Search found 130 matches

by kcuf
Jul 13 2019 8:37am
Forum: Battery Technology
Topic: voltage drop under load (maybe a simple question?)
Replies: 24
Views: 379

Re: voltage drop under load (maybe a simple question?)

54.6v is 48v 13s top charge

if measurements correct

pack is not fully charging
by kcuf
Jul 11 2019 8:59am
Forum: Motor Technology
Topic: Measure RPM with video camera
Replies: 6
Views: 151

Re: Measure RPM with video camera

many phone apps

strobe measurement
by kcuf
Jul 11 2019 8:56am
Forum: E-Bike Non-hub Motor Drives
Topic: Should a 8S cassete be a good option for e-bikes?
Replies: 15
Views: 359

Re: Should a 8S cassete be a good option for e-bikes?

chain wear gauge

used regularly

any sign wear

replace chain

cogs last much longer




replacement interval

cheap 6-8 speed stuff

about 1000 mile

2 months my commute
by kcuf
Jul 10 2019 9:23pm
Forum: Items for Sale - New
Topic: Electric Fat Bike from SEKIBIKES.COM
Replies: 8
Views: 538

Re: Electric Fat Bike from SEKIBIKES.COM

forum rules

require price

for sale items
by kcuf
Jun 29 2019 6:59pm
Forum: Motor Technology
Topic: Bafang BBS01 Error 30 -> Controller broken?
Replies: 3
Views: 155

Re: Bafang BBS01 Error 30 -> Controller broken?

on good day

bbs02 barely tolerates

750w continuous

more like 600-700w

especially hot days


many programmings

full throttle or high PAS

exceed 1000w


major difference between

peak and continuous wattage



limiting average power prevents

damage to controller
by kcuf
Jun 28 2019 5:19pm
Forum: General Discussion
Topic: Bike shops..
Replies: 16
Views: 396

Re: Bike shops..

unsupportive shops exist

thankfully fewer every year

their loss ebikes gain
by kcuf
Jun 28 2019 5:16pm
Forum: E-Bike General Discussion
Topic: How to convert anderson plugs to Higo plugs?
Replies: 10
Views: 405

Re: How to convert anderson plugs to Higo plugs?

crimp strands with insulation If you crimp with insulation inside the crimp, it doesn't compress all the metal to make it a single piece (cold weld). So the contact may not be as good, and can allow moisture into the crimp (whcih can corrode it over time), and the wire can also pull back out of the...
by kcuf
Jun 26 2019 9:22pm
Forum: E-Bike General Discussion
Topic: How to convert anderson plugs to Higo plugs?
Replies: 10
Views: 405

Re: How to convert anderson plugs to Higo plugs?

crimping app

to small ga wire

strip amount insulation

fold strands covering insulation

crimp strands with insulation

nice strain relief
by kcuf
Jun 26 2019 9:17pm
Forum: E-Bike General Discussion
Topic: Cant decide on 36v or 48v mid drive motor
Replies: 10
Views: 410

Re: Cant decide on 36v or 48v mid drive motor

bbsxx originally 24-36v

do not believe bafang

modified internal gearing

for 48v


if you actually pedal

48v may seem too fast

using full voltage rpm

for any meaningful leg input


something to consider

but 52 is my choice
by kcuf
Jun 21 2019 1:35pm
Forum: E-Bike Technical
Topic: Help Please on 10s bms install on 10s2p pack
Replies: 12
Views: 267

Re: Help Please on 10s bms install on 10s2p pack

p means parallel

tops and bottoms connected

essentially becomes larger single cell
by kcuf
Jun 18 2019 12:05pm
Forum: E-Bike General Discussion
Topic: New York to legalize ebikes?
Replies: 11
Views: 430

Re: New York to legalize ebikes?

have been thrust into deliveries

large fleet running around manhattan

lwb cargo bikes

bbshd

some pulling trailers too


perhaps illegal

but cops like ebikes

more than cars trucks


politicians wanna figure out

how to get paid


always vote out incumbents

and elected judges
by kcuf
Jun 06 2019 3:17pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Best Starter Frame for Bafand BBSHD
Replies: 10
Views: 449

