Shunt Modding the Wired eBike

[@Altema22]

For those curious, the shunt mod takes two resistive connections that are meant to reduce strain on the controller components, and bridges them together to increase amperage. It's a common mod and usually safe, and the KT controllers are fine with it most of the time because their output transistors use the controller housing as a heatsink. The power increase is about 200 to 300 watts, but does not show on the display because the controller calibration does not account for the change 😉 The battery discharge current is controlled by the BMS (battery management system), and will limit how much power the controller can get. The exception of this is the BMS is mismatched, defective, or uses direct output which is unmanaged. If the battery or controller show signs of overheating, you can "undo" this mod using the soldering iron and solder wick, then bending the wires back apart if they are touching. Have fun!

[@CitizenCycle925]

Thank you, you are a wealth of knowledge! Always insightful comments 👍

[@notsoanonymous2458]

"The power increase is about 200 to 300 watts..." Is that relative to this bike, its battery voltage and controller amps or just in general? If I did this to my Emove Roadrunner, which is 48v with a front controller of 15 amps and rear controller of 20 amps would I still see 200-300 watts per controller? That would make a huge difference vs the Wired Freedom.

[@Werk4Cash]

What if a controller only has one bar instead of two?? My kugoo m4 controller only has one bar and appears to be missing the second bar from factory

[@r.vargas5410]

​@@Werk4Cashyou can still do it , I wrapped copper wire around mine and then soldered it , sounds like you have a 22 amp controller,I recently upgraded my controller to a 30 amp ,but haven't done the shunt mod , I feel it doesn't need it , it has plenty of power as it is .

[@Werk4Cash]

@@r.vargas5410 ahh gotcha!! I tried just putting some solder by itself on the single bar and it appeared a lot faster but forgot to unplug the battery before putting the controller back in its housing and it caused massive sparks and shorted out. Tried unplugging the battery and reconnecting it and the damn battery wires sparked so much they basically fused together and crumpled apart totally messed up my kugoo m4 pro :(

[@jasonkrantz8946]

Did it get hot from shunt mod

[@CallMeHarris]

WooHoo! Did this and it is absolutely quicker!! This is an A+ mod! Thank you for sharing

[@AhamedNaleef-h2s]

Hey did anything happened to ur scooter after the mod and did u get more top speed?

[@johnhecht5565]

Thank you for the great video. Shunt mods, dual motors, dual batteries. How fun is all that? Can’t wait for your next project.

[@CitizenCycle925]

Not sure what next project will be...

[@cowetareserve]

The pedal handshake was peak! Thanks for the dope suggestion, to those curious about the controller melting... A shunt mod on an e-bike involves adjusting the current measurement resistor (shunt resistor) in the controller to alter the amount of current that the controller reads and limits. If done properly, the mod won't destroy the controller for a few reasons: The controller is designed with a built-in current limit to protect its components. By modifying the shunt resistor, you're changing the current sense feedback, but as long as you stay within the controller's maximum rated limits, it will continue to function safely. If the shunt mod is done carefully, the increased current draw will be within the limits that the controller can handle. This ensures that components do not exceed their thermal or electrical limits, avoiding damage. E-bike controllers often have built-in mechanisms to handle excess heat and prevent overheating. As long as the increased current doesn’t cause excessive heat or stress beyond what the cooling system can handle, the controller should remain safe. Controllers are generally designed to handle a range of operating conditions. As long as the modifications don’t push the controller beyond its design specifications, it should work correctly without damage. It’s crucial to understand the risks and ensure the mod is done by someone knowledgeable. Excessive modifications or improper adjustments can lead to overheating or failure, so it's essential to proceed with caution and always remember.... Its your autism; you get to pick the special interest!

[@ScottVerSluis-j7v]

My own experience on my shubt modded 2024 Wired Bike: seemed to pickup a few watts in lower pedal assist. For instance Pedal assist 1 used to be about 230 watts now its 250. I had a hard time riding under 18 mph in pedal assist 1 now. Bike just seemed to have a bit more juice on the same setting. Off the line power a little more snappy, the top end I hit 41.6 peddling with full throttle on flat with no wind so maybe 1 mph gain or so on the top end. Based on this a worthy mod and its probably not going to affect any reliabilty

[@CONSCIOUS_TALK_ENT.]

