Uprading my 20" fat tyre Ebike -500w to 750w - PART 1

[@dittshei]

*Great **Latest.Bike** . I upgraded the pedals, added fenders and installed a handle bar extension to raise them. Now it’s a pumped out E-Bike. I love it.*

[@-Ryans]

10:14 If you don’t fancy taking a Hammer near these small usually Loctite done screws. Get the Exact size & before you try lookin it, give it a slight “NIP” as if your TIGHTENING it & that’ll snap any Loctite (or heat!) sealed screws, Works every time 👍🏼👍🏼

[@stephenchapman166]

great video would a 1000w motor fit in 750w casing thanks

[@linqking5461]

Quote a good item you did put in the spotlight: the noise of them bearings. Thanks, chief mechanic!!!

[@utubeape]

Thanks for showing us your project, I want to do the same thing on a slightly different bike, but my controller box is very small, I doubt I can get a more powerful controller to go inside. I hate the controller box being at the base of the battery, obviously there have to be holes for the cables to go in, but that means water gets in too. Thats maybe not a problem for you down under but I am in the UK! Already had to replace the controller due to muddy water damage.

[@joc1862]

I know the problem. Larger controller box can be placed elsewhere on the bike but it makes the bike look untidy. Choose between more power or looks.....

[@utubeape]

@@joc1862 do you think it would work to move a rear hub motor to the front wheel, after removing the cassette holder and sawing down the axle, because I want to upgrade my 500 to 750 like you and will have spare controller and motor left over. I would only have to get new shorter spokes and another throttle

[@joc1862]

@@utubeape Not quite sure what you mean. Do you want a motor in each wheel? If so, it can be done but it's messy - 2 motors, 2 controllers, 2 throttles or better, I throttle linked to both controllers - what about pedal assist? Do you have enough room on the bike?

[@utubeape]

@@joc1862 thanks for the reply, I already have a fat tire ebike but want to improve it, the rear has the 500w motor, its controller is under the battery which is behind a seat post. To upgrade the back motor to a 750 I need to fit a new controller anyway to somehere else on the bike, I have room. I want 2 throttles so I can only use the additional front motor when needed, because it will have a smaller battery., maybe 10 Ah. Already got pedal assist mounted. I just wondered if you have ever tried to fit a rear wheel motor onto a front wheel, having taken off the cassette and sawing down the threaded bar / axle

[@joc1862]

@@utubeape No, haven't tried that. Cutting up the motor would be a messy job. You would need to check the position of the bearings on the cassette side to see if the altered motor would fit between the front dropouts. Also torque arms would be required for the front forks. I'd sell the 500w motor and controller and put the money towards a ready-made 500w front wheel fat tire kit and buy a bigger controller for the 750.

[@ManMan-b5y5c]

Hello does anyone know if I change just the motor out of a Bafang rear hub motor cassette,could I just slot the motor into a freewheel casing.

[@tasd5673]

I have a 36v 250w Fat wheel bike and pulled hub of was rusty a making noise I cleaned it with sand paper and contact cleaner but it’s throwing an e8 code ? Any ideas

[@joc1862]

Sounds like an electrical problem. Check for wiring damage. Maybe your sanding rubbed some of the insulation away and is shorting???

[@tasd5673]

@@joc1862 I will check thank you

[@ManMan-b5y5c]

Could you give the model of controller you have in this set up even maybe a link to where you bought it.

[@joc1862]

Sorry, bike sold some time ago. Can't remember. Got it as a 25/30 amp controller on ebay..

[@ManMan-b5y5c]

@@joc1862 hi thanks for the reply one more question could I use a 48v 21ah battery with a 750watt bafang rear hub motor with a KT CONTROLLER 22a

[@joc1862]

You can - with difficulty. Battery is fine but wiring on the controller needs to be worked out - namely the wiring for the display. Or else run it without the display, which is OK.

[@ManMan-b5y5c]

@@joc1862 wow thanks for the speedy response well I have an LCD 8 display connected to a KT controller,but I don't understand what you mean about the wires to display. If I run a KT controller 22a with the 750watt motor I guess I'm good to go or am I missing something.

[@joc1862]

I assumed your controller didn't come with a display, which makes things difficult. Since it does, ignore the previous post. All should be good.

[@tonystone3397]

Great vid thanks for sharing.

