For information this is a good type of a video gets to the point. Just about how I would make one. Well done brother.. sincerely,Quick. Ps. The only thing I would have added is the spread range 455-545 ohns/resistance. 😊
Thanks for the kind words. 15hours really isn't alot for issues like this, it might be possible for your dealership to approach KTM in regards to a refund on parts? I have herd KTM can be great to deal with in situations like yours compared to other manufacturers.
I have been experimenting with low resistance in stators. I baked the stator at 350 degrees for 10 minutes. The resistance came back after cooled. Worth a shot if youre stator is smoked anyway
Great video! After watching this I measured the stator of my kid's KTM (289 ohm) so tomorrow I'll pick up a new stator and hopefully the bike will start.
Hey man Question for you did the bike have spark still and was a pig to start? very hard time to start bog when dump throttle if you can even get it started
@@Gr33n3r123 Our bike didn't start at all with the bad stator. What's your reading of the stator? I belive a stator that's starting to go bad will make the bike hard to rev. Have you checked the carb? Take it apart and clean it thoroughly with carb cleaner or brake cleaner.
Great video just wanted to give you a heads up on what in my opinion on these stators. The stator is a very poor and cheap design. What causes them to go bad. The plate stack is weak and over time with heat and cooling cycles the expand then contract. The rivets that hold the stack together stretch and the plates become loose. This can be tested by taking a heat gun to the stator heating it causing the plates to expand. Then check the ohms with your meter and see what you get. I just went from 280 cold to 500 hot. Now when it cools back down it went right back to 280 ohms. I also heated the bad stator then placed it in the bike hot and the bike started first kick. Just a FYI I would think that KTM would have some type of recall on this issue since these stators are just a junk design. Test this out for your self. The stators I would think could be repaired since there really not bad. I wouldn’t even bother getting a oem stator Amazon has lots of cheap ones that will last just as long.
Some really good info there Michael thanks. You sure have looked into it alot more than I have. I have also herd of people having a good resistance reading cold, but breaking down with heat. Sounds like some real quality control issues
@@jameswharton3143 cold start with heat expansion after running the bike could also cause a very high ohm reading that could cause damage to the coil , plug and also the pickups on the stator. There are 2 issues one cold one hot. Same results
Top Video!!! I would like to ask you a little question. What a spark plug reference would you advise me to put in my ktm 50 sx 2016? advise the model that the bike brings or is there a spark plug reference that works better?
Hi Luis. NGK LR8B is the stock plug. A plug you can try is the NGK C7HSA which is a hotter heat range. Some have had success with changing to the C7, and is a popular off the shelf plug so you shouldn't have any trouble sourcing it.
Hello, nice vid bro!!!! mine have a problem its start and run but the problem is when it run like 3km-5km it become hardly take off ,not running but its start... mayb its stator or clutch??? thanks man.
Hey Scott, you need to hold it with a special tool while removing the nut, or give an impact gun a go. Have a look here www.manualslib.com/manual/1168651/Ktm-50-Sx.html?page=73#manual
Hello friend.I'm from Brazil, I bought an ignition from this ktm50sx but I don't know the point or calibration of it, because you installed a mobylette which is the original spark point? for me to have a starting point. thanks
Bought my son a 2015 ktm50sx mini today cannot get it running -Has 120psi compression I don’t know what it should be -cleaned the carb -checked the stater -checked the coil -kill switch is working -gap on the spark plug is correct -pulled the reeds look good -all head bolts are tight Won’t even fire off starting fluid Help !
I'm having a mini adventure that is giving me electrical fits. Will the readings be similar. I can't find specs on it anywhere. Thanks for the video. I'm getting 438 ohms
@@jameswharton3143 it's a 2005 mini adventure. Yesterday it randomly shut off 4 times all at the end of straight aways. Fired back up first or second kick Everytime. Then it just died and completely lost spark. It has a super cheap aftermarket electrical system that only has a few hours on it.
@@sasquatchracing247 Looks like the part number for the stator is the same for your 2005, so your reading isn't too bad. pdfstream.manualsonline.com/5/559f2538-52c3-4960-bf49-b111c351d07b.pdf I found this manual which looks suited to your bike, check out page 7-4E (59)
Merci pour les vidéos. C'est très instructif. Mon fils a une 50sx de 2016. Je viens de changer les disques d'embrayage, elle a fonctionné 1h puis elle s'est mise à s'emballer, moteur à fond (câble d'accélérerateur neuf donc pas de problème de ce côté). Depuis impossible de la redémarrer. J'ai nettoyer le carbu et changer la bougie mais rien... As tu déjà eu ce genre de problème sur les 50 ? Désolé d'écrire en français. Merci. 😉
Bonjour, l'embrayage ne laissera pas le moteur tourner librement, je doute donc que votre problème soit lié au travail d'embrayage que vous avez effectué. Avez-vous vérifié les fuites d'air? Le câble d'accélérateur est-il correctement installé? Y a-t-il une petite quantité de pile sur l'accélérateur?
