I BROKE MY CRAZY 4KW EBIKE!!!

[@hhead56]

well done fix it i love the big bike great vid thanks.

[@hoverbotfpv1425]

I think I will put a Grin 1000w motor on the rear of my '49 Columbia bicycle board track racer next after Roadmaster hits 65kph. At 48kph now 2wd 1000w 48v. Your green lanes are like rabbit furrows.

[@daveyjones-sx6ym]

Man, that feeling when you realise you forgot heatshrink🤔 even worse once i was half asleep and stripped batt power cables at the same time. Grenade anyone? Launched that lipo out the shed quick.

[@andykirby]

😅brilliant!

[@sparkiekosten5902]

That made me chuckle!

[@yozerianets6309]

how about this one ? himiwaybike.com/

[@jimmurphy4703]

Fark!!!!!! 😂

[@jasonmiddleton2375]

Lmao celebrating new year's early? Lol

[@MAdrones]

You probably have a faulty brake sensor that disconnects the CA throttle. The brake sensor needs to be functional for the throttle on the CA to work. Good luck!

[@jasonmiddleton2375]

Hi Andy, great videos - can I ask what specs is your "big ebike" ? battery voltage, Ah, hub or mid drive motor (rated wattage), wheel size, frame size - thank you, it will be appreciated

[@HighVoltageKits]

Hey Andy. I'm pretty sure regen is possible with some mid drives as long as the chain is tensioned with horizontal dropouts and the clutch can reverse. Any other kind of tensioner like a derailleur wont work though. It would be a single speed bike as well. I'm guessing most people use hub motors for regen. Cool vid, enjoyed the problem solving you did.

[@andykirby]

Thanks, I’ve been watching some of your videos too, great stuff! Yeah I think you are right, regen would work if there wasn’t a freewheel, I’d love to convert this bike to have a pitbike style rear drivetrain, that would certainly make it stronger and solve a lot of problems for this high power stuff!

[@yozerianets6309]

how about this one ? himiwaybike.com/

[@poketfull]

andy, great vid! what type of rear mudguard do you use on the bike?

[@andykirby]

Thanks! That’s a mudhugger, it’s actually a small front one slightly modified to fit on the back (cut the sides off)

[@poketfull]

@@andykirby ah ok, i thought it may be a sitcomb one. yup i know the one you are on about. thanks for the response dude!

[@aidandubber7191]

Hi Andy I’ve got one of your KirbEbike 1500W-2000W Ebike kit inv ION-PLUS 58V 17Ah Battery-29 inch kits just wondering how I derestrict it

[@Laser2120]

You answered my question I was going to ask right at the end of the vid. Have you done any vids on regen charging ? Does it make much difference anyway ?

[@andykirby]

Haha, not done a specific video but yeah you can recoup a bit of energy but not as much as you’d think. It helps save the brake pads though!

[@a-aron2276]

In the city it can have a big difference, on a trip, it doesn't do a whole lot as you'd expect. You need to be wary though and know the charge limit's for your cells. Even more so when it's very cold.

[@jk-mm5to]

I hope those phaserunners are bulletproof. I will be using 2 powered by a 20s spim08hp cell pack rated at 200 amps. It should be fun. Thanks for the vids, keep up the good work and Merry Christmas!

[@erikyordanov7707]

Do u use torque arms for the wheel to stay in place Or what did you do so the wheel won't come off like my one

[@5005jez]

My set up on mountain bike frame. Hub motor -QS V3 3000w Hub motor 72v 4th Gen Sinewave controller -8000w 72v 100amp Sabvoton Controller with TFT display Battery -72v 60amp 20s6p 18ah battery assemblemed from brand new Samsung 30Q cells Getting crazy speeds on this set up. Although battery putting out nearly 90 not 72. In 4th setting on small thumb keypad it hit 62mph with more on rev to go but backed off as wet road . Dread think what lvl 5 where to hit full throttle ?! The torque is crazy. Great set up....prob not ideal for moutain bike lol.

[@user-ck6kq8zl2i]

Hi Andy, Im looking at getting a 1000w e bike (I'd like a 1500w really but vcant find any "off the peg" to buy") so I came across a few there is the Shengmilo one from Amazon for about 1600 which has fat tyres, but there is also this other one called the AKEX aluminium 1000W bike non folding, removable battery 48w, 1000$ (about 750 quid) from Ali Express - just wondered if you had come across them? Cheers...