[@gustavodelux]

cambiaste el motor y toda la electronica y los controles no tenÌas que cambiar? y con eso tienes mas potencia y mas velocidad? me gustaría hacer lo mismo, pero tambien me gustaría saber más sobre las ventajas y desventajas, si es que las hay. saludos gustavo.

[@joc1862]

Sí, también tienes que cambiar el controlador y la pantalla. Sube colinas mucho mejor.

[@CHARLIE1955able]

I have a error code 36 backing down the hill the axle rotated and I think it no I can't get power to the wheel. 10 inch lead 45 pin is it replaceable question mark

[@colinwhite144]

It would have been better to buy the wheel 1000wat 32amp controller either battery that came with bike 48v20amp or you can get 52v 20amp 35to37mph with regent braking on controller under £300 worth it or 28amp controller and solder shunt bars

[@gustavodelux]

y donde las puedo comprar, puedes pasarme un link te lo agradesco saludos gu.

[@joc1862]

Busque 'Bafang' en eBay...

[@AD8313]

And you are extremal!!! 👍👍👍 I also want to make an electric bike with a drive and on two wheels. It works great in the woods.

[@joc1862]

Yes, great. You just have to watch out for punctures.

[@AD8313]

@@joc1862 there is a camera with puncture protection. www.ebay.com/itm/Tannus-Armour-Puncture-Pinch-Protection-insert-Mountain-Bike-MTB-Bicycle-29/372735657006?_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D1%26asc%3D225085%26meid%3Dea96f4fcbd394dff8dbec3a37ce92bcb%26pid%3D100005%26rk%3D1%26rkt%3D12%26mehot%3Dlo%26sd%3D333505420766%26itm%3D372735657006%26pmt%3D0%26noa%3D1%26pg%3D2047675&_trksid=p2047675.c100005.m1851

[@jonvickerson7694]

Great video…..well made……

[@bryanault5638]

How can I make my 48v 750w fat tire bike have a 52v battery and no speed limit

[@joc1862]

Hmmm... not easy. I did it (52V) with another battery as I didn't want to tamper with my existing battery... see my video kzbin.info/www/bejne/jae0go2Pgcl_fK8. As for speed limit... some bikes allow max speed to be changed via the advanced menu settings on the display. Others are speed limited via the controller, making it difficult without replacing controller. Good luck.

[@gauravjoshi9183]

Can you please share the spoke size?

[@joc1862]

For my 20" fat wheels, spokes are 130mm long - but this depends on motor size. Yours might be different.

[@mickpurcell272]

Good job👍👍

[@Sam___Sky]

hi my Bafang RM G060.750.DC 750w rear hum motor planetary gear broke down, I can't find the exact size of them do you know what is the size of the planetary gears inside of the bafang 750w ? diameter thickness and number of teeth?

[@RicSil69]

Hi what oil would you use for the gears. Many thansk

[@joc1862]

Gears are plastic. Use synthetic based grease not mineral based, eg - Mobil 28 or similar.

[@RicSil69]

Hi thanks for replying. My hub motor has 2 holes. 1 to put oil in and 1 to drain. Its only a small amounf of 35ml.

[@joc1862]

@@RicSil69 Oh, ok. I've heard of that being done. Don't know what motor you have - if I did that to mine, I may get oil in the electronics.. Must be ok if it works for you.

[@RicSil69]

@@joc1862 . Its a rich bit motor 350w geared rear hub

[@RicSil69]

For a 26inc fat tyre

[@mrspeedofficialyoutube]

Hey nice video👋 I have same motor and risunmotor 45a controller. I test bike with 36v battery and it run only 25kmh. I remove speed limit but I dont know why bike not go faster. Also I dont have instructions to make pedal assist work ok. Only assist 4 & 5 works another ones real weak. Bike accelrate real fast to max speed but it so Slow. I dont know does I get more speed with 48v Samsung cell battery. Its in first charge now. Is there in motor internal speed limit? In Risun motor display I dont have advanced menu where normally 750c display is also advanced menu where can change speed limit of. So I need to remove it from controller with Bluetooth or PC. Can anyone tell me what I must to do get more speed. Display shows wattages when test ride 500-1400.

[@joc1862]

Motor does not have internal speed limit. Mine is also slow with 36v. I use 48 or 52v battery and it goes very well. Try higher voltage battery.

