Need new motors? break a chain? brakes not work? swapping out pinions or sprockets?

Moderators: robnewyork, bassiclyLouDog, gameboy

#25909
Just picked up a slightly used E300. dont know status on it but I want to make it better...for my 7yr old not me..

already have a 360 power rider that wont hardly go anywhere with what are supposed to be new batteries.

new motor seems to be the first place to start with these so where to get what is mostly used around here on stock parts?
#25911
what version E300? razor used different versions of motors on these so a motor swap isnt necessarily a must-do, especially for a 7yr old.

also what constitutes "better" - does that mean longer run time, higher top speed, etc?

i also picked up an E300 recently for $25. bought a new 24v controller and thumb throttle off ebay for $20. parts are easily found on ebay or any of the online scooter shops. stock razor parts can be had too, but i prefer the non-razor branded electronics as they are universal fit so very easy to interchange...
#25925
better to me usually means "better than the parts that were on it orginally" .....which usually means to me last longer. meaning its doesnt turn into a non working piece of junk that just sits not being used...

I havnt taken it apart so I dont know what version it is. Its grey. thats all I Know...

im not trying to make it faster ..I want it to last longer. like I said I have a razor 360 that he cant ride already that seems to not want to run even with new battery.it runs like it has 1/4 the power it used to. only thing I dont know is if the stock charger didnt charge the battery enough.....but I have now tried 3 batteries with same result. (I also noticed my neighbor has a e200 and it acts the exact same way)


so Im looking towards the worst case scenario which would be replacing motor.

now if you could link me that controller and throttle that would be great...id like to see that.
#25926
the 360 has a blown controller or motor.. the e300 as u describe runs fine and u want more runtime. stock it has 2 7ah batteries i believe. 2 10 ah batteries will fit with some spacers under the deck giving u an additional 15 minutes runtime or roughly an hour..ive never gotten a reliable e300 without a defective controller but others have.. if i was to do simple mods for a grown adult id keep it simple but make a hill climber.
3 10ah batteries, stock run time
1 36 volt controller with hall throttle.
1 36v charger to charge the 36v pack
an 80 tooth sprocket on rear wheel.
3 feet of 25 chain to connect new sprocket.
a chain breaker.
a master link for the chain.
The result will be stock top speed.stock run time, brutal torque compared to stock(STILL NOT FAST), good hill climber, 4 hours work for a beginner,$ 130 in parts.
#25927
the 360 has a blown controller or motor.. the e300 as u describe runs fine and u want more runtime. stock it has 2 7ah batteries i believe. 2 10 ah batteries will fit with some spacers under the deck giving u an additional 15 minutes runtime or roughly an hour..ive never gotten a reliable e300 without a defective controller but others have.. if i was to do simple mods for a grown adult id keep it simple but make a hill climber.
3 10ah batteries, stock run time
1 36 volt controller with hall throttle.
1 36v charger to charge the 36v pack
an 80 tooth sprocket on rear wheel.
3 feet of 25 chain to connect new sprocket.
a chain breaker.
a master link for the chain.
The result will be stock top speed.stock run time, brutal torque compared to stock(STILL NOT FAST), good hill climber, 4 hours work for a beginner,$ 130 in parts.
#25929
WHAT ID REALLY USE PERSONALLY

viewtopic.php?f=18&t=3014
17 tooth sprocket from surplus center .com. 25 pitch, 80 tooth out back for 17-80 ratio
yk 43b controller.
http://www.ebay.com/itm/24-60V-500-1000 ... rC&vxp=mtr
batteries , id chop the deck or put a box out back for 2 18ah batteries which would be 3000 rpm on the motor and provide good runtime.max speed 19mph, brutal wheelie torque
http://www.ebay.com/itm/12V-18Ah-CB19-1 ... YHmkKtGL8A

chain and sprocket
http://tncscooters.com/index.php?route= ... path=63_89

http://tncscooters.com/index.php?route= ... ath=38_103

the stock charger will be used and wired direct to the 24v 18ah pack
controller 38
batteries 62
motor 100
chain and sprocket 40
240 bux, sourcing the parts used like the controller, sprocket and chain should bring the cost down to 175..everyone here has a yk43b and probably chain and the 80 tooth
#25948
robnewyork wrote:the 360 has a blown controller or motor.. the e300 as u describe runs fine and u want more runtime. stock it has 2 7ah batteries i believe. 2 10 ah batteries will fit with some spacers under the deck giving u an additional 15 minutes runtime or roughly an hour..ive never gotten a reliable e300 without a defective controller but others have.. if i was to do simple mods for a grown adult id keep it simple but make a hill climber.
3 10ah batteries, stock run time
1 36 volt controller with hall throttle.
1 36v charger to charge the 36v pack
an 80 tooth sprocket on rear wheel.
3 feet of 25 chain to connect new sprocket.
a chain breaker.
a master link for the chain.
The result will be stock top speed.stock run time, brutal torque compared to stock(STILL NOT FAST), good hill climber, 4 hours work for a beginner,$ 130 in parts.