[@3dkiller]

Ebike guru Andy

[@adrian.zyskowski2145]

Hi Andy little bit off Topic but the ebike conversion kits on your website the one that you put into a trek 1500w with 52v battery which I have ordered and I think they're great by the way but I wonder if the motor would take new controller with 72 volts battery or is the motor dedicated current up to 60 volts ?

[@herenow2895]

Where's this bike at at the moment Andy ? I'm well impressed with what what you've squeezed out of that Bafang motor. I had no idea that you could bring them up like that. The drag racing battery is a punchy bit of kit. Have you made a rigid box for it yet ?

[@andykirby]

Still rolling hard on that bike. There was an issue with the 72V battery that I still haven’t fixed yet but I mainly use 60V for the longer range.

[@herenow2895]

@@andykirby - I'd be very interested to see an update on this bike. I'm in the process of building a 72v battery with 18650's and any info on batteries that size is much appreciated. Especially troubleshooting. Those 21-700's are very interesting. Keep up the good work. Cheers

[@andykirby]

It’s a lot of cells, just be very careful, take your time and try and weed out any bad looking cells before putting them in a pack.

[@herenow2895]

@@andykirby - They're all new cells and at 3.5 or 3.51v. It's the BMS that seems a bit intimidating. But yes, I'll definitely take my time and triple check everything. Cheers..

[@philiprogers5772]

Is there much of a weight difference between the two bikes? And what do they weigh? As a comparison a Bultaco brinko is 39kg.

[@jimrodda]

Hi Andy, I have been looking at buying an e-bike nothing as nuts as yours ( I'm to old for that ) but someone told me the biggest motor has to be no more than 250w with a max speed of 15.1 mph, is this nonsense right? I wanted a 750w rear hub to get me around my village ( lot's of hill's ) thanks for the info you put out.

[@mayhem2423]

How long do your tyre threads last having to replace all the time

[@andykirby]

I’ve been riding every day on my Schwalbe Eddy Currents and they still have plenty of tread. Grip is amazing!

[@ShadowRifft]

Throttles with more wires🙈 been there twice, just got a different throttle but i'll see if i can find a wiring guide so maybe i can solder two together or leave one out🙈 Connectors and diagrams can be a pain, i wonder if they could all convert to a plug-n-play USB and seperate connectors for the battery, that'd be way easier👀

[@ebbstar]

Good to know that the phase runner can start up without a display and also has remote start capabilities.

[@Jimmeh_B]

The battery can't dump too much current into something. Current is drawn not pushed. I have blown the ever living 5hit out of many things though, by randomly connecting wires together.

[@jamiebhoy18888]

Well I’m away out now on my 11kw got 36ah to play with, can’t wait for decent weather to get out with the drone

[@DaVeHiLl200]

Good vid bro. Have you tried making a battery out of LiFiPo4 cells? Those have huge capacity, 20, 40, 60, 100Ah. I'm going to make a 48v 60Ah battery in the new year. Another question. The ebike kit I have is rated 48v 1000watt, would you happen to have an idea what the maximum voltage the esc will take without killing it? Cheers mate 🙂👍

[@kamaljitsingh1871]

bro, i like your every video .

[@robertlaurain3094]

Hey Andy, i have a question, maybe you can answer, ive been building e bikes for about 2 years now, and im in the process of building m y first stealth bomber( clone) My question is how can a n ebike be 5000 watts if the battery only puts out 2800 watts?...(72 volts 40 amh)

[@andykirby]

It’s the common mistake people make confusing watt hours with power output. Your battery is 2880Wh which is its energy rating not its power rating. To find it’s power rating you will need to know a little more about the battery construction (ie. 20S13P maybe) then you would need to know the type of cells used and the safe continuous max discharge per cell in Amps, then multiply the number of cells by the Amps and you’ll get the maximum amount of Amps the whole battery can in theory deliver, multiply that by the pack voltage (72v nominal) and that will be your max power in watts. Note though other things come in to play like pack construction and type of BMS used which can affect the max power. It gives you an idea but Whoever made the pack would be the best person to ask what the max power is!😁

[@robertlaurain3094]

@@andykirby i havent bought the new battery yet, thats why i thought id pick your brain b4 i did!..lol. im 53 yrs old but i cant help it, i like building bikes that are fast, thats what keeps my interest in it, now one more question, so far ive been building my own packs out of the lipo 6s packs with a 50 discharge rate, should i do that with this steslth bomber im building or is there another alternative that will give me as much power, that you can refer me too!! And i appreciate your response, i know you must be a busy guy so Thank you!!