That may make the battery terminal overheat if you feed it more power. My battery started melting the inside terminal and I didn't even do a shunt mod.

[@Dorothy-j6y]

Thanks for the videos! Gained 2mph and a bit more torque 😉

[@eRide_Addiction]

Awesome video. I just added some Max Epc potting compound to my controller and I feel zero heat. The bike is even quicker than it already was! I have done about 1k miles since doing the shunt mod with zero issues. Unfortunately, a lot of these commenters have no idea what they're talking about and are giving bad advice to your viewers.

[@IMBruceECLECTIC]

Great video! Loved it!!

[@duanehundley]

If you change the controller can you run a 72V battery for your front motor kit? More Volts=more MPH

[@CitizenCycle925]

I would not, it's a 52v motor so 72v is probably too much juice

[@MarkSmith-js2pu]

That was some thrilling footage!

[@petemiddleton64]

Wonder if good fan will work to cool it

[@JustKeepLivingFPV]

Nice content man, fun looking bike.

[@LuisCao-i6r]

The LCD is not working, so how can I fix it?

[@IMBruceECLECTIC]

Great job! What's up with the bike laying down at your starting line...?

[@CitizenCycle925]

Not idea, it's been there for like 3 days.

[@IMBruceECLECTIC]

@@CitizenCycle925 ...that means you live in a nice, crime free area. :) I am going to try the shunt mod on my GOAT bike....You made it look easy. Do you think "liquid solder" would work?

[@SCIFIBRITHEVIDEOGUY]

Can I do this to my area 13 controller for rad rover 5 upgrade?

[@CitizenCycle925]

Yes, I did mine. That's what is on the rear of my Citizen bike.

[@SCIFIBRITHEVIDEOGUY]

@CitizenCycle925 ok. I haven't upgraded the motor yet. Do you think it's OK with the 500w Motor?

[@boblaturner7427]

Hi Citizen, I really like your videos... This first I've heard about something like this, what is it actually changing in the controller? Also, can this shunt mod be done to controllers in other bikes? Thanks.

[@CitizenCycle925]

Yes can be done to other bikes with KT controllers, I may do to my grizzly controllers too, I think they are KT. If you read Altema22 comment he explains better than me 😁

[@MarvstubeSoontv]

How do you determine your controller type I have a Amyet s8 48v and considering doing this to my bike

[@andrewford9974]

Fun. Until the bike stops working because the mosfets in the controller overheat and melt

[@markmannm2]

Indeed!

[@rafaeltrejo1614]

Exactly. I burnt my controller.

[@Ebikepowerlevel5]

I know this is off the subject but I got a e mail about a bigger battery with your kit and I was curious as to how much bigger the 20 amp hour was over the 15 amp I wanted to make sure it will fit in the bag with your controller

[@CitizenCycle925]

20ah is 180mm x 170mm x 75mm and 10lbs, the 15ah is 180mmx 150mm x 75mm and 7.5lbs.

[@blazblue831]

Can I install a dobble crown fork from e-cells five star e-bike to my wired freedom 2024?

[@busterbadass]

Ecells uses a tapered head tube, it looks like wired does not. I think you can do it with some sort of adapter

[@leviboyton1707]

Would this work I’m running 52v battery 23a and a 48v controller

[@rayrutherford74]

I have a 48v 1500w peak bike. The stock battery is 48v 11.6ah and i installed a dual battery balancer with a 20ah 2nd battery. Will the dual battery system help any gains with the solder mod ? Also will it help with not overheating a battery since the balancer is supposed to balance power?

[@CitizenCycle925]

the solder mod will pull more power from the battery so having 2 batteries should help, it will probably have less voltage sag. My guess would be that having more capacity to pull from would also help keep them cooler

[@rayrutherford74]

​@CitizenCycle925 OK that's kinda what I figured. I was going to wait to have another controller on standby just incase it 🔥 up but I think I'm going to do it this weekend. If and when I do I will report here.

[@lostguy2025]

What about shunt modding the NEW 45 amp controler? (on the 2nd 2024 model)?