thanks for all the details in your answer.

first off the 360...its like new so I would like to get it running again. motor does run but its like no power much like when battery is about to die. I need to double check again that the batteries were charged. borrow a charger and charge them. if they are bad then I will buy a battery and go from there.

do these controllers go out frequently? I need to look for replacement for future I suppose. id rather get it running and sell it to use the money towards the other .

about the e300... I need to go and see if the batteries too charge on the scooter and then I can look at all these new parts.

its still for my son so I am not trying to hot rod it until he is good at it.
#25952
i only know the e300 coontrollers are garbage..not certain about 360..usually when a scooter is purchased used that means its been sitting for some time and the batteries are generally dead even when displaying a full voltage charge..lots of kids are happy with the stock e300, and 9ah batteries are the same size as 7ah.. so he should get 1 hr run time with new batts..
id personally build one for u and go crazy on that one, then u can ride with him and make a real beat e300.. I built a 7000watt e200 that almost killed a friend and hit 40 no issue..making a reliable hill climber out of an e300 is easy and fairly cheap if the donor chassis is cheap.industrial 100, yk43b 40, 3 18ah batteries 99, wire and custom deck from scrap, maybe another 30..lets say 300 and some sweat.
#25954
robnewyork wrote:i only know the e300 coontrollers are garbage..not certain about 360..usually when a scooter is purchased used that means its been sitting for some time and the batteries are generally dead even when displaying a full voltage charge..lots of kids are happy with the stock e300, and 9ah batteries are the same size as 7ah.. so he should get 1 hr run time with new batts..
id personally build one for u and go crazy on that one, then u can ride with him and make a real beat e300.. I built a 7000watt e200 that almost killed a friend and hit 40 no issue..making a reliable hill climber out of an e300 is easy and fairly cheap if the donor chassis is cheap.industrial 100, yk43b 40, 3 18ah batteries 99, wire and custom deck from scrap, maybe another 30..lets say 300 and some sweat.


I did some looking around for parts off ebay for the e300. How many versions are there of these things? the 7/8th number on mine is 38...is there really 38 versions or did I pick the wrong number? I got that off the tag that had serial numberwritten on it.

anyhow....I plan to pick up thumb throttle if I can find one that fits this one....and 2 9ah batteries...and ....I will upgrade rest as I learn. I am so new to this and I have a lot to learn.

is there a list out there for parts so I dont have to sort through entire ebay?

40mph on one of these seems like it would be a little scary...
#25958
yes thats overkill (40mph ) im just saying the obvious limitations doesnt mean yoiu cant make it an adult ride. I dont know if thats the correct model # but sounds right.. Also im not sire if the stocck controller will run a hall throttle, ive always replaced the controller and got a combo kit instead.

http://www.ebay.com/itm/24V-250W-motor- ... SwnLdWqWsi

http://www.ebay.com/itm/151734115776?_t ... EBIDX%3AIT

heres a cheapo combo ^
or simply do 3 9ah batteries and the above throttle combined with

http://www.ebay.com/itm/36V-36-VOLT-250 ... NA&vxp=mtr
http://www.ebay.com/itm/New-36-Volt-1-5 ... SwSdZWg0f9

http://www.ebay.com/itm/12V-9AH-SLA-Bat ... SwXshWtKtJ

http://www.ebay.com/itm/100x-Blue-Insul ... Sw8-tWXsBm

http://www.ebay.com/itm/80-Tooth-Rear-S ... SwPe1T4R8Z

http://www.ebay.com/itm/25H-Chain-With- ... -H&vxp=mtr

http://www.ebay.com/itm/Roller-Chain-Br ... Swo3pWcaIq

hope this helps, it goes fast when u know what to search..when u set ur exact goals we can narrow it down fast .
#25960
gentlejax wrote:better to me usually means "better than the parts that were on it orginally" .....which usually means to me last longer. meaning its doesnt turn into a non working piece of junk that just sits not being used...

you can certainly spend more on a higher quality controller, such as a kelly, but to me that's not cost efficient to put a nice controller on a low budget platform such as a kids razor scooter. for these type of projects i prefer to buy cheap univeral controllers in bulk, so i have spares on hand and to make upgrading/replacing much much easier. but i wouldnt say these controllers are better, wouldnt surprise me if razor controllers were coming out of the same factory. IMHO its more a case of you get what you pay for.

gentlejax wrote:I havnt taken it apart so I dont know what version it is. Its grey. thats all I Know...

may not need to take it apart if you can locate the UPC label... it'll provide the version #:

Image

gentlejax wrote:im not trying to make it faster ..I want it to last longer.