[@andykirby]

Haha your hooked on fast ebikes now! I know the LiPo packs you mean, these are what most DIY ebikers start with (me included) because it’s easy to join packs up to get the voltage you want. They are also incredibly powerful, more so than any other batteries, which is why they are used for racing. LiPos don’t tend to have as long a lifespan as Lithium Ion cells though. remember that you still need a BMS to keep the Lipos in check and to prevent you from draining them too far, this kills them pretty quick. A BMS or balance charger is also essential especially if you want to charge the whole pack in one go... trust me it gets annoying disconnecting all the individual packs each time you want to charge.

[@robertlaurain3094]

@@andykirby Lol.. you got that right, about the life span of lipos! Ive had 4 fires with em, over the years, because b4 i got into ebikes, i was heavy into fast rc cars, for years!

[@robertlaurain3094]

Hey Andy, I finished the stealth bomber(clone) and now Im totally rebuilding, painting, and modifying a prodecotech outlaw that i picked up for cheap, my question is have you ever relaced a wheel, because i would like to put a 3inch wide rim on the back of this one and have never done it, but theres alot of variables, spoke size, length, where to get a rim that will work?.. if you have any info on it..would be appreciated? Thanx in advance!

[@jamesnightingale9782]

Very interesting Andy..what’s the all up cost of that mid drive bike..I’ve got one thats been running a couple of years now but it’s only 36volt 15ah battery. 250watt mid drive.bafang unit..it’s been good ive tweeked the firmware and removed the throttle .so it’s assisted only keeps me fit without killing me lol. But maybe it’s time for a new project..

[@danielgreen4213]

You could put a 36v 500w controller in the motor I have done this on 2 bikes easy swap fairly cheap and nice boost in power from 250w

[@II-yd6gx]

Hey Andy, Excellent stuff yet again, I love the way you just get stuck into it - “he who never made a mistake, never did anything!” - but I do hope you have some form of fire extinguishing equipment that works with the batteries? A 4kW motor in a mid drive, so what size chainring are you using, 60 tooth or more? Or is pedal assist disengaged? It might be cold in Blighty, but trust me you don’t want to be here in Aus with > 40deg C and bush fires everywhere ❄️ 🌪 🔥 🙏 💦

[@motormikemakropshop3137]

yes love me some upgrades lol so how much for a newby subscriber for your old screen unit ?i acknowledge the safty risk and aw the flaws its could cause

[@arkeyarkey9489]

How quick is it only joking. Is that frame the same as the big brands they all look the same

[@stevo8412]

Hi Andy, is your big bike road legal? I have a Chinese bomber 8000 W & love watching your channel! I’m just paranoid of going out on the roads just in case I get pulled and my bike gets took off me. How do you get round the law? :-) would be interested to find out. Cheers Steve

[@the.communist]

All you may get is a fine

[@yozerianets6309]

how about this one ? himiwaybike.com/

[@ahaveland]

Just look as though you're pedalling and don't do anything to attract attention or wind anyone up and I think you'll be ok.

[@danielgreen4213]

Make sure you keep pedaling be sesable and make sure you no what cars are around you best you can.

[@itroy3039]

Andy Are you planning on making Sarah's bike a ebike ?

[@patrickbonin137]

Andy.. Nice blog....now time to invest in a bike stand and stop doing your back in..or launching the e monster into Sarah's hen house...lol...hope you got the wallies with the fish and chips....time to make a full suspension fat bike mate and join the nutters club..lol

[@xpndblhero5170]

Not as broken as I expected but probably still a pain in the ass..... I just wish I could have a problem like that then that would mean I had a nice ebike, but I don't, Yet. LoL Good Job on the repair and reprogramming.... Keep it up and keep the videos coming. 😊👍🏻

[@colintemporal1791]

Hi Andy I have a 1500w hub motor with built in controller an a sw900 display my throttle not working it has a error 8 on display but can't find the problem any ideas

[@xpndblhero5170]

@@colintemporal1791 - Where'd you get it from¿?

