Upgrading a Nitro ECO Tiger 1300W 48V

[FreTurbo]

Hi there,

I am new here and would love to have some help with upgrading my sons 48v 1300W dirtbike.

The topspeed now is about 32km/h , I myself have a KTM E-SX, we drive together alot, so it would be nice if he will have a bit more power and top speed.

This is the model I have bought in August : https://www.quadexpress.be/product.php?id=215&Tiger%201300W%2048V%20LITHIUM-ION%20MOTO%20%C3%89LECTRIQUE

It's powered by a 1300W 48V motor with a 48V 13Ah Li-Ion battery.

You can find some pics of the motor controller and battery here : https://photos.google.com/share/AF1QipNyRCdZTEvxNRH1pNyJRBewymJRqQb_cnGlbwCGo8wD_60j4AFjEdcozh1vqRecHg?key=UkwwczNtQXVxbjdYZU94TDF5eW8yQTZMdG1kNHVn

Maybe the easiest would be to go to 60V or even 72V? Can I still use the current motor?

I will have to buy a new controller probably, which one do you advice?

I will also have to find a 60 or 72V battery that fits the bike...

Thanks in advance,
Fre

 

[FreTurbo]

Hi,

Nobody? I don't know where to start...

Can I add a Li Ion pack of 12V or maybe 24V in series if it's approx the same capacity (13Ah)?

What controller you advice? The stock motor will probably be okay?

If I go from 48V to 60V I will have a power increase from 1300W to 2161W and a 25% rpm increase from the calculator.

That will bring me to a top speed increase of about 8km/h.

Thanks,
Fre

 

[FreTurbo]

Do you think this controller will suit : https://www.ebay.at/itm/2000W-48V-72V-E-Bike-Steuergerat-E-Scooter-Fahrrad-Motor-Brushless-Controller-DE/392795244471?hash=item5b746bc7b7:g:V6wAAOSwhl1euRoq

If I put a 72V battery inside, normally the motor will pull 2594W, is that a problem for the 2000W limit of the controller?

Will my 1300W stock motor take this wattage?

Or maybe this controller? : https://kellycontroller.com/shop/kbs-e/

Will it also make the bike faster with the 48V stock battery? It will deliver more current than the stock unit...

 

[MorbidlyObeseKoala]

Haven't seen anyone try to upgrade this type of dirt bike yet, but I am very interested since it looks like that is available in several countries and has better components than Razor or some of the other toys.

First impressions about putting more voltage through the system is you will blow your controller or your motor. In general, what I have seen on here and other forums is you can usually over-volt your motor but it may overheat and fail sooner. If you upgrade your battery and controller with your max wattage in mind, likely your only weak link will be the motor.

Seems like a small spot to squeeze a new motor in if you wanted a larger one.

But hey, it's your bike. Feel free to swap things out and upgrade as much as you can as long as you don't shock yourself or burn down your garage. Research some other ebike builds on this forum, put in some fuses and fail safes. Test it out and put your findings here so other people can learn from it.

 

[FreTurbo]

Hi,

Thanks for your reply.
The dirtbike is indeed pretty good quality, it has good shocks, nice wheels and pretty good brakes.
So it's safe in my eyes to up the power quite a bit.

I think I am going to start with a new controller with more Amp limit...

Fre

 

[1DMF]

I am currently pimping my 1200w dirt bike.

For 72v to give 2KW that's only @30Amps. Power (watts) is Volts x Amps

Also upgrading the controller only is like the problem I have, going to kill the current 48v battery, as it's likely only a 30A 20AH battery, if you put a more powerful controller on it, it will suck the battery dry much quicker and might kill it if poor BMS.

I am looking to overvolt a 48v 2kw motor I replaced the 1200w motor with to 60v, not sure putting 72v through a 48v 1300w motor is a good idea, even 60v might fry it?

Also if you overvolt a motor, it doesn't increase the draw on the controller, the controller will deliver x voltage and x amps, if the voltage is more than the motor is designed for the motor will spin faster and have more power, it won't mean the controller is putting out greater than 2KW, it is still watts = volts x amps

The biggest problem you are going to find is where to get a better battery from and how you are going to fit it in the bike!

This is currently where I am at and am starting to lose the will to live and might just put the old motor back on the bike!

 

[FreTurbo]

I am currently pimping my 1200w dirt bike.

For 72v to give 2KW that's only @30Amps. Power (watts) is Volts x Amps

Also upgrading the controller only is like the problem I have, going to kill the current 48v battery, as it's likely only a 30A 20AH battery, if you put a more powerful controller on it, it will suck the battery dry much quicker and might kill it if poor BMS.

I am looking to overvolt a 48v 2kw motor I replaced the 1200w motor with to 60v, not sure putting 72v through a 48v 1300w motor is a good idea, even 60v might fry it?

Also if you overvolt a motor, it doesn't increase the draw on the controller, the controller will deliver x voltage and x amps, if the voltage is more than the motor is designed for the motor will spin faster and have more power, it won't mean the controller is putting out greater than 2KW, it is still watts = volts x amps

The biggest problem you are going to find is where to get a better battery from and how you are going to fit it in the bike!

This is currently where I am at and am starting to lose the will to live and might just put the old motor back on the bike!

Yeah, I also looked into some 72V batteries with 20Ah, they are indeed alot bigger. Another problem, the stock motor is also pretty small, so I don't know if I can fit a slightly bigger one between the rear swingarm. I just cutout a carton board with the new battery dimensions (72V20Ah) so will try too fit it in the frame later. Otherwise working with RC lipo packs is also a sollution maybe? They are smaller I think.

 

[1DMF]

I found I could buy a sheet of steel from local DIY store and managed to create a bolt on plate that enabled me to install the 2KW motor no problem

I cut 3 plates, used the original motor bolts with some copper pluming joints (cut in half) to act as spacers.

The mod works fantastic, and enables me to install any vevor / kunray motor up to 72v 3kw

I've decided to only over-volt to 60v, trying to get @ 35AH battery custom made, with up to 70A BMS so I can upgrade controller at a later date and motor to 3kw if desired.

I'm hoping over-volting a 2kw 48v motor with 60v @ 35amp = 2,100w , but as it's a 48v motor is will spin at @5200RPM rather than 4300RPM making it nearer 3kw power output, that way I get a good range from the 35AH battery as well.

Dunno, it's all new to me and dealing with China is mind-numbing at times, with many horror stories and several dented wallets.

I'm also stunned at how expensive batteries are, even the cheap / dodgy ones, yeah, probably should have done more research before I started this pimp my eBike project, but hey ho, all part of the fun I guess, as long as I can get this to work without killing myself or my wallet :lol:

 

[1DMF]

I did the same as you as well with the old cardboard box to test

You will also see I moved the controller so it is now under the fake 'petrol tank' to give more room

 

[FreTurbo]

It looks like your bike has been buid differently. You motor is on the frame itself, mine has been build on the swingarm.

My frame also has less space for the battery, the cardbox I made for a 72V 20Ah battery, don't fit.

Also if I check the width of the motor i found, which is about 166mm in total.

I only have about 155mm. So i am afraid I cant find a suitable motor. Or i have to cut the back swingarmen and reweld it...

I think I will start with some larger gearing. If I can find the sprockets