Great project man! We really ned some effortable electric pitbike, this would set a wohle new bench mark in terms of backyard dirtpark or pumptrack riding.
Thanks! Which part are you referring too? The sub frame is normally considered the part which supports your seat/rear mudguard or are you referring to the part which the battery is mounted to?
Thanks bud, That's awesome! Yeah you will need a 420 sprocket with 20mm spline shaft, these are often sold very cheap as pit bike sprockets. They come in both 420 and 428 pitch but double check its a 20mm not 17mm shaft sprocket
Thanks, As far as you Mentioned sprocket noise at low teeth. Because I was trying to get super low gear for a off-road scooter, you think 11 teeth I will get tired of the noise?
@@RexSmithII its hard to say you'll just have to experiment, the sprockets can be bought for a couple £$ each. Below 13 tooth does make quite a bit more noise, I could deal with the noise easily myself i just prefer the bike to be as stealth as possible
@@RexSmithII Thats weird, They are normally happy to custom orders etc. Mine is unlocked, I can change the busbar current, but have never gone over the 150A limit (now running at 100A) Did they tell you which value the busbar current is set to? There is also a phase current setting in the controller which is set to the max value from purchase but doesn't really need to be changed
Nice video! Thats a cool project! Its a ripper! I liked your video! Would you mind checking out our channel if you get a chance? we do crazy videos with pitbikes, fireworks and cars! Thanks! Love the video!
Where can I find the exact dimensions of this motor, I don’t see it on qs’s website or on the page to buy the motor. These motors look quite small so I’m curious if I could cram it into a razor dirt bike frame but where the motor mounts is quite tight (135mm excluding shaft of the motor)
That's a good question, I think the dimensions may be listed on the aliexpress listing, my motor is approx 140mm diamter by 185mm in length including the shaft, that said though this motor is more than likely waaay to powerful for a razor, qs does sell a smaller "1000w" version which is still damn powerful however I think it might only come with a splined belt sprocket
VOLITANT hmmm it seems doable. Possibly mounting the motor slightly higher is an option. I saw some guy put a motoenergy motor in one... guess it’ll take some more researching. I remember only seeing the “1000w” with a belt sprocket so that’s why I looked at the “2000w”. I’m well aware that putting a motor like this capable of over 10kW is way overpowered for a frame that’s smaller than your pit bike but honestly the price of a generic 3kW motor is already $300 and the 2kW version I already have on it doesn’t really put down the torque I want and gets too hot to touch in around 15 minutes of fast riding (not even in the dirt). This is also with an SLA pack that sags badly and doesn’t feed the controller everything it can take so a lipo pack would only heat up the motor faster. I figure it would make more sense to have a motor that’s overpowered and needs to be tamed down a bit than have motors that are approaching their thermal limits. Anyways thanks for the measurements! if I ever do end up cramming one of these motors in I’ll be sure to send a link your way but that’ll probably be a while from now
Great project man! We really ned some effortable electric pitbike, this would set a wohle new bench mark in terms of backyard dirtpark or pumptrack riding.
Awesome build 👏
Would u consider selling the frame u made I'm Interested
Nice build ! Did you build the sub Frame ? or purchased and where from ?
Thanks! Which part are you referring too? The sub frame is normally considered the part which supports your seat/rear mudguard or are you referring to the part which the battery is mounted to?
@@VOLITANT The lower engine enclosure/ skid plate thing ?
@@ShiftyRaccoon ah i built that myself from scrap stainless steel tube and aluminium sheet
@@VOLITANTThanks looks really good mate. Trying to build the same thing
Can you link me to the motor and controller you used buddy thank you
www.aliexpress.com/item/33056354249.html?spm=2114.12010612.8148356.30.543563f84Jjq7c
@@VOLITANT Hi! great job, how did you sort out the throttle?? You are using a regular one right?