...
so Im looking towards the worst case scenario which would be replacing motor.


i've picked up a few neglected razors off craigslist and in almost all cases the batteries were bad. if not the batteries then some combination of controller and/or throttle defect. the motors were fine every time. what i think happens is the batteries get run down too much, or there a wiring issue with the controller or throttle. preventing any damage or overuse of the motor.

getting back to the version # - for versions 36 and up razor used a motor on the E300 that uses a 10-tooth sprocket and will accept the 9-tooth sprocket. this is a nice motor for a child or lightweight rider and given the sprocket options it will overvolt well if you choose that option down the road.

for reference, i have a thread on the E300 and x-140 scooters i picked up for my kids which might be helpful for your build. my goals are similar - not too fast, decent torque, longer runtime, limited budget:

viewtopic.php?f=13&t=3063

here are the links to the parts i used for the E300 rebuild:

variable speed thumb throttle with battery meter, replacing the one speed half twist throttle with no battery meter:

http://www.ebay.com/itm/252301399173?_t ... EBIDX%3AIT

http://www.ebay.com/itm/380927044225?_t ... EBIDX%3AIT

i bought two different types of thumb throttles and installed the latter, but in retrospect should have installed the throttle in the first link as the on/off switch is built in and in a more convenient location than having to bend down.

here's how it looks installed:
Image

24v 500w yiyun controller, i bought 3 of these:
http://www.ebay.com/itm/252182148246?_t ... EBIDX%3AIT

also bought a couple of these since i swapped out the stock reset switch:
http://www.ebay.com/itm/151817188041?_t ... EBIDX%3AIT
#25969
zen_racer wrote:
gentlejax wrote:better to me usually means "better than the parts that were on it orginally" .....which usually means to me last longer. meaning its doesnt turn into a non working piece of junk that just sits not being used...

you can certainly spend more on a higher quality controller, such as a kelly, but to me that's not cost efficient to put a nice controller on a low budget platform such as a kids razor scooter. for these type of projects i prefer to buy cheap univeral controllers in bulk, so i have spares on hand and to make upgrading/replacing much much easier. but i wouldnt say these controllers are better, wouldnt surprise me if razor controllers were coming out of the same factory. IMHO its more a case of you get what you pay for.

gentlejax wrote:I havnt taken it apart so I dont know what version it is. Its grey. thats all I Know...

may not need to take it apart if you can locate the UPC label... it'll provide the version #:

Image

gentlejax wrote:im not trying to make it faster ..I want it to last longer.

...
so Im looking towards the worst case scenario which would be replacing motor.


i've picked up a few neglected razors off craigslist and in almost all cases the batteries were bad. if not the batteries then some combination of controller and/or throttle defect. the motors were fine every time. what i think happens is the batteries get run down too much, or there a wiring issue with the controller or throttle. preventing any damage or overuse of the motor.

getting back to the version # - for versions 36 and up razor used a motor on the E300 that uses a 10-tooth sprocket and will accept the 9-tooth sprocket. this is a nice motor for a child or lightweight rider and given the sprocket options it will overvolt well if you choose that option down the road.

for reference, i have a thread on the E300 and x-140 scooters i picked up for my kids which might be helpful for your build. my goals are similar - not too fast, decent torque, longer runtime, limited budget:

viewtopic.php?f=13&t=3063

here are the links to the parts i used for the E300 rebuild:

variable speed thumb throttle with battery meter, replacing the one speed half twist throttle with no battery meter:

http://www.ebay.com/itm/252301399173?_t ... EBIDX%3AIT

http://www.ebay.com/itm/380927044225?_t ... EBIDX%3AIT

i bought two different types of thumb throttles and installed the latter, but in retrospect should have installed the throttle in the first link as the on/off switch is built in and in a more convenient location than having to bend down.

here's how it looks installed:
Image

24v 500w yiyun controller, i bought 3 of these:
http://www.ebay.com/itm/252182148246?_t ... EBIDX%3AIT

also bought a couple of these since i swapped out the stock reset switch:
http://www.ebay.com/itm/151817188041?_t ... EBIDX%3AIT