[@BikeCamUncut]

hi sir i have a himo z20 250w can i boost this bike? cheers

[@Bustadhed]

As always thanks for all your valuable input on everything especially "Wired" ! I don't know if you truly realize how influential your bike reviews and testing are to us who live in an ebike desert ! All because of your reviews I've bought my ebikes , first one was a Hiiwiway cruiser (I loved) I owned it until I realized that it accelerated way too slow to run with traffic . Here in Indiana cars will just run you over or off the road while they curse at you(f____ing idiots). I was really excited with your review of the wired freedom and it's top speed so I bought the late 2023 model and really wish I would have waited a few months for the 2024 model because I can't take advantage of the mid suspension , it will rub against my controller box so I have to extend it all the way out to avoid this . I have plans on buying the new model that way I will have spare parts and battery if needed . You are truly "De Man" 🏆on all things ebike related , keep up the fantastic work !

[@CitizenCycle925]

Glad to hear you are enjoying my channel! FYI If you buy a new wired the batteries are not interchangeable. They change the connection port.

[@avonstellar4475]

Can you review the new ecells five star bike? I heard it's on par with the wired freedom

[@TurntDreeze]

Can you purchase the screen for any bike?

[@bobbybecker80]

I'm surprised the controller is encased in a plastic box as that inhibits cooling (IMO).

[@mikey3239]

i was thinking the same thing i drilled several holes in my box dont know if it will work

[@indogyrsimdead]

Just paint the controller black and Zip tie it to the frame

[@kuntekinte2687]

wouldn't that allow water and god knows inside and destroy the whole.thing?

[@kuntekinte2687]

​@@mikey3239wat will protect from water if U have holes in it?

[@LeeAyzahn]

the hand shake with the pedal 🤣

[@CitizenCycle925]

Haha, you caught that 😃

[@Sherman1862]

Wonder if the battery will drain faster and can I connect the wires with wire instead of Sodder?

[@Sherman1862]

Thank you.. : )

[@CitizenCycle925]

i've never tried wire, not sure if that would work. yes, will definitely drain battery faster.

[@kdscrapping4452]

Have you seen the UBCO 2x2 ?? Any thoughts ??

[@FoundingYouTuber-2005]

In my best Colonel Kurtz voice (Apocalypse Now): "the power . . . the power . . . the power"

[@mrodriguezangel1]

Jesus lol I woke up to your comment def doing this today and thinking of that line or yell it riding in the city here😂

[@ScottVerSluis-j7v]

Did you notice any wattage max difference on the screen that you could read vs stock?

[@CitizenCycle925]

No, you will not see it reflected on the display watt meter.

[@shanepipkin4041]

what brand is the controller?

[@CitizenCycle925]

@@shanepipkin4041 KT

[@shanepipkin4041]

@CitizenCycle925 I emailed you if you have a web page on the 45 amp working on the 60 volts?

[@huntersawyer9337]

Do you know if the shunt mod be the same on the Hovsco ?

[@papablueshirt]

We always want a little more don't we? 😜

[@CitizenCycle925]

Always!

[@davidgraham2673]

YES

[@indogyrsimdead]

The only problem I see in doing this Is how does it affect the range? more power usually means less range

[@cornishrc4084]

Can I do this with a fildo m1 pro thanks

[@rustymeyers1]

Can I do this on my rad rover plus?

[@anio6865]

So, if I use rosin core wire, I do not need to apply flux beforehand, correct ? And I do not need to heat up the shunt correct ?

[@l3arney]

How's the shunt mod doing now? Has it fried anything in the controller yet?

[@CitizenCycle925]

still working fine!

[@JustKeepLivingFPV]

Shut mod only changes so much, to really push esc, E-Bikes you would have to change gearing, use higher output batteries but just shunt modding the controller and regular riding should be fine, motor can handle it, esc usually a good brand can handle a little more.

[@snapshotprophotobooth1864]

I ordered the motor kit about 1 1/2 weeks ago whats your turn around for orders. also can this shunt mod can be undone if we don't like. just desolder?

[@CitizenCycle925]

Kits are still being manufactured, I anticipate shipping out to customers in May. Yes, You could undo the shunt by desoldering.

[@jeffmartin7227]

Does this work on the current dual battery Wired bikes?