Hey man Question for you did the bike have spark still and was a pig to start? very hard time to start bog when dump throttle if you can even get it started
Hey that 13m nut how do you take it off you said you did it with the impact but when I try to loosen it it spins the wheel. Now I could hold the magnetic piece with Chanel locks but it would scratch the shit out of it. When I ordered my stator it came with a new little magnet piece so I figured I’d change it but can’t figure it out
Hey mate thanks for the vid my boys 2016 50 senior has 507 ohms after a struggle to get it running I got on it my self and have it a good run it didn’t seem to be pulling as hard as it used to mind you the clutch is original but I did another test on the stator after it got hot and got a 620 ohm reading what’s your thoughts on that ?
Interesting one Luke. To my it sounds like your stator is ok, by rights a hot component should have an increase in resistance. I'll test mine hot this weekend and get back to you
The sator is the equivalent of an alternator. The stator for the ktm50 has 2 "cores" the core is a magnet that has been wrapped in insulated copper wire. As the "flywheel" turns. This causes induction between the cores and the flywheel producing a/c current which energizes the ignition coil. Hope this helps. If you dont understand, look up the definitions one by one.
Hey mate. I have found lots on ebay (Australian based) selling the stator for under $50. but they all say, 2002-2012 models. The new genuine 2017 one from my store, are $160. Is this correct?
Hi there, the correct part number for your bike is 451 39 004 000. $160 sounds correct. The $50 Ebay ones you are describing are aftermarket Chinese replicas which I don't have any experience with. They could be worth a shot but I would question their reliability.
My 50sx started missing then died when my boy was riding then wouldn't start it will start on the stand and die as soon as it touches the ground I just rebuilt the top end so I'm thinking the stator has went bad
Hello James, great video!!! Would you have specs for the coil by any chance? I checked my stator and is reading 486.2 ohms so I guess that is ok but I am now suspecting a faulty coil. The bike is a 2018 KTM 50 SX which has done 37hours and suddenly started to miss and struggles to hit powerband, cleaned carby, fresh fuel, checked fuel breather lines, check reeds, new air filter , new plug, checked fuel flow from tank and all appeared spot on. Any help would be greatly appreciated. Thank you.
Hi there. Spec for stator is between 450 and 550 ohms so yours is in spec. In saying that I have herd some can test fine cold but once at operating tempreture they then be out of spec. Have you checked your carb vent tubes? Could also be jetting have you looked into that?
James Wharton Yes I have checked vent tubes and they are ok. The jetting is fine because it was running perfect before just all of a sudden started running bad. Starts good hot and cold but just struggles to rev out and misses about 1/4 to 1/2 throttle. I wanted to see if I could find what readings the coil should be putting out but haven’t been able to find any specs on the net.
Bro, you’re my go to for the KTM 50 vids. Incredibly helpful! Thank you from across the pond!
Hey thankyou very much you are more than welcome
These videos you are making are extremely helpful. Thanks for taking the time to make these, it’s a lot of work, but is very much appreciated. Cheers!
Thanks for kind words yes they are not always easy to make. Like and Share if you can 🙂
For information this is a good type of a video gets to the point. Just about how I would make one. Well done brother.. sincerely,Quick. Ps. The only thing I would have added is the spread range 455-545 ohns/resistance. 😊
Thanks man awsome video my sons 2020 Sx mini lost spark at 15hrs thanks to your video i found the problem
Thanks for the kind words. 15hours really isn't alot for issues like this, it might be possible for your dealership to approach KTM in regards to a refund on parts? I have herd KTM can be great to deal with in situations like yours compared to other manufacturers.
@@jameswharton3143 hello james. Je vous ai écrit sur messenger facebook car j’ai un problème sur 50sx. Pouvez vous m’aider? Merci
I love your videos
Thank you. I do love it when you clearly state the tools being used in each project.
