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Electric Cowboy created the thread Started a new blog for real news and real bikes!.
" Electric.Motorcycles is our new blog, it seems the articles are doing OK. https://www.electric.motorcycles/ "

14 Hours Ago

ElMotoMike clicked Likes for this post: Weird Electric motorcycle. by EVcycle

1 Day Ago

Richard230 replied to the thread Weird Electric motorcycle..
" I have seen that "woody" before, here and there, probably starting about a month ago. Looks like a great vehicle to be displayed in a French industrial art museum. So far I haven't seen anything about the cost. I bet it will sell for around $100K, though. "

1 Day Ago

EVcycle created the thread Weird Electric motorcycle..
" This may have been posted already?

https://www.cars-show.org/motorcycle...by-newron.html


Ed "

1 Day Ago

flo replied to the thread Sachs xtc 125 conversion.
" Hi all,
now have a little more than 1000km on the xtc (620 ish miles)
weather was not too favourable to ride lately.

bike has performed flawlessly so far, using self locking or locktided screws exclusively nothing has come off or got loose.
So basically the bike is near maintenance free to use.

Making the most out of the rainy weather i have replaced the back wheels bearings like i already did on the front.
Now the power consumption at 100kph on a flat is down to about 6,4Kw - the previous mentioned 6,3 have been a typo and should have been 7,3 ish KW.
Quite a difference and a recomendation to everyone trying to get some more miles out of their ev - look after the bearings as well.
Total cost of two sets of skf bearings .. aprox 10 Euro - savings in power consumption at 100kph (62mi) aprox 1,2kw . Well worth it -if not for money spend- at least for range gained.

Talking about range:
Reprogrammed the kelly`s cutt off down to 3.2 V per cell so it powers down at aprox 3.35 under load i finally performed a real range test yesturday.
To get you all facts: my single cell monitors alarm start at 3.45 V per cell
and i have - for the first time the since the charger arrived ballanced the pack- went from 0,04v difference down to 0,04V difference.
That only proves two things:
cells had not drifted in those aprox 12-15 charges and the cells simply "sit" at slightly different voltages.

Back to the range test:
first 45km i spend simply hooligan the bike around as much as to stay at least not too far off the legal side of traffic. accellerating fully to say 110kph and staying there, I knew i would get at least that range...
I then opted to "loop " around my village in a more civilised manner - lets call it commuting style in order to find out how much more there really was. Still accellerating full but keeping it between 85-90, no overtaking...
Well At exactly 75km (42mi) the weekest cell hit 3,45 Volts causing alarm while speeding up so from than on i rode it more cruizing style to see whats still left in it. Speed was sitll kept at about 85kph..
80km into the ride (49 ish mi) the Cycle Analyst showed exactly 50Amphrs consumed and Cells showed about 3,49 volts at cruizing load..so i turned home.

84km , 52 Amphr i stopped at home. cells would still read 3,47V average at cruize and cell voltage jumped up to 3,53 av. at standstill. perfect comparison to my calculations and user profile predifined for the cells.
I am sure if ridden in a tame manner and somewhat slow i could get another 8-10 km out of the cells - while it may cause some voltage alarms while doing so each cell would surely stay safe above 3.3V at load.
I wasn`t about to test that for simply not wanting to take chances and maybe even damage the pack for no need at all...

mostly flat, a few smallish hills in between , hardly any wind and temp about 17-18 deg. C.

Conclusion:
I can savely asume to get about 75 to 80 km per ride, with another 10km or so reserve to "drag me home" at reasonable/slow speed and mild accelleration. If i want to extend my range that is... much more fun to spend it all on say 50-55 km rides

Power consumption on this ride comes to

0,61 Amphr/km or exactly 1 Amphr per mile
asuming average 82Volt (90Volts charged, 77 depleted)
that translates to
about 50 whr/ km or aprox 80 whr/mile

seems quite efficient to me so if one thinks about a conversion maybe consider a light, low and fully faired bike for maximum range.
Might be of intrest as well:
Total capacity (charged to 4,2V) would be 90Aphrs /8,1KWh
as used (4,1V down to 3,45 nominal) slightly above 52 Amphrs - might get 57 out if driven slowly (at 62 nominal)

so calculate enough extra to actually achive your range..