[@mrspeedofficialyoutube]

@@joc1862 Thank's lot friend. You was right, now I have 48v battery now goes 40 kmh. ✌️

[@joc1862]

@@mrspeedofficialyoutube That's good. Glad to help.

[@racerx2095]

Good job 👍👍😁

[@milordas]

nice fenders :)

[@KevinSmith-jp3vn]

Excellent video ! Thank you so much !

[@joc1862]

Hope it helps....Thanks

[@khronin]

Hope you respond.Did you ever think of just adding a front hub motor--I have a 20 inch CSC coming and was thinking of just adding another motor similiar to how a grizzly is--and another battery.They got 1000 watt front hub motor kits that are reasonable and have excellent reviews and the few folks that have done this have ebikes that literally fly up the steepest hills with little to no effort.I mean the motors are probably using maybe 40% of their power if that--so everything should last longer--plus a 1000 watt alone can climb hills--added to my 750==I just want something that can go offroad and have the range to go 40 miles plus on throttle only if need be.

[@joc1862]

Yes, I had thought of that. Problem with that for me was that the bike would get too heavy with the extra motor and battery - and I have no space on it, especially if I ran dual controllers as well. The other thing was that I wanted to get at least a bit of excercise while riding the thing. As it is, the 750w (geared hub) with a beefier controller climbs hills easily, with little effort on my part. I didn't want another motorbike as I already have one of those. Also, with so much gear on the bike, it's more conspicuous if you ride on main roads and more likely to be stopped by traffic police for illegal riding. As in my case, I've got to ride on main roads for a couple of ks to get to an offroad park....Once there though - great!

[@khronin]

@@joc1862 Hey man thanks for the reply.I do hope the 750 I am getting is strong enough and I also plan on peddling probably more then 50%.I just want it to last and to have good range.

[@joc1862]

@@khronin Check the type of 750w hub motor you're getting. If it's geared, you'll get lots of torque for hill climbing and lower top speed. If it's direct drive, you get less hill climbing ability but higher speed on flat roads. You would probably need a 1500w hub motor (which gets heavy) if you want to climb hills with a direct drive. Depends where you ride. For offroad, torque is probably best.

[@khronin]

@@joc1862 It is geared hub bafang and that it is a real bafang 750 so it has 1000 watts or so for uphill. I do not need the ability yet--but I plan on going up to helen GA after the summer to take it on some more difficult trails--i should have a good feeling if it can handle it by then.I was going to get a grizzly but did not want a moped style fixed seat ebike--i have a 20 inch BMX and have ordered a comfort seat because I do plan on peddling.I gave up moutainbiking a few years ago because i llive near 2 hills to get to my house--not big ones--just long and it was miserable to have to deal with them after being worn out from biking.I am more worried about the trail riding in a few months--it takes a lot more energy to ride on trails then pavement.

[@joc1862]

@@khronin Good.... sounds like you know what your doing... enjoy you future rides.

[@DanielLopes-jt8yl]

You will need to put a larger controller to see benefit from the new motor. Motors will behave the same as controller will send same amps to each. The lager magnet is battery strength. Meaning it will handle heat better (heat build up slows the motor and can burn it out). I’m not an electrical engineer but I guess there is a larger capacity overall. Still the motor should only respond to the power being sent to it by the controller. 25amp is good but new motor can handle 35amps (short time be for heat builds) best at 30amps. Let me know if theory plays to practice as I am going to do this to my RadMini but with Bolton Bikes (check his upgrade on UTube) tutorial and motor 750watt/controller 35amp/color monitor- upgrade sell. Also see ERI Denver ant Electricbike both on line (USA). Good video it helps in respects thanks!

[@petergarthwaite1938]

I just did the swap on my Rad rover 5, first run out lasted about 14 miles before battery cut out and for some reason the motor was really freaking hot. Too hot I think. I wasn’t surprised the battery wouldn’t last as long but I was shocked that this bigger motor got so hot. I previously rode it with just the motor controller upgrade on the original motor with no overheating.

[@joelthomson1]

That's what I thought otherwise it's just a 500

[@john-martin]

Do you know of a 750w motor that will work for the RadRunner single speed??

[@markj6984]

did u have to upgrade the wiring harness? im looking to do what your doing and i have a smaller quick connect as my bike has the 500 watt.

