Super 73 power upgrade

[butters149]

Hello,

I currently have a super 73 S1 with a 48V system and 500 rear fat motor. I am very new to this but I would like to have more torque and speed. I've been reading that the QS205 motor is good, but that is all I know. Are there any suggested kits and parts for someone new like me to have installed? Thanks,

 

[2old]

That's one of many possible choices, but if your frame is aluminum you should check the rear dropout width which may limit your options. I added a front hub motor to a similar system and it added a lot of torque, too much in fact.

 

[butters149]

Hello,

I currently have a super 73 S1 with a 48V system and 500 rear fat motor. I am very new to this but I would like to have more torque and speed. I've been reading that the QS205 motor is good, but that is all I know. Perhaps adding a front motor?

Are there any suggested kits and parts for someone new like me to have installed? Thanks,

 

[markz]

super 73 S1
8V system and 500 rear fat motor.
more torque and speed.
QS205 is good,
Perhaps adding a front motor?

Are there any suggested kits and parts for someone new like me to have installed? Thanks,

Hello,

Welcome to the forum the Super 73 S1 looks like a neat little mini-style pit bike made for offroad.
If you want more torque then you need more amps the options are lacing a hub motor into a smaller wheel diameter, increasing the controller's "amp" rating or moving over to a mid drive system where you can use the gearing of a regular bicycles rear gears. Your 500W rear motor is quite weak, so its understandable that you are wanting maximum power! A powerful front motor is the last thing you want, what you want is a powerful rear motor, along with some heavy duty torque arms to stop the axle of the motor from spinning. I make mine out of 1/4" steel and a grinder and some hose clamps. You can go with the QS205 motor, its a popular motor, or you can buy the MXUS 3000W motor, or the MXUS 5000W, also the Leafmotor 1500W is a great motor also.
https://www.leafbike.com/

What size a tire are those beasts? :lol: 8)
Perhaps a 20 incher :wink: :lol: thats what she says hehehehehe hiccup
20 inch 48V 1500W rear hub motor - bike conversion kit fit for 2.75 to 3.00 inch tire $346.00usd
This is probably a thinner inch tire as stated above - 20 inch 48V 1500W rear hub motor - bike conversion kit $336.00usd

I'd assume the ones in the know are out of the game by now, and I would assume this is the Generic clones for MXUS by name of C&D
https://www.aliexpress.com/store/group/MXUS-E-bike-kits/738588_256610678/4.html#!

Or the real deal here, MXUS
https://ebikemotor.en.alibaba.com/?spm=a2700.details.cordpanyb.1.665153a7Nkzpy4
There is a whole thread on the MXUS 3000W here on Endless Sphere
https://endless-sphere.com/forums/viewtopic.php?f=2&t=92101&hilit=mxus+3000#p1345068
Lots of info, like rpm/volt which is your KV. The higher the KV, the lower the motor winding count is (eg. 3T or a 4T)

Here is the thread on the 5kw from MXUS, TeslaNV started this one. Not sure if he is still selling either of them, if so a great source to grab one!
https://endless-sphere.com/forums/viewtopic.php?f=30&t=85582&hilit=mxus#p1251770
Please remember that the 5kw motor has a wider axle flats, I do believe 155 or 165 or something like that.
Not sure why they went with 2 sets of halls. I just started riding without halls on a SENSORLESS controller and its the same as the generic controllers trapezoidal waveform.

 

[butters149]

I just measured my dropout and it is 170mm. would the mxus motor work if theirs is thinner?

 

[butters149]

I did a little more research and this motor (https://www.aliexpress.com/item/BAFANG-48V750W-Brushless-Geared-Cassette-Motor-RMG06-DC-750W-Rear-Hub-Motor-CST-OLD-190mm-Cassette/32870998834.html?src=google&albslr=220414336&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=1719927048&albag=67446816615&trgt=648836300615&crea=en32870998834&netw=u&device=c&gclid=Cj0KCQiAtvPjBRDPARIsAJfZz0qJ1yP9iglYVYvgl42zmugpe1Z0JQbKmy3vrWauWQXph-s_J02GobsaAp5REALw_wcB&gclsrc=aw.ds) looks good.

