Search found 2961 matches

by motomech
Feb 24, 2018 3:08 pm
Forum: Battery Technology
Topic: Multistar LiPO C rating and realistic cont. discharge
Replies: 6
Views: 65

Re: Multistar LiPO C rating and realistic cont. discharge

Nothing is on sale w/ the frequency and variety like the Multistar. The Multistar is ok for my low powered systems, but before I switched to it, I was a Turnigy 20C fan. I still use a small aux. pack (12S/5 Ah) of the Turnigy that I swap back and forth w/ a MS pack of the same capacity and I can rea...
by motomech
Feb 23, 2018 9:29 pm
Forum: E-Bike General Discussion
Topic: Catastrophic Fork Dropout Crack - Torque Arm Saves the Day
Replies: 21
Views: 365

Re: Catastrophic Fork Dropout Crack - Torque Arm Saves the Day

I don't want to be difficult, but you are wrong on several points. Since torque arms are such an important safety item, I can't leave this discussion with the impression that I think what you did is anything approaching a good idea. I forgot to mention nothing. You only stated that you heated them t...
by motomech
Feb 23, 2018 6:32 pm
Forum: E-Bike General Discussion
Topic: New build, need opinions
Replies: 2
Views: 73

Re: New build, need opinions

I don't know anything about mid-drives, but I have some experience w/ low-Voltage, low C-rate LiPoly packs. I would say, in general, the fewer "Bricks" that will meet the design goals, the better. Not only does this help reduce the enevable "Rat's nest" of wires, it can open more charger solution op...
by motomech
Feb 23, 2018 4:33 pm
Forum: E-Bike General Discussion
Topic: Catastrophic Fork Dropout Crack - Torque Arm Saves the Day
Replies: 21
Views: 365

Re: Catastrophic Fork Dropout Crack - Torque Arm Saves the Day

From your thread dated 4/22/2015; https://endless-sphere.com/forums/viewtopic.php?f=3&t=68806&p=1038060&hilit=fork#p1038060 They are made out of U-bolt fittings. They were heated and bent in a vice. Some grinding was also done to allow the hose clamps to seat and hold the dropout snug to the fork. D...
by motomech
Feb 20, 2018 7:11 am
Forum: E-Bike Technical
Topic: Cute Q100H Autopsy & Modify 2017
Replies: 46
Views: 1274

Re: Cute Q100H Autopsy & Modify 2017

... Here's where things get really strange. What this tells me is that either: The wheel RPM (201 vs 260 vs 328) is determined by the motor winding and not by the gear ratio, or I received a 328 RPM motor, even though I ordered a 260 RPM There's convincing evidence of gear changes - but little-to-n...
by motomech
Feb 18, 2018 3:32 am
Forum: E-Bike General Discussion
Topic: Stealth & quick-ish e-bike for short commute, opinions
Replies: 20
Views: 627

Re: Stealth & quick-ish e-bike for short commute, opinions

The 1.5 inch tires make me nervous when rolling over grates. Once in Mexico, I actually had my frt. tire drop down into one, stopping the bike abruptly. The road was flooded and I didn't see it. The latest tire I'm using is the 1.85" WTB "Slick" w/ a Flat Guard layer. It's big for a 1.85", but still...
by motomech
Feb 18, 2018 3:22 am
Forum: E-Bike Technical
Topic: Cute Q100H Autopsy & Modify 2017
Replies: 46
Views: 1274

Re: Cute Q100H Autopsy & Modify 2017

WTF?! (insert pulling hair out emoji here) Why would they have a 328 rpm front Q100H and not offer that in the rear?! The only difference is in the axles. Argh! This is infuriating! The difference must be in the motor windings, and I am not going to strip down my motor to check it right now. I stil...
by motomech
Feb 17, 2018 9:42 pm
Forum: E-Bike General Discussion
Topic: Stealth & quick-ish e-bike for short commute, opinions
Replies: 20
Views: 627

Re: Stealth & quick-ish e-bike for short commute, opinions

"Bunny hopping", like pedaling w/. the motor off and shifting lot's of gears, are things people think they will do when they ride an Ebike, but once they do, they realize riding an Ebike is a different than riding a non--powered bicycle. And, I can''t think that would be much good for the plastic ge...
by motomech
Feb 17, 2018 2:26 pm
Forum: E-Bike General Discussion
Topic: Stealth & quick-ish e-bike for short commute, opinions
Replies: 20
Views: 627

Re: Stealth & quick-ish e-bike for short commute, opinions

The MTB would be overkill, for sure. It would be more comfortable, more solid, more fun, safer (in case I do hit a pothole or curb,... Trust me, you WILL hit a pot-hole eventually. I always thought that the "Pie" in the Pie motors meant they are as big as a pie plate. Not very stealthy. Around my n...
by motomech
Feb 17, 2018 10:36 am
Forum: E-Bike General Discussion
Topic: Looking for a chromoly rear rack, any suggestions?
Replies: 13
Views: 329

Re: Looking for a chromoly rear rack, any suggestions?

