Search found 123 matches

by joe81
Jun 17, 2017 2:08 am
Forum: E-Bike Technical
Topic: Coast -> throttle apply -> dead. KT72SVPRK + KT-LCD3
Replies: 7
Views: 253

Re: Coast -> throttle apply -> dead. KT72SVPRK + KT-LCD3

it only happens sporadically when in the transition from coast. so it's still spinnng forward but i think it's braking a bit.

battery seems okay. the next seonds i can accellerate strongly (stronger than the request when the issue happened).
by joe81
Jun 17, 2017 12:49 am
Forum: E-Bike Technical
Topic: Coast -> throttle apply -> dead. KT72SVPRK + KT-LCD3
Replies: 7
Views: 253

Re: Coast -> throttle apply -> dead. KT72SVPRK + KT-LCD3

good info!
next time i will try what happens when i disconnect the display.
battey voltage (SOC) is good. it only happens when i apply the throttle bit. the motor delivers negative torque then.
maybe some setting is so off that i pull down battery voltage below what the display can handle. :shock:
by joe81
Jun 16, 2017 8:32 am
Forum: E-Bike Technical
Topic: Coast -> throttle apply -> dead. KT72SVPRK + KT-LCD3
Replies: 7
Views: 253

Coast -> throttle apply -> dead. KT72SVPRK + KT-LCD3

Hey there, I have a strange phenomenon with my Kunteng sine wave controller KT72SVPRKD-LCD + KT-LCD3 running on 72V and would be interested to hear your opinions. Very sporadically when I reapply throttle from coast condition there is no power and the display goes blank. It feels like a short or the...
by joe81
Jun 09, 2017 7:03 pm
Forum: E-Bike General Discussion
Topic: Solar camping trailer to recharge ebike while overlanding
Replies: 87
Views: 4421

Re: Solar camping trailer to recharge ebike while overlandin

i think this one is not ideal for solar, because of the way it folds over. so alot of the time the panel would stand upright.
by joe81
May 25, 2017 3:00 am
Forum: E-Bike Technical
Topic: ENDUROEBIKE.COM
Replies: 219
Views: 18728

Re: ENDUROEBIKE.COM

Another great vid Andy. If you're gonna be riding off-road you definitely need to get some knobbies on there. My bike is coming with the Evelbike Grizzly on the front which I believe to be the Duro Wildlife Leopard (I'm getting the 24" front wheel) and I'll be installing the Duro DM1155 (19") on th...
by joe81
May 24, 2017 9:53 am
Forum: E-Bike Photos & Video
Topic: 72 vott e-bike
Replies: 40
Views: 4537

Re: 72 vott e-bike

nice. doesn't look so much bigger!
by joe81
May 20, 2017 12:17 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Chinese Ebay Build
Replies: 131
Views: 8818

Re: My Chinese Ebay Build

slightly wider rear would actually be beneficial for cornering characteristics.
smaller diameter like 17" or 18" could make sense though if you don't need the clearance.
by joe81
May 18, 2017 2:20 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Chinese Ebay Build
Replies: 131
Views: 8818

Re: My Chinese Ebay Build

I'd guess the charger cuts back on the current at around 90%
by joe81
May 16, 2017 9:03 pm
Forum: E-Bike General Discussion
Topic: Enduro ebike swing arm dropout problem
Replies: 21
Views: 944

Re: Enduro ebike swing arm dropout problem

wow. that sounds like some major modifications! :twisted:
by joe81
May 16, 2017 10:39 am
Forum: E-Bike General Discussion
Topic: Enduro ebike swing arm dropout problem
Replies: 21
Views: 944

Re: Enduro ebike swing arm dropout problem

what was wrong and where did you source the frame?
here in china it's a rule that the front and rear wheel of everything cheap with two wheels must be comically misaligned.. :lol:
by joe81
May 15, 2017 7:08 pm
Forum: E-Bike General Discussion
Topic: Enduro ebike swing arm dropout problem
Replies: 21
Views: 944

Re: Enduro ebike swing arm dropout problem

no I didn't have this problem you should ask for new ones ( did have other problems ) like the drop out is not centred but it is made for a 48v motor 7 speed cassette/free wheel if you find a company with a keyway machine they can sort that out I did this with my frame as I have a motor with 12mm a...
by joe81
May 08, 2017 12:33 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Chinese Ebay Build
Replies: 131
Views: 8818