[@CitizenCycle925]

it does not, they started using a different controller

[@SciD1]

I have no idea what you did in that controller. But didn't look like worth the risk of messing up the controller.

[@johns5504]

My bet is this is next to impossible in a fully insulated controller ?

[@CitizenCycle925]

Correct, can't really do this to lishi controllers.

[@jeremywheeler2122]

Wait a sec? What was that front motor kit mod?

[@ringss12]

Will this work on an August 2023 cruiser also?

[@CitizenCycle925]

Yes

[@ringss12]

@@CitizenCycle925 thank you

[@tylermckie5322]

How much is a new controller if you break it??

[@CitizenCycle925]

$139

[@jwillwork3683]

Can you do this with aventon Aventure ?

[@pensbyrob]

How much is your front hub motor for the Aventon adventure 2?

[@CitizenCycle925]

$899 for complete kit (motor,controller,wiring harness, display, throttle, battery, charger )

[@pensbyrob]

Thanks I will be in touch in the near future.

[@Ts68mo]

How much did that bike cost you ?

[@edlyli7166]

Does it work with other e bike

[@keithpegg7825]

Thanks, the mod was fun and would like to read more. how about a higher output controller? I do know that CA Cycle Analyst have done some testing with e-bikes power, my first build 9 years ago was with CA and a 1000 watt drive had a lot of fun and 16,000 miles. sold it last year. Have a new bike now lower watts but just as fun. 75 years old and enjoying life.

[@rvboondocker2559]

For the algorithm and THANK YOU

[@CitizenCycle925]

Haha thank you!!

[@rvboondocker2559]

@@CitizenCycle925 I think you need to make a video setting the passcode.

[@mikelee1535]

It would be more insightful had you clocked before the mod, then clock it again after to get an accurate comparison. Also, all the YT videos of the WIRED Freedom speed runs never show or mention whether they are pedaling to assist (increase speed) when reaching these 40+ mph figures. Could you explain how the mod change in the Ctlr circuit is furnishing more power? How did you discover which wires to alter? Also, it would be a good idea to measure (and monitor) any increase in the temperature inside the Ctlr since more power is likely inducing more load on circuit. I would be reluctant to try this mod without first consulting a seasoned electrical engineer who is familiar with this particular circuit. I have had many encounters with Chinese manufacturers over the years, and I am very leary of Chinese electrical/electronic circuitry. They are notorious for using under-rated gauge wires in their electronic devices that tend to over-heat. The majority of the Chinese wire sold on Amazon don't have the gauge, voltage, amp ratings printed on the insulation, that are required in the U.S. I could on and on with specific examples. but nobody really cares about such things anymore.

[@JoshuaBrown-q6q]

Bro pls help with aventon adventure speed faster than 30 or how to remove limiter I can't find anything

[@rayrutherford74]

Need more volts from what I'm told. 30mph is pretty much max for 48v

[@Ekamwitu]

does this breack the bike or over rule any warrantys?

[@CitizenCycle925]

Absolutely voids the warranty

[@Ekamwitu]

@@CitizenCycle925 oh then ill just do it after the warranty ends

[@VMH721]

Unbelievable, ORDERING TODAY

[@CitizenCycle925]

Awesome!

[@BigEightiesNewWave]

The placebo effect is strong on this one.

[@benhartland4708]

then he must've built a time machine because it went back in time over a full second

[@johnnylong2049]

Do a shunt mod on the Emma 3.0 please.

[@EricBryant-l1y]

I'm also considering buying the front motor kit from you for my wired freedom ebike l believe it would make a already great ebike a totally ultimate ebike to have the warp drive kit

[@CitizenCycle925]

@EricBryant-l1y yes the front motor kit takes it to a whole new level. Once you get accustomed to the wired power, then you can add the kit and it feels like a whole new bike

[@EricBryant-l1y]

@CitizenCycle925 if l order one how long for delivery

[@CitizenCycle925]

@EricBryant-l1y they're still being manufactured so right now I'm anticipating early October delivery to customers

[@EricBryant-l1y]

I just received my 2024 wired freedom ebike do you think if l do the shunt mod it would be ok .l mean is the one's that's already did the mod having any issues. Im really wanting to do this mod if you think the 2024 wired freedom controller can handle the extra . I know it voids warranty . Id do it at my own risk lm just asking if i do this simple mod do you think my ld be okay.