[@colintemporal1791]

@@xpndblhero5170 got it off eBay it's a violamart 1500w hub with built in controller

[@xpndblhero5170]

@@colintemporal1791 - That was pretty much the only one I could find w/ a built in controller instead of a mid-drive.... Has it worked at all since you had it¿?

[@colintemporal1791]

@@xpndblhero5170 yes it used to work but it was a throttle I put together and it started playing up one time so I thought it was the soldering I did but have got two new throttles an they both don't seem to make a difference maybe something in the controller not sure as don't know alot about electronics

[@DaveSmithmoneymagnet]

Love me some fish & chips!

[@HolgerBeetz]

OMG....Andy....as much as I love your videos. This seems like a contest to me how to cut of connectors from expensive controllers simply because you have missed to order a few sets of 3/4/5/6-pin JST connectors from Ali for something like 1€ for a bundle of 20 each ? But well.....your stuff....go cutting of connectors and soldering directly to cables....

[@gursisingh1940]

Hello, I'd like to contact you to ask some informations, how can I? By email? Or I am just gonna ask here. I have a 2000w hub motor ebike and is brilliant but I wanted to make a mid drive, will be both for road and off road use and I like speed (the hub motor hits about 35 mph no problem) and the whole hub motor bike costed me about £1200. I would like to spend pretty much the same on a mid drive bike (I already have the bike and got it for 200 so budgets remaining= £1000) what would you suggest? I was looking at the bbshd but I dont think I can fit it in my budget...

[@MrMarkusmulder]

Thumbnail bummer, I mean... I hope you are doing well... Oo yeah I'm only 47 seconds into the vid. '' let's get cracking '' Good, encouraging cheese and thanks

[@happyhermit2022]

If you make it quicker, something or someone is going to die...amazing night lights. Also, there is lots of things I think about in bed, never ever, has it been about a V2 or yellow wires, although edging something up is likely. 🤣🤣🤣🤣

[@NJ-Tech]

dont break any more before i have a go! :P

[@andykirby]

I’ll try not to haha! Looking forward to it😁

[@zjzozn]

I used to use scissors for wire stripping. Now use CK wire strippers. Might have to send you some. Camera woman 👍

[@pavlossoultoukis4448]

This have happened to me before am using my second controller now everything fine this hapends because you overpowering the motore so yea. Next one won't last more than 3 months so i recommend dropping volts increase ah.

[@pavlossoultoukis4448]

Glad you dint burn the controller. Nice video.

[@warlockboyburns]

What is your top speed? Guessing 50mph

[@thunderbikesubc7557]

Hi Andy, Would you be interested in partnering with a University Design team that builds and races ebikes? We love your content and get a lot out of your videos.

[@HighVoltageKits]

ThunderBikes Design Team You guys could do an awesome KZbin series on such a project...

[@andykirby]

Sounds interesting drop me an email: [e-mail]

[@onederment]

Pleased u got it sorted

[@andrewgardner7104]

Sweet

[@Gadgetdad007]

You can buy my Moustache Samedi Race 9 on Gumtree

[@joblogs3538]

Gadgetdad ADVERT !! Your cheeky, hope you sell it 😉

[@informediatech-bruno5766]

use a android smart watch instead of a small phone

[@tekoppentekoppen761]

"broken".

[@natty5861]

Its an illegal E bike

[@dawnndell251]

Z

[@dogdipstick]

Baahahaha. "4Kw.." "crazy".. lol. My next goal is 40Kw peak and 20 Kw contin... under 125 lbs... thats crazy....

[@andykirby]

20Kw is very powerful, I have 15kW on a 80lb bike and it rips. 4KW On my sub 50lb bike with a gear ratio for torque feels just as much fun, it’s still crazy mainly because it’s so dangerous!

[@dogdipstick]

@@andykirby The lighter the bike is soooooo much the more the fun. 15Kw must be nuts.

[@andykirby]

dogdipstick yeah exactly! That’s where the fun is for me: power to weight! It’s crazy we can do this now!

[@MiguelAntonio-io4mv]

@@andykirby Exactly! If you speed up hard in top gear you can hit 50mph (at 72v 50a 3600w) it's a lot more efficient that a hub that you need at least 5000w to reach that speed.