Re: My Chinese Ebay Build

thank you.
that sounds like a special width. so it's similar to the leili frame in that respect. probably the room is necessary between the cranks to accommodate the wide frame and the batteries inside of it.
..no use for all the cranks that i have sitting around.. :roll:
by joe81
May 07, 2017 9:48 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Chinese Ebay Build
Replies: 131
Views: 8818

Re: My Chinese Ebay Build

looks very nice!
does this frame have a standard bottom bracket width (like 68mm?)?
i had too many bad experiences with the taper square type and would want to change it.
by joe81
May 07, 2017 7:09 pm
Forum: Battery Technology
Topic: Ageing and wear mechanisms in Li-Ion
Replies: 4
Views: 229

Re: Ageing and wear mechanisms in Li-Ion

otherwise it's only the pages of batteryuniversity.com
..but that's general stuff. not answering my questions, such as how the battery's characteristics change after capacity is reduced due to the different wear mechanisms.
by joe81
May 07, 2017 6:55 pm
Forum: E-Bike General Discussion
Topic: Low cost Down Hill Triple Crown Fork
Replies: 34
Views: 8378

Re: Low cost Down Hill Triple Crown Fork

any more real experience with cheap taiwanese/chinese forks here?
my bomber z1 is losing oil and i think it's time to upgrade to DC with simple coil and oil sump (no cartridge!).
by joe81
May 07, 2017 8:04 am
Forum: Battery Technology
Topic: Ageing and wear mechanisms in Li-Ion
Replies: 4
Views: 229

Re: Ageing and wear mechanisms in Li-Ion

thanks. found that already. I agree, it's good stuff!
by joe81
May 06, 2017 11:39 am
Forum: Battery Technology
Topic: Ageing and wear mechanisms in Li-Ion
Replies: 4
Views: 229

Ageing and wear mechanisms in Li-Ion

Hi there,

I would like to understand the mechanisms that age Li-Ion due to
- low voltage
- high voltage
- high temperature
and the results besides loss of capacity.

Any pointers to good online resources?
by joe81
Apr 25, 2017 6:24 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Chinese Ebay Build
Replies: 131
Views: 8818

Re: My Chinese Ebay Build

New wheel arrived 19" front moto with 20mm through axle. Aesthetics are great but the spokes are too long at some points. Every 4th spoke has up to 4mm hangout. so I will have to knock the hangout off each one with a dremmel tool. Offset looks perfect wheel is true. I will assemble on the weekend. ...
by joe81
Apr 07, 2017 10:45 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My Chinese Ebay Build
Replies: 131
Views: 8818

Re: My Chinese Ebay Build

very curious how that frame performs off road. considering it myself.
by joe81
Mar 09, 2017 9:02 pm
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 1985
Views: 184646

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tir

start a name and shame thread if you feel the urge to do it (which i could understand to some extend..), but don't destroy this one.
by joe81
Mar 03, 2017 1:12 am
Forum: E-Bike Technical
Topic: Fixing chainline for single speed - sprocket is way off
Replies: 3
Views: 212

Re: Fixing chainline for single speed - sprocket is way off

Even before I got my motor I wanted to go single speed. Love the simplicity and clean look. I will probably do little pedaling from now on, just like support the motor on steep uphills or when accelerating from standstill. So far I ran the first 200km without a chain and I love it as an electric bik...
by joe81
Mar 02, 2017 11:48 pm
Forum: E-Bike Technical
Topic: Fixing chainline for single speed - sprocket is way off
Replies: 3
Views: 212

Fixing chainline for single speed - sprocket is way off

Hey guys. I received a wheel with a motor that was supposed to be for single speed, but it seems that they just put a single sprocket on a hub designed for use with a cassette. The sprocket is sitting on very little treat already and way too far to the left. Since I have only a 2.25" wide tire the c...
by joe81
Feb 21, 2017 8:03 pm
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 1985
Views: 184646

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tir

thanks Rix. the thing is my bike shop here in a small city in china says they cannot source other spokes anyway. after a long search this is the only shop that i found to have the proper tools and the mechanic seems to know what he is doing (very rare in china..). ..but the description in to the spo...