@@RCarrasco54 I'm using a regular motorbike cable throttle with an akcnd throttle box for the motor controller from AliExpress
great job. Im about to order all my parts , just searching forms on how to to swtich to a 420 motor sprocket? do you know which ones fit?
Thanks bud, That's awesome!
Yeah you will need a 420 sprocket with 20mm spline shaft, these are often sold very cheap as pit bike sprockets.
They come in both 420 and 428 pitch but double check its a 20mm not 17mm shaft sprocket
Thanks,
As far as you Mentioned sprocket noise at low teeth. Because I was trying to get super low gear for a off-road scooter, you think 11 teeth I will get tired of the noise?
@@RexSmithII its hard to say you'll just have to experiment, the sprockets can be bought for a couple £$ each.
Below 13 tooth does make quite a bit more noise, I could deal with the noise easily myself i just prefer the bike to be as stealth as possible
Ali express doesn’t want to sell the em controller unlocked so I was wondering how did you change your bus bar current was your controller unlocked?
@@RexSmithII Thats weird, They are normally happy to custom orders etc.
Mine is unlocked, I can change the busbar current, but have never gone over the 150A limit (now running at 100A)
Did they tell you which value the busbar current is set to?
There is also a phase current setting in the controller which is set to the max value from purchase but doesn't really need to be changed
What’s your current gearing and what is your top speed. Looks like you have plenty of torque just curious about the top end speed
Hi there, im running 13/41t gearing and top speed is exactly 50mph on gps
VOLITANT thanks for the Info.. is that speed still on a 10” rim. You have inspired me to build something similar with this kit.
@@Tretch-rx7ef No problem! yes that's with 10" rim and knobbly tyres on the road
VOLITANT is that with the controller set to 100amps? Or what’s your current limited at?
@@Tretch-rx7ef yeah I've limited my controller at 100A, the maximum is 150A.
I'm also only running 18s whilst the controller is 20s capable
What kind of battery did you pair it with and how long does it run for / charge time?
using 3 large 6s 20ah rc lipos in series for 18s 20ah, run time depends on how you ride, charge time in 2 hours with my current charger
VOLITANT thanks for the info! 👍
👍
Nice video! Thats a cool project! Its a ripper! I liked your video! Would you mind checking out our channel if you get a chance? we do crazy videos with pitbikes, fireworks and cars! Thanks! Love the video!
thanks will do!
Where can I find the exact dimensions of this motor, I don’t see it on qs’s website or on the page to buy the motor. These motors look quite small so I’m curious if I could cram it into a razor dirt bike frame but where the motor mounts is quite tight (135mm excluding shaft of the motor)
That's a good question, I think the dimensions may be listed on the aliexpress listing, my motor is approx 140mm diamter by 185mm in length including the shaft, that said though this motor is more than likely waaay to powerful for a razor, qs does sell a smaller "1000w" version which is still damn powerful however I think it might only come with a splined belt sprocket
Approx 165mm without shaft
VOLITANT hmmm it seems doable. Possibly mounting the motor slightly higher is an option. I saw some guy put a motoenergy motor in one... guess it’ll take some more researching. I remember only seeing the “1000w” with a belt sprocket so that’s why I looked at the “2000w”. I’m well aware that putting a motor like this capable of over 10kW is way overpowered for a frame that’s smaller than your pit bike but honestly the price of a generic 3kW motor is already $300 and the 2kW version I already have on it doesn’t really put down the torque I want and gets too hot to touch in around 15 minutes of fast riding (not even in the dirt). This is also with an SLA pack that sags badly and doesn’t feed the controller everything it can take so a lipo pack would only heat up the motor faster. I figure it would make more sense to have a motor that’s overpowered and needs to be tamed down a bit than have motors that are approaching their thermal limits.
Anyways thanks for the measurements! if I ever do end up cramming one of these motors in I’ll be sure to send a link your way but that’ll probably be a while from now
Oh yeah I’ll also add that my current motor is 160mm with the shaft so accommodating an extra 25mm (about an inch) seems doable