Search found 206 matches

by kcuf
Jan 23 2021 11:23am
Forum: E-Bike Technical
Topic: BMS Bypass OK?
Replies: 13
Views: 217

Re: BMS Bypass OK?

no b22
by kcuf
Jan 21 2021 1:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: reliable middrive for commute?
Replies: 20
Views: 540

Re: reliable middrive for commute?

more limited choices bbs 02 vs hd

smallest front ring better 44t if option


cassette cogs may be readily changeable

freewheel cluster cogs not so easy


most riders will never

need more than

3-5 gear options
by kcuf
Jan 20 2021 8:06pm
Forum: E-Bike Technical
Topic: BMS Bypass OK?
Replies: 13
Views: 217

Re: BMS Bypass OK?

that damn bms feature

causes many unhappy users


for my herd

often bypass bms power load path

no switch though

load power straight from tabs

only charge power through bms

much smaller/cheaper bms charge only


outdoor discharge

using conservative controller lvc

often safe enough
by kcuf
Jan 20 2021 7:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: reliable middrive for commute?
Replies: 20
Views: 540

Re: reliable middrive for commute?

personally use cheap $10-$12 chains

between 1-2k miles before seeing measurable wear


avoid small rear cogs

especially 11t


use a chain wear gauge/tool regularly

swap for a new chain any measured wear

doing so greatly reduces cog wear
by kcuf
Jan 04 2021 10:08pm
Forum: E-Bike Technical
Topic: Battery won't charge
Replies: 14
Views: 242

Re: Battery won't charge

many bms die easily

high power gets expensive

consider low power charge bms only

discharge directly off tabs



outdoor battery discharge

no bms usually safe enuf

controller lvc should match 14s



cheap ebay solution

10-20A 14s bms wired charge only
by kcuf
Jan 02 2021 2:35pm
Forum: E-Bike Technical
Topic: Battery won't charge
Replies: 14
Views: 242

Re: Battery won't charge

what is the voltage of the charger

label isn't marked

use volt meter and measure

charger output not connected to battery

if 54v and change?

wrong charger

if 58v and change

something else wrong
by kcuf
Dec 16 2020 8:11pm
Forum: E-Bike Technical
Topic: Trio Cargo e-bike mid drive
Replies: 16
Views: 545

Re: Trio Cargo e-bike mid drive

use different bike

and bbshd
by kcuf
Dec 16 2020 8:08pm
Forum: Forum Rules and Features
Topic: How do you feel about 'other toxic discussions' on this forum?
Replies: 39
Views: 1092

Re: How do you feel about 'other toxic discussions' on this forum?

otd great for trolls

instabilities made visible

divisions sowed

no point on technical forum
by kcuf
Nov 15 2020 5:27pm
Forum: E-Bike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1442

Re: Your thoughts on frames and riding positions?

tried everything went fat tire years ago 10-13psi soak up harsh pavement nothing complicated or too costly good shocks/forks expensive and sucks mounting battery limited tire tread choices tho vee rubber makes rib tread for felt low pressure fat tires handle all terrain stepper seat post offers both...
by kcuf
Nov 15 2020 5:02pm
Forum: Items for Sale - Used
Topic: Indian homage ebike sold on Craigslist
Replies: 13
Views: 698

Re: Indian homage ebike PRICE DROP

need to get in sight of bikers

especially rubs

mostly poor diy folks here
by kcuf
Nov 14 2020 9:31am
Forum: E-Bike Reviews & Testing
Topic: What the heck is wrong with UPP packs!?
Replies: 20
Views: 1002

Re: What the heck is wrong with UPP packs!?

motor wattage continuous

not peak rating


never seen 30a bms peak 90a

more like 40-50a if that


multiple problems here

overloading is bad as evidenced here

water only makes things worse
by kcuf
Nov 03 2020 1:03pm
Forum: Items for Sale - Used
Topic: Indian homage ebike sold on Craigslist
Replies: 13
Views: 698

Re: Indian homage ebike

great work excellent concept
by kcuf
Nov 02 2020 7:53pm
Forum: E-Bike Technical
Topic: Help with unknown ebike controler repair
Replies: 9
Views: 492

