Search found 1237 matches

by brumbrum
Dec 12 2018 3:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2742
Views: 159956

Re: Sur-Ron - New Mid drive Bike

Chainsaw oil :wink:
by brumbrum
Dec 08 2018 3:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2742
Views: 159956

Re: Sur-Ron - New Mid drive Bike

Qulbix Q76R looks much better than Sur-Ron :D :D Looks like it costs nearly twice as much as a Sur-Ron (177%), has a smaller capacity battery, and a hub motor. Not to mention the Sur-Ron's forged frame looks infinitely more professional. I doubt that. It was self built. Quilbix frames are excellent...
by brumbrum
Dec 08 2018 12:25pm
Forum: Battery Technology
Topic: Tested my Panasonic cells (Opus), unsure of results
Replies: 6
Views: 132

Re: Tested my Panasonic cells (Opus), unsure of results

The cells need to be warm to get the best out of them. I am pretty sure that internal resistance will be a lot higher in cold temp. I found that my samsung 30Q cells give much less capacity when cold.

Also if the cells are new, i would cycle rhem a few rimes before testing
by brumbrum
Dec 05 2018 2:45am
Forum: E-Bike General Discussion
Topic: Qulbix Q140MD - any experience?
Replies: 64
Views: 1677

Re: Qulbix Q140MD - any experience?

You have chosen well. Great bike. Solid parts. Excellent set-up. 8)
by brumbrum
Nov 29 2018 3:51pm
Forum: E-Bike General Discussion
Topic: Qulbix Q140MD - any experience?
Replies: 64
Views: 1677

Re: Qulbix Q140MD - any experience?

Glad to hear the Q76 frame has held up well! I looked at the Vortex too, but it just looks too much like a motocross bike to be able to ride it without any hassle here I think. Performance should be similar though, and I'm hoping the Q140MD will feel natural to pedal on rather than relying 100% on ...
by brumbrum
Nov 25 2018 3:58pm
Forum: E-Bike General Discussion
Topic: Battery Fire.
Replies: 39
Views: 1372

Re: Battery Fire.

Its very weird why the video footage is edited at 3.14. You see a charging cable at 3.13 and then there's a little blip and it's gone. Why would they want to edit out the fact it was charging?
by brumbrum
Nov 23 2018 11:35am
Forum: Motor Technology
Topic: wich choice motor qs273
Replies: 5
Views: 244

Re: wich choice motor qs273

The lower the turn count the higher the rpm. The motor will spin more times per volt
by brumbrum
Nov 14 2018 2:25am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 276
Views: 21342

Re: Nucular electronics - complete kit for ev! [beta]

Give the guy a chance, Haah! The solder has barely had time to cool on the very first board. Ha! TAKE MY MONEY NOW!!! OK...no not really...this controller needs some vetting yet. But I am quite interested!!! My hope is it can do 150 volts. I'm willing to sacrifice some of those crazy 500 phase amps...
by brumbrum
Nov 13 2018 4:16pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 276
Views: 21342

Re: Nucular electronics - complete kit for ev! [beta]

Give the guy a chance, Haah! The solder has barely had time to cool on the very first board.

Some lovely torque. How much sag you getting on your pack. Just wondering what it takes to get to 60kph
by brumbrum
Nov 12 2018 12:59pm
Forum: Battery Technology
Topic: Best battery Deals on 11 11 Chinese sale!?
Replies: 9
Views: 627

Re: Best battery Deals on 11 11 Chinese sale!?

no one? .... considering people always looking for cheap batteries and deals on here i thought there would be a little more action... these don't look bad https://www.aliexpress.com/item/100-Original-LiitoKala-Lii-35A-3-7V-3500mAh-NCR18650GA-10A-Discharging-Rechargeable-Batteries-For-Sanyo/32823361...
by brumbrum
Nov 05 2018 2:42am
Forum: Battery Technology
Topic: Samsung 25R Internal Resistance
Replies: 19
Views: 596

Re: Samsung 25R Internal Resistance

I have few new cells from nkon here. Some after few cycles. Samsug 25R shows 11,5 miliohms AC and 18 miliohms DC at 4,08 V. Sanyo GA shows 20,4 (24 new) miliohms AC and 35 miliohms DC at 4,08 V. Temperature during measurement cca 25 C Sanyo GA cells in my one year old battery 10s5p are about 38 mil...
by brumbrum
Nov 02 2018 4:52am
Forum: Battery Technology
Topic: Samsung 25R Internal Resistance
Replies: 19
Views: 596

Re: Samsung 25R Internal Resistance

If I remember correctly, it takes a few cycles for a brand new cell to achieve it's best IR (and capacity), so that might be why you could see a used cell with lower IR than a new cell. Have to agree. I was first dissapointed when building a 20s 27ah samsung 30Q pack. First 3 cycles gave higher sag...
by brumbrum
Oct 28 2018 2:11am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 170213