greets

flo "

1 Day Ago

Richard230 clicked Likes for this post: Electric Harley? by Stevo

5 Days Ago

Stevo replied to the thread Electric Harley?.
" Maybe Mattel or Hasbro will buy Harley-Davidson when they go bankrupt... because those toys look fun! LOL "

5 Days Ago

Warren replied to the thread Electric Harley?.
" My favorite electric Harley, so far. Affordable too.

https://www.harley-davidson.com/us/e...nce-bikes.html

Harley's amazing marketing. They ran these at the X-Games, with no mention of the LiveWire. The commentators at the end of the race say, "Those things look super fun." "I want one. Like, an adult sized one." "

6 Days Ago

frodus replied to the thread Bike components check.
" 72V ought to give you higher speed. I'd probably recommend at least 72V. "

1 Week Ago

anonjihen replied to the thread Bike components check.
"
Quote Originally Posted by Stevo View Post
Your goal of a 150lb bike with a 55mph top speed and range of 50 miles is a bit optimistic with 4 Pb acid batteries. I'm guessing the batts will weigh in at around 20 lbs each... thats 80lbs just for battery weight.... and you will be disappointed with the power output of those batts as well. Not to mention that you already are working with a pretty small bike chassis.
But don't be discouraged....building your own electric scoot is a big endeavor with lots of lessons to learn. I would just steer you away from lead acid batteries as a waste of time and money. My first attempt of building an emc 9 years ago used Pb acid batteries and although it worked, it was very heavy and very underpowered.
Definitely keep your eyes open for a good deal on Nissan Leaf cells... its your best and most affordable option
Thanks for the advice. Do you know of any places or kinds of places should be looking for Nissan Leaf cells, other than the forums?

Quote Originally Posted by frodus View Post
I think that you should get a paired motor/controller combo rather than try to get individual parts like that and doing it yourself. I don't know of any file that exists for the 1305 motor for the Sevcon at the moment, so unless you have a dyno and experience tuning Sevcon, you're going to have a lot of trouble. You'll spend more time getting it working than putting the vehicle together.

Look around on the forums for some used motors/controllers if this is a first build. See how you like it, then you can decide if you want to upgrade, and pass along the motor/controller to someone else.
That's probably a better idea, I'll keep a lookout. I'm not in any hurry to build this, and it's mostly for learning purposes anyway.



Am I at least looking into the right type of motor in terms of power at least? 7kw/100amps, 48v, 5000rpm minimum? Would it be more advantageous to look into 72volts over 48v? "

1 Week Ago

frodus replied to the thread Bike components check.
" I think that you should get a paired motor/controller combo rather than try to get individual parts like that and doing it yourself. I don't know of any file that exists for the 1305 motor for the Sevcon at the moment, so unless you have a dyno and experience tuning Sevcon, you're going to have a lot of trouble. You'll spend more time getting it working than putting the vehicle together.

Look around on the forums for some used motors/controllers if this is a first build. See how you like it, then you can decide if you want to upgrade, and pass along the motor/controller to someone else. "

1 Week Ago

frodus replied to the thread Lifep04 or LTO.
" They're made for an EV, so it's going to be something like 2-3000 cycles 100% which would give you about 80% capacity at that point.

There's lots of data out there, just got to search for some sites,
like Hybrid Auto Center: https://www.hybridautocenter.com/HAC...ule&Itemid=605 "

1 Week Ago

Stevo clicked Likes for this post: H2 vs electrical power by Richard230

1 Week Ago

mindowgas replied to the thread Help choosing a motor.
" Hey, I have a brand new Emrax 228 Medium Voltage combined cooling, here is some reference motor info: https://emrax.com/products/emrax-228/
I bought it for my electric project but never got to use it. If interested the price is $4500.
I also have the Bamocar motor controller that is suitable for this motor the price for controller is $5500.