[@CitizenCycle925]

@EricBryant-l1y unfortunately you can't shunt mod the new controllers. they are made by a different manufacturer and they are filled with gel

[@chuckas57]

Another Great Video

[@thehighriseconstructionob9679]

Thank you video sir very interesting Where did you connected you said hear where is hear please send me skimatic please

[@blueCollarGuy]

Your next video should be a dual motor shunt mod. Need to see that video. Show a temperature reading as well.

[@daleloch1089]

Poor 5 Star and their potted controller! No Shunt Mods for You!

[@johns5504]

Thats exactly what I was thinking

[@quantumfx2677]

Yes, can easily be done on the 5 Star however it voids the warranty. It increases the power the controller provides to the motors and also causes a lot of heat because the controller is not designed to handle that much power

[@Goesriding]

Good job. A lil chintsy on that solder tho lol

[@DrRevKing]

Good demonstrative video, Brian. But me and my 2024 Wired Freedom's warranty are going to have an excellent long-term and lasting relationship without it. 😂 Plus, your front wheel ROCKET kit is all this Flash Gordon-era fan needs to "CONTROLLABLY" blast off to exfil or infil True Believers out of Harms Way for what God may allow. Thank you ! 😊

[@CitizenCycle925]

Yes this definitely voids the warranty, glad you are excited for the kit, can't wait to get them out!!!

[@DrRevKing]

👍

[@senseipat8439]

Or you could just buy a new controller that has more watts. Just make sure it has the same voltage as the battery, thats much safer than using that method.

[@Lucar30260]

regarder bien que votre BMS de votre batterie supporte bien autant d'ampérages, car votre batterie va user plus vite (moins de vie) et votre contrôleur chauffe plus, ce bricolage fonctionne bien cela donne plus de nervosité au démarrage mais votre vélo ira pas plus vite en vitesse de pointe.

[@namenotshown9277]

You have to monitor how hot the mosfets get with the mod, you dont want them getting too hot for too long, if you heavily mod the shunt you might need different mosfets and upgrade the busbars or solder tracks from fets. Surprised you didn't check the heat of the controller at all, you just have to put your hand on it.

[@maxhughes5687]

Great. Get ebikes outlawed in my home town.

[@maxhughes5687]

@@busterbadass Fed Law defines ebikes' People will lump them all together and say they are to fast and should be subject to moyor vehicle laws. Do you want to pay a fine for no tag, no turn signals, no brake light, no side ,markers.....LESS THAN 750watts is an ebike and no tag required.

[@mikey3239]

dont think this is good for the controller long term ,

[@CitizenCycle925]

Definitely voids warranty, I've done it to other controllers and they have been fine but it's running more power than designed for.

[@kjm-ch7jc]

With that voice you must paint in your spare time.

[@kevinmills5293]

Great way to start a fire.

[@Mike6string]

The five star from e cells just took 75% of wired’s business 🤣

[@jpmyles1560]

I want to make my Xclass 52volt faster

[@BigEightiesNewWave]

Needs a soldering lesson. The idea is to heat the wires, that are going to have solder pushed into the heated wires, so it flows into the wires. This is so cringe.😂 His is literally dripping melted solder onto room temp. wires, then a big blob, lands on the PCB

[@ollieox9181]

You really should add the caveat (or, maybe you did but I missed it) that modifying a bike this way might void your warranty. Also, a lot of states/provinces have speed limits on ebikes in public areas. So, anybody looking to do this modification, be aware.

[@rafaeltrejo1614]

Moder controller are sealed with epoxy !!!

[@shawnchambers3416]

WARRANTY = GONE

[@busterbadass]

people who do these types of mods don't care about the warranty

[@djdocbear5603]

So far my is going slower

[@markcozzie]

Not possible carrera ebike 100%

[@josephcox2201]

People please do not do this Don't do what this dummy just did This is a good way Catch fire on the bike And the battery can explode

[@rafaeltrejo1614]

I learn this 4 years ago. Fry my controller. No thanks.

[@ghoul114]

ECELLS