Re: Help with unknown ebike controler repair

pictures will be your friend
by kcuf
Nov 01 2020 2:09pm
Forum: E-Bike General Discussion
Topic: 52 volt batteries proceed with caution
Replies: 27
Views: 1429

Re: 52 volt batteries proceed with caution

emp raises valid point

48v packs poorly modified to 52v


human nature likes snappy 52v

warrantied bbsxx installs only use 48v


bbsxx internal gearing skewers @ higher motor rpm

use shorter cranks to compensate
by kcuf
Oct 16 2020 10:24am
Forum: E-Bike General Discussion
Topic: How do I size the proper mid-drive for off road use?
Replies: 21
Views: 772

Re: How do I size the proper mid-drive for off road use?

carry chain breaker and spare links + master

if when derailleur craps

or chain breaks

can usually rework chain

for limp mode


chain lube over rated

measure chain wear

replace $10-$15 chain showing minor wear
by kcuf
Oct 16 2020 10:21am
Forum: E-Bike General Discussion
Topic: Off Road Battery Case what do you use?
Replies: 7
Views: 290

Re: Off Road Battery Case what do you use?

using secured padding

triangle bag is great choice
by kcuf
Oct 15 2020 7:09pm
Forum: E-Bike General Discussion
Topic: How do I size the proper mid-drive for off road use?
Replies: 21
Views: 772

Re: How do I size the proper mid-drive for off road use?

bbshd = bbs03

somewhat more rugged

hd about 3lbs heavier than 02

hd motor seemingly less efficient windings


hd likely hold up better off roading


can be found in wider BB spacing too

fat tire bikes hmm
by kcuf
Oct 15 2020 6:59pm
Forum: E-Bike General Discussion
Topic: Off Road Battery Case what do you use?
Replies: 7
Views: 290

Re: Off Road Battery Case what do you use?

shark can work well off road adding luggage straps

lash-tighten securely to frame

bottle mount bolts used for locating only


battery secured properly inside

triangle bag can be good


backpack tether useful configuration too

altho places battery weight higher

and might suck crashing
by kcuf
Sep 29 2020 5:01pm
Forum: E-Vehicles General Discussion
Topic: ES member "Farfle", RIP at 27
Replies: 8
Views: 1491

Re: ES member "Farfle", RIP at 27

had pleasure of meeting Jackson

brilliant mind and humble heart

will be greatly missed
by kcuf
Sep 12 2020 2:21pm
Forum: E-Bike Technical
Topic: My new 48v 30AH Chamrider Battery is shutting off at 50v
Replies: 28
Views: 754

Re: My new 48v 30AH Chamrider Battery is shutting off at 50v

"4. What shouldn't I touch? I don't want to get shocked by 40amps"

no offense

need book learning

basic electricity
by kcuf
Sep 11 2020 4:18pm
Forum: E-Bike Technical
Topic: My new 48v 30AH Chamrider Battery is shutting off at 50v
Replies: 28
Views: 754

Re: My new 48v 30AH Chamrider Battery is shutting off at 50v

not sure how display acquires batt % normal 48v system lvc occurs 42-44v bms balance bleed off function perhaps following bms equilibrium function some chargers won’t resume bulk charging badly out of balance packs can take several days achieve equilibrium leave charger plugged in for several days n...
by kcuf
Sep 07 2020 11:12am
Forum: Battery Technology
Topic: Anderson plug irritation
Replies: 6
Views: 354

Re: Anderson plug irritation

step 1

check for straight tangs

even slight bend downward

this insures solid click over retainer

step 2

avoid current overload

step 3

see step 1
by kcuf
Aug 18 2020 5:29pm
Forum: E-Bike General Discussion
Topic: bbs02 - what size chainring for my commuter?
Replies: 54
Views: 2442

Re: bbs02 - what size chainring for my commuter?

smaller chainring always better bbsxx until chain line becomes too severe 42t and up chainrings usually clear housing moves chain more inward and helps reach bigger rear cogs 20-25mph is comfy zone for bbsxx my front 42t rear 36t bbshd climbs until loses traction also use short crank arms nice when ...
by kcuf
Aug 18 2020 5:11pm
Forum: E-Bike Technical
Topic: BBS01B not working - help
Replies: 8
Views: 244

Re: BBS01B not working - help

internet search

"dump bafang display"

all bbsxx users

should carry simple jumper

know how to use it