If your battery pack is so heavy that you worry that it will break the rear rack means that battery pack belongs in the triangle of the frame. The bike will handle and feel way better.
by motomech
Feb 13, 2018 10:23 pm
Forum: E-Bike Photos & Video
Topic: '98 Quintana Roo panamint mxus xf07 350w fr hub
Replies: 42
Views: 1134

Re: '98 Quintana Roo panamint mxus xf07 350w fr hub

Dude, you can kept playing w/ the numbers and make it anything you want to, but I'm telling you, it's a 260 rpm @ 36 Volts motor. In the first place, it's on the stickers on the motor. The 36V sticker means it's a 36 V rated motor. The 26 Inch sticker means it's a mid-speed motor for use in that siz...
by motomech
Feb 13, 2018 3:03 pm
Forum: E-Bike Photos & Video
Topic: '98 Quintana Roo panamint mxus xf07 350w fr hub
Replies: 42
Views: 1134

Re: '98 Quintana Roo panamint mxus xf07 350w fr hub

The motors are rated at 36 Volts.
by motomech
Feb 13, 2018 12:59 pm
Forum: E-Bike Technical
Topic: "Hot rod" ebike on the cheap
Replies: 9
Views: 541

Re: "Hot rod" ebike on the cheap

I don't think such a thing as a ""Hot rod" ebike on the cheap" exists.

I would suggest you read some of the threads by liveforphysics or drbass.
Even if, by some miracle you can out run the 66cc Girl, what would prevent them from installing something like the BBR Stage 4 motor?
by motomech
Feb 13, 2018 12:48 pm
Forum: Battery Technology
Topic: cell imbalance in new hobby king lipo pack
Replies: 8
Views: 265

Re: cell imbalance in new hobby king lipo pack

Yeah, you worry too much.
Do what Dman said and if the brick puffs-up, take a pic and send it to HK.
the Multistars have a high turn-over rate and I suspect that one cell will fall in to line and everything will be ok.
by motomech
Feb 13, 2018 12:17 pm
Forum: E-Bike Technical
Topic: BMSBattery Torque sensor
Replies: 30
Views: 2210

Re: BMSBattery Torque sensor

I look forward to discussing this further with you, and then sharing any pertinent results on this (or other) thread(s). I agree, so lets keep the discussion here. For those looking for the best(most realistic) PAS experience w/out breaking the bank, should try out one of the newer sine-wave contro...
by motomech
Feb 12, 2018 11:03 pm
Forum: E-Bike Technical
Topic: Hobbyking 6S BMS
Replies: 21
Views: 617

Re: Hobbyking 6S BMS

I use a two-stage charge process. After the ride, at some point I will take them up to storage charge- 3.90V-3.95V /cell. Then check 'em. As I start to think about out going out, I will start the top charge while I ck. the tires and air shock. After 10 or 15 minutes, I'm usually between 4.00V and 4....
by motomech
Feb 12, 2018 12:46 pm
Forum: E-Bike General Discussion
Topic: Critique my Build/Plan
Replies: 23
Views: 479

Re: Critique my Build/Plan

Jon NCal wrote:
Feb 12, 2018 1:11 am
6S+6S+4S=16S
oops, I meant 6S + 4S + 4S :oops:
by motomech
Feb 11, 2018 10:18 pm
Forum: Battery Technology
Topic: lipo battery pack wiring with pics
Replies: 10
Views: 5964

Re: lipo battery pack wiring with pics

Are you talking about LiPoly "bricks or Li-Ion cells?
by motomech
Feb 11, 2018 10:13 pm
Forum: E-Bike General Discussion
Topic: Critique my Build/Plan
Replies: 23
Views: 479

Re: Critique my Build/Plan

I have no experience w/ mid-drives and although your desired speeds seem high for a hard-tail, I won't comment on your proposed build per se. But, I do have some experience w/ LiPoly and would strongly recommend that consider bulk charging. One of my bikes uses Multistar 6S + 6S + 4S for 14S and I b...
by motomech
Feb 10, 2018 8:00 pm
Forum: Items Wanted
Topic: WTB- Cute Q100H Motor(s)
Replies: 2
Views: 191

Re: WTB- Cute Q100H Motor(s)

I have a rear 328CST bare motor I'm not using. $50 plus shipping.
https://endless-sphere.com/forums/viewt ... h#p1240933
by motomech
Feb 10, 2018 7:25 pm
Forum: E-Bike Technical
Topic: BMSBattery Torque sensor
Replies: 30
Views: 2210

Re: BMSBattery Torque sensor

Wheezy, I PM'ed you.
I have an extra KT sine wave controller w/ a SLCD-3 display you could try out. If you are looking for the best budget PAS experience, it has 5-level "torque imitation" PAS.
As w/ most of these "off the shelf" ebikes, it could be a little tricky to intergrate.
by motomech
Feb 10, 2018 12:21 am
Forum: E-Bike Technical
Topic: MAC motor controller?
Replies: 21
Views: 737

Re: MAC motor controller?

Thanks for the response, very informative. And now Chalo knows exactly what he has.
by motomech
Feb 10, 2018 12:16 am
Forum: E-Bike Technical
Topic: Cute Q100H Autopsy & Modify 2017
Replies: 46
Views: 1274

Re: Cute Q100H Autopsy & Modify 2017

Actually, I mis-labeled the screws we are talking about. They are dished, so they would be dished Allens, no head to speak of. So there is nothing to grab on to if the wrench fails. Either Allens or Phillips, the last resort is cut a slot with a Dremel tool and use the straight bit w/ the impact. A ...
by motomech
Feb 09, 2018 10:14 pm
Forum: E-Bike Technical
Topic: Cute Q100H Autopsy & Modify 2017
Replies: 46
Views: 1274

Re: Cute Q100H Autopsy & Modify 2017

I replaced the screws in one of my motors w/ Allen head screws and it was a mistake. The Allen wrench is so small that it wants to bend before applying any real torque. I best way to get the screws out is to use a hand-held impact driver w/ a good bit and replace any of the Phillips screws that star...