[@joc1862]

Yes, had to change to a larger controller (and display) to power the 750W motor.

[@chiillytv8577]

does this rear motor fits on the super73 bikes ?

[@Crosshatch1212]

Yes , I just done one , brilliant ,

[@fraserthomson5766]

@@Crosshatch1212 Did you upgrade the controller to one with more amps or use stock?

[@Bimmer-Fonz]

I have a 350watt bike and i want to put a 500w motor in it. Can i just get the motor and swap it in or do i need a new controller too?

[@joc1862]

Sorry, not sure if the 350 & 500 are interchangeable. If you swap to a bigger motor, yes, you usually need a larger capacity controller. It will run with the original one, but you won't get the power advantage.

[@Bimmer-Fonz]

@@joc1862 thats what i thought, thank you!

[@yamasaki.design]

Hey Jo, I have the Bafang 250W 36V setup on a 20" fat tyre commuter and I want to ditch the pedal assist for a twist throttle for better control. the manufacturer was most unhelpful and wouldn't give me any data , wiring diagrams or controller assess codes for the motor controller. what i'm wondering is... do you know of a controller that i can use to allow straight forward connection to the Bafang motor. i dont even really need a dash, although it would be useful for battery life monitoring, charging ect. any help would be great. cheers Paul

[@joc1862]

Hmm... you need to check your controller to see if there is spare wiring coming out of it that is not being used (a 3 wire connector with black, red, green or white wires). If so, that is the usual throttle wiring that the manufacturer may not have used (because a throttle can be road illegal) and an aftermarkek throttle may be added to it. If not, the controller may be specifically designed for your bike without a throttle connection. If you can live without a display, most cheap Chinese controllers (of the right V and ah) will come with throttle connection, but you need to get a compatible throttle with it. Matching things up with an odd controller (display, throttle, PAS) can be a problem. Stick to your pedal assist - I personally prefer it to the throttle and your battery lasts much longer.

[@RandallBalls]

@@joc1862 my sondors fold X died. I'm looking to get a replacement motor. I have a 48 volt 500 watt motor. Can I just drop in a 48 volt 750 watt motor or will I need a new controller?

[@joc1862]

@@RandallBalls If it's the same 500w geared Bafang motor as my Addmotor bike, yes, you can drop in the 750w version - but the existing controller, if it's like mine, a 17A one, doesn't supply a 750w with enough power. I swapped to a larger 25/30 amp controller to get proper performance out of it.

[@jbar3337]

I got a couple questions can I buy a afang 750 watt 190 mm dropout throw it in a 500 watt 190 mm Dropout bafang housing stator motor. It looks like that's what you've done.

[@joc1862]

My bike has 175mm dropouts. The motor would probably fit 190 if you add spacers. Yes, the 750W stator fits the same housing as the 500W.

[@jbar3337]

@@joc1862 FYI I did have a hall motor sensor failure on that 500w when I pulled the sensor there are no markings on it this is just information in case you have a hall sensor issue you would want to order the SS 41 following numbers are digits relate to the length out the leads off the circuit and you would want bipolar

[@joc1862]

@@jbar3337 Thanks for that... Luckily, haven't had any problems with hall sensors yet...

[@nicololeoci8165]

Monta anche su un cerchio da 250w il 750w ?

[@joc1862]

No, non credo. Si possono cambiare solo i 500w.

[@MrCheerbo]

Good stuff

[@accidental_relevance]

Can I use a 750W motor with my 24V 10AH 18Amp discharge bottle battery? I'd also like a silver version of the the rear hub motor since my Schwinn OCC chopper bike is the chrome version.

[@joc1862]

Hmmm... The 750W motor I used was the Bafang geared motor and it will run on various voltages - but that is determined by your controller. It is generally used with a 48v battery system and the controller will cut power to the motor if the voltage gets below about 40v, to protect the battery (lithium). With an appropriate controller, it will run on that voltage - but very poorly. It will lack power since you're feeding it with 240W, which defeats the purpose of using a 750W motor.

[@accidental_relevance]

@@joc1862 so with this battery is anythin over a 250W motor a waste then ?

[@wavemaker54]

Who needs brakes anyways? Surely they were the second best cycling invention. A pair of Hokas would last a whole summer, unless you lived in the mountainous areas, as brakes. Just like my old converse did with less dense more abundant materials taking their place. We find things by looking.