Re: Best Starter Frame for Bafand BBSHD

not only cost complexity

9th ave around 50’s

fat tires definitely soften

so called bike lane
by kcuf
Jun 06 2019 10:48am
Forum: E-Bike General Discussion
Topic: EM3ev, setting the record straight on a few things
Replies: 89
Views: 12014

Re: EM3ev, setting the record straight on a few things

hard to suggest vendor

no idea what continent
by kcuf
Jun 06 2019 10:44am
Forum: E-Bike Build Threads / Photos & Video
Topic: Best Starter Frame for Bafand BBSHD
Replies: 10
Views: 449

Re: Best Starter Frame for Bafand BBSHD

fat tire bbshd

excellent combo

nyc roads rough

all terrain nice air ride

compared quality full suspension

less cost and complexity
by kcuf
May 29 2019 12:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD with no SPEED sensor?
Replies: 5
Views: 298

Re: BBSHD with no SPEED sensor?

commercial cargo bikes

running around nyc

bbshd

haul large battery too

excellent combination
by kcuf
May 15 2019 5:40am
Forum: Battery Technology
Topic: Silent and compact charger for 14S battery / 10-15A
Replies: 10
Views: 443

Re: Silent and compact charger for 14S battery / 10-15A

they can parallel fine

frequently do similar


minor nit picking

any open connection

may reduce charge current
by kcuf
May 07 2019 8:21am
Forum: E-Bike Technical
Topic: Bafang BBSHD Over Voltage Protection issue on 52v
Replies: 24
Views: 944

Re: Bafang BBSHD Over Voltage Protection issue on 52v

someone consider offering

bbsxx controller rebuild service


gotta be many 02 03 cores

dead in the wild


bafang plays

controller games
by kcuf
May 06 2019 3:12pm
Forum: E-Bike Technical
Topic: Hall sensor died today
Replies: 3
Views: 163

Re: Hall sensor died today

phase wiring shorted

from controller

possibly blown fet
by kcuf
May 03 2019 2:48pm
Forum: E-Bike General Discussion
Topic: Battery Consumption
Replies: 24
Views: 974

Re: Battery Consumption

22 miles on 840wh if thats what actually have seems about right to me obviously last portion lower voltage if capacity further degrades perhaps attempt balancing leave on charger several days disconnect and reconnect several times post final resting pack voltage amazon 28ah pack comes with bms life ...
by kcuf
May 03 2019 2:39pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBS02B 750w mysterious problem
Replies: 11
Views: 343

Re: BBS02B 750w mysterious problem

if jumping correctly

no pas or throttle action

inclined towards duff controller

or perhaps internal wiring

check moisture ingress
by kcuf
May 01 2019 4:38pm
Forum: E-Bike General Discussion
Topic: First E-Bike - Doing DIY BBSHD - Critique my plan
Replies: 162
Views: 3996

Re: First E-Bike - Doing DIY BBSHD - Critique my plan

3 dollar chain wear gauge replace 10 15 dollar chain any measurable wear sprockets will last very long time my chain interval about 1000 miles large hubs using bicycle rims will not lace strong durable wheels even best spokes and lace job eventually fail heavy commuter experience something gotta giv...
by kcuf
May 01 2019 12:52pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBS02B 750w mysterious problem
Replies: 11
Views: 343

Re: BBS02B 750w mysterious problem

recheck all connections


correctly bypass display

jumpstart motor controller

works under throttle

or top pas level

may help

rule in out display


test health of battery pack

not only voltage

current under load
by kcuf
May 01 2019 12:42pm
Forum: E-Bike General Discussion
Topic: First E-Bike - Doing DIY BBSHD - Critique my plan
Replies: 162
Views: 3996

Re: First E-Bike - Doing DIY BBSHD - Critique my plan

10000 miles cute

nothing wrong learning from others

however doing final proof



bbshd do not shred hardtails in six months

utter nonsense

apparently offered by think not facts



good luck op
by kcuf
May 01 2019 9:06am
Forum: E-Bike General Discussion
Topic: First E-Bike - Doing DIY BBSHD - Critique my plan
Replies: 162
Views: 3996

Re: First E-Bike - Doing DIY BBSHD - Critique my plan

some only think

others actually do

the later know