocket hub to clear the calip...
- Jan 03 2021 12:14pm
- Forum: Large EV General Discussion
- Topic: Polaris Ranger EV
- Replies: 38
- Views: 32156
Re: Polaris Ranger EV
I would not assume it is just programing. These can charge above 55v with the wet batteries. I have not pulled it apart to check cap values. With regen - slide braking as programed, you want a bit of head room.
- Jan 03 2021 11:03am
- Forum: Large EV General Discussion
- Topic: Polaris Ranger EV
- Replies: 38
- Views: 32156
Re: Polaris Ranger EV
Not sure if they program a high voltage cut off but would tread softly. I know from experience that you can run it near dead with the wet batteries. Sevcon lists a size 6 in 36 -48 volt and 72 - 80v models. The 36- 48v which is most likely in them has a 69.6v max listed.
- Jan 03 2021 7:46am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Trek Fuel - Small block left drive first build
- Replies: 12
- Views: 687
Re: Trek Fuel - Small block left drive first build
Here is a LTR build that was on FB. Looks to clear well. https://scontent-lga3-1.xx.fbcdn.net/v/t1.0-9/131924362_5476309789061160_2095480070313512664_o.jpg?_nc_cat=103&ccb=2&_nc_sid=110474&_nc_ohc=ffDp2cBB7C4AX_xAAor&_nc_ht=scontent-lga3-1.xx&oh=f774a51a5fe211e49f557688d3a3551a&a...
- Jan 03 2021 5:55am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Trek Fuel - Small block left drive first build
- Replies: 12
- Views: 687
Re: Trek Fuel - Small block left drive first build
Wax! ? Certainly not a place for mobile oils. I am designing a dual mount hub now for a 92 tooth 219 sprocket, and 160mm rotor. Need roughly .7 inch spacing to clear most calipers I have checked. Need to make sure spoke and tire clearances are suitable. A few builds have done this so far and in use.
- Dec 16 2020 8:40am
- Forum: Forum Rules and Features
- Topic: How do you feel about 'other toxic discussions' on this forum?
- Replies: 39
- Views: 1026
Re: How do you feel about 'other toxic discussions' on this forum?
I am not at all interested in OTC and wish I could place all of the threads on a ignore list and not be pulled into it via quick links. I would rather think a member a fool then to read some of the crap they will commit to in writing. I avoided ES for months at a time after reading some of the posts...
- Nov 18 2020 10:08am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Light, high torque, powerful mid drive motor choices
- Replies: 42
- Views: 6588
Re: Light, high torque, powerful mid drive motor choices
Nice size! 118x51mm 1400 grams and 12KW on 14s. https://ae01.alicdn.com/kf/H3c9c2ab0589e4abf9a14077fc2236f41F/MAIT-TMU15L-M30-100KV-Multirotor-Motor-12-16S-Brushless-Motor-For-Drone-Agricultural-Drones-Thrust-50KG.jpg_q50.jpg rushless-Motor-For-Drone-Agricultural-Drones-Thrust-50KG.jpg_q50.jpg And l...
- Sep 02 2020 12:39pm
- Forum: E-Bike Non-hub Motor Drives
- Topic: Bafang mid drive won't fit, any other options?
- Replies: 7
- Views: 541
Re: Bafang mid drive won't fit, any other options?
If determined, You could grind away the BB shell to form fit the motor placement. If its a bit too thin- breaks though, you could always lay in a few layers of carbon fabric to stabilize it and make it custom form fit.
- Jul 20 2020 7:25am
- Forum: E-Bike General Discussion
- Topic: Do I need I need to wrap this?
- Replies: 8
- Views: 352
Re: Do I need I need to wrap this?
My late electrician would save a bunch of wonder bread bags for this type of insulation duty. He would wrap lugs and larger connections as much as needed (voltage, vibration, and impact) to protect sharp edges from cutting through and cover with a layer of ele tape to keep it in place (shrink tube w...
- Jul 15 2020 7:52am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Bafang BBSxx - fault finding and fixes
- Replies: 1054
- Views: 186060
Re: Bafang BBSxx - fault finding and fixes
Agree Tom. They should have added thermal roll back on this setup. Interesting to see the phase runner and ca setups on the HD. That would be a big improvement to the stock setup. Not sure the BBS02 is worth trying to retro fit with all it's mechanical shortcomings. New style stock controller and at...