You have the exact model as I do..mine is also #38 so this makes it a lot easier to swap out some parts after I get nnew batteries. thanks!
#25996
got 2 new batteries and they are charging still after 3hrs so maybe all the batteries I had were junk...I bought new ones local so I knew they were good and i have some warranty.

anyhow..the motor on the 300 not that big. using the parts you listed above would that then allow me to put in bigger motor?


whats the biggest motor that can go in as stock?
#25997
the parts i listed are to match the stock motor and a replacement motor will make zero difference on 30 amps.., the torque and speed will remain the same even with a 1000-watt unless u upgrade the controller and perhaps the batteries.. unless u were running high amperage the stock motor is all u need,
#25998
gentlejax wrote:anyhow..the motor on the 300 not that big. using the parts you listed above would that then allow me to put in bigger motor?

whats the biggest motor that can go in as stock?

that motor is fine for that platform and for a 7yr old... were you planning on riding it yourself? if so 350-450w would probably be the biggest direct drop in. but then you've upped your power requirements for not much if any performance gain?

might want to identify your goals with a motor swap before throwing away cash on a bigger motor. the beauty of this specific motor is the available sprocket options which will provide a cheaper route to speed or torque gains.

if you pull out this motor, the bigger motors will only allow an 11-tooth sprocket. so off the bat youre losing torque on the gear ratio which would offset gains from a higher wattage motor.
#26027
gentlejax wrote:what is a good replacement of same size motor to get that will direct swap? I will run this one till it dies..

unless you intentionally run this motor in stall conditions or overvolt, i'd expect either the battery pack or the controller to fail before the motor does... in the stock configuration the motor is not the weak link.

for a replacement motor, who will be riding and what are the goals - higher top speed, more torque, longer runtime, budget limitations, etc?
#26037
zen_racer wrote:
gentlejax wrote:what is a good replacement of same size motor to get that will direct swap? I will run this one till it dies..

unless you intentionally run this motor in stall conditions or overvolt, i'd expect either the battery pack or the controller to fail before the motor does... in the stock configuration the motor is not the weak link.

for a replacement motor, who will be riding and what are the goals - higher top speed, more torque, longer runtime, budget limitations, etc?


I wasnt going to replace it until the motor died. they arent that expensive that I cant buy one to hold on to.

It is working now after charging it for 12hrs. its fast I guess..but could be faster..

what does changing the sprocket do for it? you said this motor was good in that it can change sprocket and work. what is the benefit?
#26039
the batteries shouldnt take 12 hours so my bet is there not dead just bareely hanging on.. and your idea of fast is based on what your expectations from an electric scooter are.. when ur scared your gonna get into a bad accident by hitting the throttle thats when its fast.like zen said , setting goals makes a plan easier, 36v mod will simply increase top speed 50 percent , so if ur doing 12mph now you will do 18mph on 36v, no hill climbing gain.
#26040
gentlejax wrote:I wasnt going to replace it until the motor died. they arent that expensive that I cant buy one to hold on to.

It is working now after charging it for 12hrs. its fast I guess..but could be faster..

what does changing the sprocket do for it? you said this motor was good in that it can change sprocket and work. what is the benefit?

changing the rear wheel sprocket AND/OR the motor sprocket will change the gear ratio. the gear ratio will determine torque and top speed.

changing sprockets is much cheaper than buying a motor. the motor you have now has more sprocket options than the other motors you may be looking at.

it doesnt make sense to me to buy a new motor unless you have a clear purpose for that motor. we still don't know what your goals are?

sounds like you want more top speed for yourself, or is this scoot still for your 7yr old? these things make a difference when deciding on a motor replacement...
#26045
to make it clear, on the stock controller you can add a 5hp industrial and yield zero gains, people like to relate this to gas motors but its quite different.. the controller dos what it says , controls the power..You can gain top speed and some toque with the stock controller and gearing changes, but for substantial gains the controller is the limiting factor.
#26112
robnewyork wrote:the batteries shouldnt take 12 hours so my bet is there not dead just bareely hanging on.. and your idea of fast is based on what your expectations from an electric scooter are.. when ur scared your gonna get into a bad accident by hitting the throttle thats when its fast.like zen said , setting goals makes a plan easier, 36v mod will simply increase top speed 50 percent , so if ur doing 12mph now you will do 18mph on 36v, no hill climbing gain.


batteries are new 9ah . I replaced them thursday and let it charge over night

scooter is fast enough for the kids after watching them ride over the weekend.
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