I am thinking going with a 52V battery but not sure of a controller that would still allow me to turn on and off my front and rear tail lights?

 

[E-HP]

I did a little more research and this motor (https://www.aliexpress.com/item/BAFANG-48V750W-Brushless-Geared-Cassette-Motor-RMG06-DC-750W-Rear-Hub-Motor-CST-OLD-190mm-Cassette/32870998834.html?src=google&albslr=220414336&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=1719927048&albag=67446816615&trgt=648836300615&crea=en32870998834&netw=u&device=c&gclid=Cj0KCQiAtvPjBRDPARIsAJfZz0qJ1yP9iglYVYvgl42zmugpe1Z0JQbKmy3vrWauWQXph-s_J02GobsaAp5REALw_wcB&gclsrc=aw.ds) looks good.

That motor looks like it's designed for wider dropouts.

 

[butters149]

That motor has a 190mm dropout? Mine is 170mm. I was also thinking of the QS205, but i think it is a 150mm dropout, would spacers work?

 

[speedyebikenoob]

How much more power do you actually want? If it's not that much more, you could probably just upgrade your controller. I can imagine 500w feeling pretty sluggish though, I have a 500 watt e scooter and it overheats pretty easily up hills, so its understandable you want more power.

 

[FrankTheTank]

Hello,

I currently have a super 73 S1 with a 48V system and 500 rear fat motor. I am very new to this but I would like to have more torque and speed. I've been reading that the QS205 motor is good, but that is all I know. Are there any suggested kits and parts for someone new like me to have installed? Thanks,

Apologiesfor resurrecting an old thread but curious about how this project went? Looking to do the same in the near future.

 

[boytitan]

doubt it went great from advice given not being great.

I didn't see this post but that was terrible advice.

The super 73 uses a fatbike 170mm rear axle so a hub motor designd for fat bikes would have worked. Ebikeling 1500w fatbike hub motor kit and a 52 volt battery would have worked great. leaf bike also had a 1500w fatbike hub motor kit not sure.

Putting a higher amp controller on the super 73 defualt battery is a bad idea as the quality of their battery is unknown. Might as well upgrade the motor battery and controller all at once.

If you can wait for shipping from china theres a 45 amp controller on ebay I can link, that comes with a programed 650c color lcp display that's better than the sw900 display that comes with ebikeling kits and you can then get that and a 60 volt battery and be set for a decent power upgrade at over 2000 watts. Get a 60 volt 20 ah battery for such a set up. Plus you can make some money back off of the ebikeling controller and lcd display.

 

[FrankTheTank]

Yo! Boytitan

Thanks for the reply it's much appreciated. When I originally posted this my bike was spaking new and wanted to put some miles on it before I begin throwing any more $ into it. This is a long term planning project so waiting times are ok. I'm happy using my bike as is until it breaks down which would quickly justify a full motor/controller/battery upgrade.

From your post, I only see a 1200w motor from ebikeling and it's not 52v. Does the motor voltage need to match the 52 battery voltage?
https://ebikeling.com/products/waterproof-kit-48v-1200w-20-fat-tire-direct-drive-rear?_pos=3&_sid=bd8fc2c0b&_ss=r

There's also this one, it says it's a 20" conversion kit but i don't see how it converts. The hub looks skinny.
https://ebikeling.com/products/waterproof-kit-48v-1500w-26-700c-direct-drive-front-rear

With my lack of knowledge considering this 2000w kit as an option. Says it firts 20" x4" Super 73 tires too.
https://www.leafbike.com/products/beach-snow-fat-bike-kit/20-inch-48v-2000w-rear-hub-motor-beach-snow-fat-tire-bike-conversion-kit-1086.html



BTW happy to buy you a beer for picking your brain!

Cheers!