- Jul 11 2020 6:12pm
- Forum: E-Bike Non-hub Motor Drives
- Topic: Bafang BBSxx - fault finding and fixes
- Replies: 1054
- Views: 186060
Re: Bafang BBSxx - fault finding and fixes
It has a 46 tooth chain ring on it and a 32 rear. May need to go up to a 42 or bigger rear to have avoided the controller overheat. My 110 pound grand son was on it pedaling some 50 -55 rpms next to me when it went dead. Just on low pas level settings, maybe 40% power. Center leg again. We were abou...
- Jun 28 2020 8:39am
- Forum: E-Bike Non-hub Motor Drives
- Topic: Bafang BBSxx - fault finding and fixes
- Replies: 1054
- Views: 186060
Re: Bafang BBSxx - fault finding and fixes
I have a early BBS02 with another blown controller. It lost a leg on a steep climb while on a low (30 -40% current) pas setting but was steep enough to slow the cadence significantly even with significant rider input. Total weight was under 170 pounds but enough. Unfortunately, finding they changed ...
- May 19 2020 8:56pm
- Forum: Large EV General Discussion
- Topic: Polaris Ranger EV
- Replies: 38
- Views: 32156
Re: Polaris Ranger EV
The chassis wire -switches- lights are 12v, and share many of the Ice components. I most likely will leave a second- 12v battery in it if easier. May make it easier to have a onboard LI battery heater connected for those times it may be needed and no outlet is near by for the overnight ac heater set...
- May 12 2020 5:22pm
- Forum: Motor Technology
- Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
- Replies: 1885
- Views: 246344
Re: Leaf / leafmotor / leafbike high efficiency 1500w motor
It’s consistent across the entire range I’m aware of. But to your point, now that I looked it up in a table, I find that the difference in gauge for a 2:1 cross-sectional area ratio is in fact 3, not 2. :oops: And the 2:1 ratio is exact, not approximate. Yes the 3x rule works, but that leaves you p...
- May 12 2020 8:04am
- Forum: Motor Technology
- Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
- Replies: 1885
- Views: 246344
Re: Leaf / leafmotor / leafbike high efficiency 1500w motor
the approximate ratio of cross-sectional area is 2:1 Yes, and if your into approximates, that is suitable. Unfortunately that only holds relatively consistently for part of the range. Fine multi Stranding, also makes it difficult to compare physically and the open metal wire gauges difficult to use...
- May 11 2020 7:21pm
- Forum: Motor Technology
- Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
- Replies: 1885
- Views: 246344
Re: Leaf / leafmotor / leafbike high efficiency 1500w motor
ZeroEm wrote: ↑May 11 2020 10:09am The leafmotor from leafbikes Called "black magic" comes with 3mm phase wires, between 8-9 gauge awg Which gauge converter are you using? The term "Gauge" varies with materials. To my understanding, Tradition is from firearms making balls from a...
- May 01 2020 4:27pm
- Forum: Large EV General Discussion
- Topic: Polaris Ranger EV
- Replies: 38
- Views: 32156
Re: Polaris Ranger EV
14S, 7 of the leaf modules should be a direct drop in. You may need check the stock controller programing for a suitable low voltage cut off for Li packs. Put a voltage indicator or alarm on the pack so you don't get too low if your exploring. The BMS I am waiting for will take care of that issue. I...
- May 01 2020 3:46pm
- Forum: E-Bike General Discussion
- Topic: Broken Spokes (On Going Problem)
- Replies: 63
- Views: 2364
Re: Broken Spokes (On Going Problem)
+1 on the stronger / heavier rim. Glad to see your replacing all the spokes. Any of the ones not broken, would most likely have been compromised structurally. The limiting factor to building the most stable wheels is the rim in most cases. It is what limits how tight you can string it also. It is al...
- May 01 2020 10:58am
- Forum: General Discussion
- Topic: Best power to weight hub motor..?
- Replies: 25
- Views: 1082
Re: Best power to weight hub motor..?
I posted some of the motor choices in another thread. https://endless-sphere.com/forums/viewtopic.php?f=28&t=68950 The 20KW would make a good flying motor IMO. Listed at 5KG It looks to be able to run on reasonable low voltage. http://mymobilemms.com/OFFTHEGRIDWATER.CA/images/238-50b.jpg With a ...
- Apr 30 2020 7:39pm
- Forum: General Discussion
- Topic: Best power to weight hub motor..?
- Replies: 25
- Views: 1082
Re: Best power to weight hub motor..?
Flying ebike?