Re: LMX P2 : Freeride trials motorcycle frame development

#219 chain should be plenty strong enough :thumb:
by brumbrum
Oct 26 2018 1:32am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 170213

Re: LMX P2 : Freeride trials motorcycle frame development

Adam has ordered in some 14t sprockets for the lmx motor. I will be trying this soon with a 100t rear sprocket from eBay. This will give a slightly lower gearing ratio of approx 7.2:1 instead of the original 7.8:1 With the idea of reducing some noise from the original 12t front sprocket. The lmx161...
by brumbrum
Oct 25 2018 1:20pm
Forum: E-Bike General Discussion
Topic: Help magnets in hub motor
Replies: 21
Views: 631

Re: Help magnets in hub motor

Hi all, while I was replacing the hall effect sensors I damaged few magnets inside the stator. couldn't find an alternative! I believe they about 2.2 mm thick * 13.9mm wide *28mm long. Got N50 30mm x 10mm x 2mm from aliexpress that didn't work it's very weak compared with original one. any suggesti...
by brumbrum
Oct 25 2018 1:17pm
Forum: E-Bike General Discussion
Topic: Help magnets in hub motor
Replies: 21
Views: 631

Re: Help magnets in hub motor

Chalo wrote:
Oct 25 2018 11:54am
Are you sure your replacement magnets have their fields aligned the same as your old magnets?
This is possible but unlikely as they tend to repel each other when Sliding into place.
by brumbrum
Oct 25 2018 1:16pm
Forum: E-Bike General Discussion
Topic: Help magnets in hub motor
Replies: 21
Views: 631

Re: Help magnets in hub motor

Jonno wrote:
Oct 25 2018 12:27pm
Hi Doit,
I have some spare magnets (out of an scrap hub)
size approx 27 x 13.9 x 2.8mm
Have a re measure and I'll send you some if it helps.

Jonno

Just make sure they're in a large enough box not to get magnetized to the inside of a post office truck :wink:
by brumbrum
Oct 25 2018 8:48am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 170213

Re: LMX P2 : Freeride trials motorcycle frame development

Adam has ordered in some 14t sprockets for the lmx motor. I will be trying this soon with a 100t rear sprocket from eBay. This will give a slightly lower gearing ratio of approx 7.2:1 instead of the original 7.8:1 With the idea of reducing some noise from the original 12t front sprocket. The lmx161 ...
by brumbrum
Oct 20 2018 10:09am
Forum: Motor Technology
Topic: Custom made #219 pitch sprockets?
Replies: 9
Views: 379

Re: Custom made #219 pitch sprockets?

DanGT86 wrote:
Oct 20 2018 9:53am
I have no international shipping experience whatsoever. How much do you think it would cost to have one sent from the middle of the US to you?
I'm in zip code 63116
Not much, If sent by normal airmail in a padded jiffy envelope. Probably only 10 or 15usd
by brumbrum
Oct 20 2018 9:31am
Forum: Motor Technology
Topic: Custom made #219 pitch sprockets?
Replies: 9
Views: 379

Re: Custom made #219 pitch sprockets?

https://www.accelerationkarting.com/kartmasterprdenginesprocket.html These come with a 14mm adapter but are made with a threaded locknut type mount. However, that leads me to believe there is a common kart shaft in 14mm that other companies might make things for. If space permits it on the motor, y...
by brumbrum
Oct 20 2018 1:51am
Forum: Motor Technology
Topic: Custom made #219 pitch sprockets?
Replies: 9
Views: 379

Re: Custom made #219 pitch sprockets?

http://www.rocketsprocket.net/rocket2018_007.htm This is a US company so shipping might be painful but they do sell up to 105 teeth. They will also do custom for $1 per tooth I think. They also offer mini sprockets in uncommon low sizes like 50tooth. If you buy from them MAKE SURE YOU EMAIL AND ASK...
by brumbrum
Oct 20 2018 1:23am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2742
Views: 159956

Re: Sur-Ron - New Mid drive Bike

Since i have electric bikes i dont apreciate the way i did the gas motor sound...e fell more relaxed and connected to nature without noise...its shame that in portugal nobody is selling surron. That's funny. Coming from a direct drive E-bike with a sine wave controller, the Sur Ron seems loud to me...
by brumbrum
Oct 18 2018 1:36am
Forum: Items for Sale - Used
Topic: Kelly KLS7212S (Opened but unused)
Replies: 3
Views: 373

Re: Kelly KLS7212S (Opened but unused)

Never been used?
by brumbrum
Oct 17 2018 9:00am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 990
Views: 170213

Re: LMX P2 : Freeride trials motorcycle frame development

Or maaan! I want some stickers on mine.
by brumbrum
Oct 17 2018 1:48am
Forum: E-Bike Technical
Topic: Adaptto max e problem
Replies: 4
Views: 202

Re: Adaptto max e problem

I have pm'd you to try and help out a little.