[@PG-qm5nk]

do you know if you can remove the speed limiter by leaving to the white wire off? i have the bafang 250w hub motor...

[@joc1862]

Not familiar with the 250, but if wiring's the same as the 500 and 750, the thin white wire coming from the hub motor is the speed sensor wire. Disconnect that and you lose your speed readout on the display. Nothing to do with speed limiting as far as I know. Speed limit is usually set on the advanced settings of your display. Check that out.

[@azhdarhassan449]

@@joc1862 my bike speed limite exp. date 2017 now i use my bike & used speed limite display but some time my electric bike dis connected i dnt know why ? whats the problem if u know thanks alot

[@joc1862]

@@azhdarhassan449 Mine sometimes stop when I go uphill - motor pulls too many amps from battery & BMS shuts down. Will restart after a few seconds. Other reason for stopping can be faulty brake cut-off switch.

[@Lemonzrool]

Looking at building my own electric bike using 20" wheels, would prefer using the 750W but the spec sheet shows it's for 26" wheels and up? Have you had any issues using the 750W?

[@joc1862]

Nope... It's great on 20" wheels. Gives you lots of torque to go up virtually any hill (with a bit of pedal assist). 26" wheels would give you less torque but greater top speed. With my 25 amp controller I get 35 to 40kph depending on terrain. With my 30a one I get about 45kph. Depends what you want, torque or speed. I need torque because I live in the hills.

[@Lemonzrool]

@@joc1862 Thanks for the reply! Glad you haven't run into any issues! I'm after a balance of speed and torque, 45kph seems like a decent speed though! I reckon I'll find a decent 30A or maybe a little higher amperage controller with the 750W motor and that'll give me what I'm after! Could you let me know what controller you're using??

[@joelthomson1]

I dod a motor riding home one day and the nylon gear cracked leaving my bike a liability. With the school of KZbin it's been fixed 🎉

[@joc1862]

Glad I could help. Cheers...

[@BruceGordon925]

TIRE

[@joc1862]

English spelling, not American...

[@gigifrana940]

Those geared hub motors are inefficient and useless 🤨 they lack of power and speed. They can help if you pedal, but what will be the reason to buy a e-bike if you have to pedal almost all the time?

[@natalinorapacchietta5902]

Pure io sto mettendo motore più grande mia ado a20fat prima età da 250/500 adesso e 500/750 watt acquostato su ali espres arrivo in 6 giorni big fut Mag da 750watt non vedo l'ora di inserirlo e provarlo già vecchio motore faceva 45/50 kmh gps adesso 750watr batteria da 48/20amper controller kt 23amper 9 mosfett dovrebbe fare circa 50/55 kmh gps non vedo l'ora mancano 4 giorni arrivo dell' motore non sto più nella pelle mio causa tre fili delle fasi anno squagliato plastica anno fatto corto insieme bruciato motore modificherò con tubi di plastica per proteggere contatti plug così se toccano fra di loro non faranno più corto circuito potenza tanta fili tendono a sguagkirsi plug allora devo mettere protezione plastica dura per evitare di squagliarsi cin calore passano più di 30/35amper specie in salita fili riscaldano e tubicino plug si riscaldano e se toccano insieme fanno corto circuito devo mettere protezione ogni filo tubicino di alluminio o plastica dura vedrò quando istallerò motore nuovo cosa mi inventerò a presto

[@joc1862]

Quando si lavora con motori potenti è necessario utilizzare cavi sufficientemente spessi per trasportare la corrente senza scaldarsi. È anche una buona idea inserire un fusibile per proteggere il motore e la batteria.

[@leandersmith6184]

Are you kidding me? the 500 watts was way smaller

[@delmanorshun2471]

Yep! The company that built the ebike placed a weaker motor but added powerful controller and battery

[@fraserthomson5766]

@@delmanorshun2471 I think that's what mine is, says 750w but motor is tiny compared to this 750w. Crap on hills too, I'll be upgrading for sure, hopefully my 18amp 48v controller still cuts it..

[@gigifrana940]

If you put to much power they will burn really quick 🤨 very bad design, no cooling at all 👎 Go with the ones without gears or more expensive-mid drive😉

[@joc1862]

No..

[@walley7897]

SORRY this is no upgrade what a joke