The motor is capable of delivering 100kW peak power and 230Nm peak torque, and it weighs only 12.3 kg. "

1 Week Ago

Stevo replied to the thread Bike components check.
" Your goal of a 150lb bike with a 55mph top speed and range of 50 miles is a bit optimistic with 4 Pb acid batteries. I'm guessing the batts will weigh in at around 20 lbs each... thats 80lbs just for battery weight.... and you will be disappointed with the power output of those batts as well. Not to mention that you already are working with a pretty small bike chassis.
But don't be discouraged....building your own electric scoot is a big endeavor with lots of lessons to learn. I would just steer you away from lead acid batteries as a waste of time and money. My first attempt of building an emc 9 years ago used Pb acid batteries and although it worked, it was very heavy and very underpowered.
Definitely keep your eyes open for a good deal on Nissan Leaf cells... its your best and most affordable option "

1 Week Ago

Richard230 created the thread Battery tech discussion video.
" This is a very informative video discussing lithium battery technology, its problems, why batteries degrade, how their manufacturing can be improved in the future and then discusses the advantages and disadvantages of "ultra capacitors":
https://www.youtube.com/watch?v=DE_PZQ13YTY: "

1 Week Ago

Richard230 created the thread H2 vs electrical power.
" This is an interesting video discussing the economic and efficiency merits of both H2 and electrical powered vehicles: https://www.youtube.com/watch?v=f7MzFfuNOtY "

1 Week Ago

anonjihen created the thread Bike components check.
" Hey everyone. I've been reading up here and on other sites for a couple of months now and I was hoping to get some feedback on my potential build and to make sure I understand correctly everything I've learned (lol). Thank you in advance to anyone that reads this.

The original bike is a 1981 Honda NC50. When it was alive it had a 50cc motor and a top speed of about 30 mph, I was originally going to bump up the engine to 70cc and replace several parts on it but decided to just convert to electric instead. If this goes alright, I plan to buy a standard motorcycle later and convert it to electric too.

My goal is to get the bike up to 55 mph and a minimum range of 30 or 40 miles. I'm guessing with everything on it, the bike will be 100-150lbs, rider weight of 150-200lb. The back wheel, with tire, is 18.5".

EV parts:
Motor: Motenergy ME-1305 BLDC 24-48v, 100 amps continuous, 5000 rpm ( https://www.evdrives.com/ProductDeta...E1305&CartID=1 )

15-tooth motor sprocket

Motor Controller: Sevcon G4827 ( https://www.thunderstruck-ev.com/sevcon-g4827.html )

Rear Wheel Sprocket: 32 teeth

Contactor: Tyco LEV200 ( https://www.thunderstruck-ev.com/tyco-lev200.html )

Throttle: Magura Twist Grip ( https://www.evdrives.com/product_p/thr-magura-assy.htm )

Batteries: 4* 12v 26Ah sealed lead acid batteries ( https://www.remybattery.com/ps-12260-sla-battery.html )

Main Fuse ( https://www.evdrives.com/product_p/fs-ann250.htm )

Pre-Charge Resistor ( https://www.evdrives.com/category_s/1947.htm )

Charger: tbd

Spedometer/display: tbd

So I guess my main question is: Does this combination of parts look correct to achieve my goal? Am I forgetting anything? Are there better places to buy motors and parts for cheaper? I know I could buy a cheaper brushed motor but I'd rather have brushless so I'm fine with the increase in price for that.

Additionally, what kind of charger should I get for this? Any suggestions?

Does anyone have any strong opinions on the Motenergy ME-1305 vs other motors? I was also considering the Mars 0907 BLDC ( https://www.cloudelectric.com/produc...-mars-0907.htm ) which might allow for a cheaper controller, but everyone I've read suggests a Kelly for it but that those are also apparently very unreliable - but all of that was also from 5+ years ago. Is this still true? Should I look into that instead? Or is there another compatible controller for the Mars 0907?

I'll be fabricating my own mounts and bodywork to protect the components, etc.

Thanks! Sorry if this sounds ridiculous - I'm still learning. "

1 Week Ago

Zero_Phobia replied to the thread Lifep04 or LTO.
" Perfect, I'll see if I can order some, thanks dude. Any idea what the cycles on them are? "

1 Week Ago

frodus replied to the thread Lifep04 or LTO.
" I don't know in South Africa though, but we get them at Hybrid Auto Specialists here in the states. Either gen1 or 2 is fine. "

1 Week Ago