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- เผยแพร่เมื่อ 6 ก.พ. 2025
- Converting a pit bike to electric using the qs motor 120 70h mid drive motor, votol em100sp controller and 18s 20ah lipo pack, battery frame mount is just a quick mock up/experiment but works well for now, Some riding footage coming asap
Awesome build! This is one of builds that inspired me to build my own electric dirtbike
Thanks buddy glad this helped! Everyone should try building their own!
Great build, I should make my 2T smoker electric.
i love this blog!! sir! how many km range with your battery?
Where did you buy all that thinking of buying
hi how much does the motor weigh?
Approx 9kg
Cool project.👍 You want build mid drive e-bike with qs motor 2kw.😀 Good luck ✌
Hey love this! Want to do something similar with a old pw80. Could I get some more detail on how you are mounting the motor, and what additional parts are needed besides motor speed controller and battery? Thanks!
Thanks bud, I simple bent 6 small brackets to bolt from the edge of the motor to the original engine mounts already on the frame, at first i didn't think it would be strong enough but it is holding up great so far!
other things needed are things such as;
A throttle (im using a throttle box with the normal motorbike cable throttle)
battery connectors (i used xt90 between lipos and larger xt150 to controller, Make sure they are anti spark connectors as 75v will damage the connectors after just a few plug ins)
good quality multi strand silicone wire, at least 8awg
a couple of 2 way, maybe 3 way switches depending on which controller settings youd like to be able to change
Not needed but I also used rubber damper soft mounts to the controller to reduce chance of damage from vibration
Also not needed but i am using a 200A 2 pole battery switch for an emergency disconnect of battery
Hope this helps!
@@VOLITANT Hey thanks for the reply
@@VOLITANT first of all congratulations! The project is awesome! Do you use some kind of BMS in the 3 battery packs connected in serial or something similar? And when you do the controller setup with your computer, in the voltage input you put 18s 67v? Thanks
how to you charge this battery / bike?
Hey, What bike is it?
ahhhh can i have a link to the battery?
Hallo Volitant, this is the coolest e motocross that I ever saw. But I have a question. How much amps can the battery give ?
Hi there'l, thank you! This battery is 20ah and 20c rating so can safely peak at 400A but I only draw 100-150A which is kinder to the battery
@@VOLITANT Ok thank you so much #Subscribed
@Voiltant I'm looking forward to build one of thoese too and I like yours so much because it is so awesome. But for that would need to now wich controller you used. Thank you very much. By the way when you have a 60 volt battery and you give the motor 100 amps you peak out at 6000 watts and the qs 2000 watt 120 70H can only handle 4600 watts peak.
@@leonardschonfeldt1724 no problem! I'm using the em100s controller which can handle 150A on sport mode, these motors are rated way lower than what they can actually handle.
@@VOLITANT Ok Thank you very much
this bike is genius. The future is electric. I want to see a race with an oset mx-10. Yours looks faster (in your riding in the woods video)
Haha thanks! Yeah I would love to have a try on an mx-10! I dont think there is any comparison though as the mx-10 is rated at 1400w whereas mine is nearly 5-10x that power!, they both run 10" wheels though!
I'm waiting for you to make a video about how I connected those batteries. I want to build the same bike
Hi there, it is simply 3 x 6s batteries in series for 18s/66.6v nominal
Sorry, I have an other question. You said that you use 100 to 150 amps? But the EM 100 only kann take 100 contious right
I have the em100s controller which handles up to 150A, I have had no problem at this power with neither the motor or controller getting warm at all
@@VOLITANT ok thank you very much
Hey I’m doing something similar I’m thinking of using the qs 120 kit from electro and co with there 72v 24 ah battery. The kit comes with a votol em 100, the battery and controllers peak amps match up but the battery’s constant amps it can produce is 80, and peak to 120, do you think this would give me decent power and speed
it should still perform great!
the lipos by comparison just never break a sweat with the current delivery (capable of 400A+ bursts) so even when the battery is getting low it still hardly sags as im only running 130-150A.
