Endless Sphere

I tried climbing a 16% hill today, and the bike wouldn't do it without pedaling. With pedaling I was able to manage a fairly comfortable 8-10mph.

So maybe it is a 350W motor?

I'll try and find a suitable hill to test it on sometime this week. Like you I am pretty much out of ideas as everything seems to check out. The only other thing I can think of is to build the 500W BPM I have in to a wheel and see how that goes - I take it the BPM & CST should have similar performan...

I've already tried running sensorless - the performance is the same. The motor has 500W written on it, so I would hope it actually is! Could it be that I am just too heavy for it (18.5 st). One other thing I've noticed is that the phase wires seem very small. The bullet connectors feel warm to the t...

I tried a different throttle which has made no difference. I measured the voltages on the throttle connector - red is 4.4V, white is 0.8V with the throttle closed, 3.65V with it open. Oddly enough, when I bridge the red & white wires as suggested, the motor does not run. When I did this I was bridgi...

No the 23-30A was before shorting the green/black wires. I had assumed the the 500W referred to the maximum continuous wattage, but I suspect it varies a lot between manufacturers. I'm reasonably happy with the top speed on the flat as I was wanting a bike rather than moped, but the speed does drop ...

That was it then - the controller was set to mid speed. All sorted then. From the codes on your motor (1307 = code 13) that means you have a slow(ish) wind motor and 19/20mph is bang on for that motor @ 36v in a 26" wheel. If you want to go faster, you'll need a higher voltage battery.. I guess so,...

OK, I've tried swapping the controller for the spare one - no difference. I borrowed a clamp on current meter from work and the peak current drawn is typically around 23A though I did see it go as high as 30A briefly. When up to speed on the level (16 mph) the current draw is about 8A - 10A. After s...

Yes, normal for that power system. Merganser, Is there a Bafang code on your CST? The KU123 will happily take 35A with a shunting and shove it at 63V into the BPM to handle 2200Watts - that's well over 120Nm at the rear axle. :evil: I'd plug in a 3 speed switch and make sure you aren't in slow mode...

Yes, that is the motor & controller I have though the main picture is wrong (shows smaller motor).

The motor is larger than a geared hub, its about 18cm in diameter, see here:

http://www.szbaf.com/product.asp?id=2

samd - I will post the information printed on the motor this evening. I looked for a code previously and could not find anything like code 10 or 11 (the BPM I have has an 11 marked). IIRC it is marked with 27, but I'm not sure whether that is a motor code or something else. d8veh - I am currently ru...

OK, thanks for the responses - sounds like the performance is fairly normal. According to the specs, the battery & BMS should be good for 2C (30A). I'll see if I can borrow a clamp on current meter to try and find out how much current it draws. This thread http://endless-sphere.com/forums/viewtopic....

I've just finished building my first ebike, and have now done a few miles on it. I'm a bit disappointed with the performance, so would like to canvass opinion on whether this level of performance is normal, or whether their may be something wrong with the setup. The specs are: Bafang CST 500W 36V mo...

OK, I can buy that it maybe a genuine OEM motor but I ordered a BPM not a BPM2. It also appears to be a code 11 (280rpm) motor rather than the 201rpm I ordered, still I don't mind the additional speed. I really only ordered the BPM as a backup incase the CST doesn't workout but the damage won't help...

What do you mean by 6 week PayPal deadline?

I paid by credit card rather than using my PayPal account, though PP were processing the payment - I assume that in the event of a serious problem I could initiate a charge back as with any other credit card purchase.

I ordered a 201 RPM motor, the BPM I got is marked as a code 11 so I think I got what I ordered (sort of). I still reckon its a cheap clone - if it were a Bafang, I'm sure they would brand it accordingly. Also, just from looking at the CST motor which looks genuine, it appears to be a better made it...

My order from BMS Battery arrived today so I'd like to share my experience of their customer service. After reading the somewhat mixed reports of their customer service, I was wary of ordering from them but I couldn't find another vendor selling the 500W version of the Bafang CST motor, so I had lit...

My 500W CST has just arrived and a quick & not very accurate measurement of the OLN dimension shows it is less than 135mm without the torque washers fitted, I'd say it will probably be 135 - 136mm with them fitted. It certainly isn't 150mm though.

Why are sensorless controllers quieter?

Is it possible the earlier ones were wider?

Anyway, I hope you are right and it does drop right in.

I'm very glad I saw this thread before I ordered my 500W CST from BMS Battery - it wouldn't have occured to me that it might not fit 135mm dropouts. In the end I decided to risk it but I have also ordered a 500W BPM as well as a backup in case the CST won't fit my frame. I'll report back with the di...

Thanks - 500W it is.

I think I'll probably stick with the higher RPM motor because I'd prefer to use a cassette than a freewheel and I haven't seen anywhere selling lower speed CST's. If 48V will help with the hills, I could do that.

Hello all, This is my first post and am looking for some advice before I dip my toe in to the world of electric bikes. A couple of weeks ago I was all set to order a 250W conversion kit & battery off ebay, but after reading the posts here and elsewhere I suspect that a standard 250W euro compliant k...