I'm try the same thing what is the best way to get the sprocket on the motor
Hello bud, the motor comes with a 20mm splined shaft ready to fit commonly sized 420 or 428 size sprockets, most pit bike engines use these sprockets
On the controller , what’s all plugged into the b+ terminal? Obviously the pos of lipos, but looks like a black cable is in there too! Is that the e lock? If so can you explain how to hook it up correctly? Thanks
Hi there, yes the wire/switch required to make the motor run is the E lock wire being connected to the b+ terminal and then you will also need a switch to change between the sport mode and regular 3 speed settings.
I highly recommend reading through the endless sphere forum thread on the em100 and em150 controllers as that helped me massively.
Hope this helps!
@@VOLITANT do you really need a switch to change between sport and regular mode? cant you just set your best settings in and leave it in sport mode? also how do you connect the can bus cable so I can plug into my labtop
@@RexSmithII a switch isn't necessary if you want to leave it in the regular mode as it is set that way as standard but if you wish to permanently leave it in sport mode you will need some kind of connection between the sport mode wire and earth (this can be a wire bridge rather than switch), in the configurator you may need to tick the "enable can bus" on page 1 , if you need more help I highly suggest reading through the Endless-Sphere forum discussion on the em100 and em150 controllers, it helped me massively
Hi where do you find the system for the throttle have you à link thanks!!
Hi Volitan it is me again,
I am building my own one, but I accidently bought a 48 volt battery, so I have to by an other one. I want to build your battery, and I was wondering how the motor can work with 67 volts when the motor is ratet for 72 volts? Would you recommand to rebuild this type of bettery with 3x 6s battery?
Hello bud, this controller is designed for 20s but can operate at a lower voltage I'm not sure of the minimum but 18s is fine, I went with 3x6s to keep it simple but by newest build is 4x5s for 20s lipo
@@VOLITANT Ok Thanks for the fast replay awsome
Do you have a build thread anywhere..your bike is nuts , would love to follow your footsteps..why are you only limited to 100amps? So basically on a 18s setup your really only getting 66.6v x 100 amps? That’s only 6.66kw?
haha cheers bud! Yeah I had a thread on planetminis, should update it really www.planetminis.com/threads/frankenstein-budget-build-possible-future-electric-conversion-project.252128/
Yes thats correct, only 6.6kw nominal now, of course more power from full charge though.
The controller is unlocked but not advised past 20s and 150A however even at 100A its still way to much power for such small wheels, if you can get any grip then the acceleration is pretty insane to 50mph
At 1:22 and 1:41 what is that? Can you buy it?
Hello bud, here it is m.aliexpress.com/item/32954909008.html?trace=wwwdetail2mobilesitedetail&spm=a2g0s.9042311.0.0.4f404c4dyWuDDT
Great value for money
@@VOLITANT it’s so cool!! And it makes so much sense
Nice bike! Just got this controller. Plan to use 17s battery. Can you set the undervoltage down to 55v?
Thank you bud!, I think it will be fine at that undervoltage, but don't take my word for it as I haven't tried it
That would take u to 54.4 volts at 3.2 volts per cell. If its lipo itll be cutting it close if its lithium ion u should be fine
Yes this works
hi what's that throttle to sensor called as can't find them also links to parts would be nice I got a spare frame from a m2r doing nothing
Is the m2r a 12/14" wheel bike? if so that size tyres would be far more suited to this motor as it offers way more grip however due to the limit of large sprockets available the top speed on a 12" bike will be much higher, with my current 10" wheel set up im already pushing 50+mph which is way more than id ever need riding off road and whilst 50 might not sound that quick, the acceleration is completely insane, just something to bear in mind.
Heres the throttle box:
www.aliexpress.com/item/32954909008.html?spm=a2g0s.9042311.0.0.37fa4c4d019WEX
Heres the motor:
www.aliexpress.com/item/33056354249.html?spm=a2g0s.9042311.0.0.37fa4c4d019WEX
@@VOLITANT hi again yes it's a 12 14 setup it's the trellis style of frame aswell and thanks for the links very handy. for future reference delete the gas tank and put a battery there also the sub frame has some space
@@kyle12367 That would be great to see a video when you get it done!
yes I thought a lot about using the original tank space but the battery or controller couldn't fit there, I have now drilled the tank out to reduce weight and hide wires inside and then mounted an lcd watt meter screen where the fuel cap was, the bike has changed a bit since this video now
@@VOLITANT I'm gonna use the guts of a mobility scooter to get it rolling before I go spend upwards of £500 on motor battery etc. can get the big fast and chunky scooters round here for less than £100 working.
i was looking to do the exact same, with the same motor and controller. This is soo cool. I'm glad i found this video. how long does it last with those RC batteries? Think its fast enough, or should i go with the 72V 3000W motor? Really awesome job!
Thanks! With my current battery I get around 10-15 miles but depends on how you ride and many other factors of course, I could easily fit twice the capacity I have currently though so the battery is on the smaller side atm, It is geared for around 50 mph which is way more than enough for me but the acceleration is just ballistic haha
For this size bike i wouldn't even consider the "3000w" version as mine is already complete overkill if you ask me, qsmotor does make a "1000w" version which would probably be perfect for my size bike but unfortunately it only comes with a belt drive shaft
@@VOLITANT well, I ordered the 3000W version and a 12/14 roller. Game on! Haha. I gotta say, your video here pushed me to do it. Cant wait to go up against a daytona 190 with this thing!
@@mxstar1 When you get yours wired up I'd like to see it against a 190 or other pit bike. I'm trying to decide between the 2000w and 3000w too
@@anythatarent2 hey u wanna send me a 190 I will.gladly put them up against each other!
Dude is that the standard throttle for that controller i.e cable version?Not seen one before🤔You got a link bud👍
hello bud, its not for this controller, I bought it separately but its been working great! only cost £6 so I bought two in case but it hasn't let me down yet.
I really hated most of the wired versions as they are very weak, and the domino? throttle was a bit pricey for my liking
www.aliexpress.com/item/32954909008.html?spm=a2g0s.9042311.0.0.4f404c4dyWuDDT
@@VOLITANT Brill, thx for the reply and link bud.Yeah the hard wired version feel shite and no real middle ground very all or nothing lol.
What pit bike frame did you use?
its a crf50 size clone frame
This is the 2000w version. It should be in the title
I have added 2000w to the title, it should be known that it does not reflect the power output of this motor however
@@VOLITANT so what can you safely pull with it?
@@je7647 I have run this motor at 12kw and the motor only gets to around 35c degrees, these motors can handle around 100c, I have never seen it that hot but have seen other people push this motor to 15-20kw in bursts
I really want to do this do you know of any guides?
Sorry bud, not that I know of, but Endless-sphere forum has a whole load of information which helped me massively
hey do you mind sending me your controller settings (the one on the computer), and also what sprocket size are u using ?
Hi there, My Controller settings are basically stock except I have set busbar amps to 100A and I mostly only use sport mode, I am currently running 13t front 41t rear and approx 15" wheel diameter with tyre
@@VOLITANT how do you set it up to be in sports mode? and what's your pole pairs and hall shift angle value? I've been having trouble with these values
What motor name, motor how many kw?
minh thuan nguyen just go on AliExpress and search up 2kw mid drive motor, oh and just FYI if you want to know the “kw” of a motor and you only have watts, every thousand watts is a kilowatt
QS Motor Mid drive 120 2000 watt 70h
I am making 1 aswell
would love to see it!
@@VOLITANT Im turning My apprilia into a electric 1
What is it at 1:22 ?
Mechanical to electric trottle
How much run time do you get out of this?
depends how fast/slow you ride, rider weight, terrain etc but on average I get around 10-15 miles, I could stretch to probably 30+ if i ride as efficiently as possible the whole time, My current battery pack is on the small side though
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