I have been experimenting with low resistance in stators. I baked the stator at 350 degrees for 10 minutes. The resistance came back after cooled. Worth a shot if youre stator is smoked anyway
Great video! After watching this I measured the stator of my kid's KTM (289 ohm) so tomorrow I'll pick up a new stator and hopefully the bike will start.
Sounds like that could be your issue, let us know how it goes 🤟
New stator installed an new spark plug as well. The bike starts at the first kick again. Thanks again for a great video!
Your welcome that's fantastic you got it sorted 🤟
Hey man Question for you did the bike have spark still and was a pig to start? very hard time to start bog when dump throttle if you can even get it started
@@Gr33n3r123 Our bike didn't start at all with the bad stator. What's your reading of the stator? I belive a stator that's starting to go bad will make the bike hard to rev.
Have you checked the carb? Take it apart and clean it thoroughly with carb cleaner or brake cleaner.
Great video mate help me fix my young fella’s bike.
Hey Eric glad it helped
Thank you brother - I was about to throw my 2018 off a cliff.
Great video just wanted to give you a heads up on what in my opinion on these stators. The stator is a very poor and cheap design. What causes them to go bad. The plate stack is weak and over time with heat and cooling cycles the expand then contract. The rivets that hold the stack together stretch and the plates become loose. This can be tested by taking a heat gun to the stator heating it causing the plates to expand. Then check the ohms with your meter and see what you get. I just went from 280 cold to 500 hot. Now when it cools back down it went right back to 280 ohms. I also heated the bad stator then placed it in the bike hot and the bike started first kick. Just a FYI I would think that KTM would have some type of recall on this issue since these stators are just a junk design. Test this out for your self. The stators I would think could be repaired since there really not bad. I wouldn’t even bother getting a oem stator Amazon has lots of cheap ones that will last just as long.
Some really good info there Michael thanks. You sure have looked into it alot more than I have. I have also herd of people having a good resistance reading cold, but breaking down with heat. Sounds like some real quality control issues
@@jameswharton3143 cold start with heat expansion after running the bike could also cause a very high ohm reading that could cause damage to the coil , plug and also the pickups on the stator. There are 2 issues one cold one hot. Same results
Great video. Thanks. 👍
Your welcome thanks!
Great video thankyou very helpful and well explained 👍
Thanks Stephen much appreciated
Top Video!!! I would like to ask you a little question. What a spark plug reference would you advise me to put in my ktm 50 sx 2016? advise the model that the bike brings or is there a spark plug reference that works better?
Hi Luis. NGK LR8B is the stock plug. A plug you can try is the NGK C7HSA which is a hotter heat range. Some have had success with changing to the C7, and is a popular off the shelf plug so you shouldn't have any trouble sourcing it.
thanks for taking the time to make these vids. you have really helped me out quite a lot so thanks for that.
Great vid helped a lot thanks mate ☝️
Thanks from france 😉
Your welcome Edd
hi. would a reading of 425 oms make the bike splutter at high revs?
How do you know that is going bad does the bike just cut out or does the bike just quit working?
Thank you for the video 😊
Great info
Hello, nice vid bro!!!!
mine have a problem its start and run but the problem is when it run like 3km-5km it become hardly take off ,not running but its start... mayb its stator or clutch??? thanks man.
Hi Jayvy, have you tested the stator? New spark plug and making sure the stator is reading in the correct range would be where I would be starting
Thank you buddy! Usefull!
Hey james, i need help.. is it okay if i drill a hole on my ktm 50 sx stator cover? Whats the pro and cons?
If the bike bogs and dies randomly could that be the stater?
Yes it could be. Also would drain and carb to eliminate that along with a new plug
Great video thanks!!! But how do you get of the rotor?
Hey Scott, you need to hold it with a special tool while removing the nut, or give an impact gun a go. Have a look here
www.manualslib.com/manual/1168651/Ktm-50-Sx.html?page=73#manual
I get open circuit but the bike still runs. It bogs when hot and becomes hard to start after 10-15mins of riding.
Very nice video!!! New Subscriber here!
Thanks alot hope you enjoy the content
Did you have to set timing after the change
No its a straight swap
How do you test the ignition coil mate?
What readings should it have?
Cheers Trent
Hello friend.I'm from Brazil, I bought an ignition from this ktm50sx but I don't know the point or calibration of it, because you installed a mobylette which is the original spark point? for me to have a starting point. thanks
Hello.How când i test ignition copil on ktm 65 sx 2012?Plecase please
Hey mate great videos they've helped me alot so thanks for that. Have you had to replace water pump and seals etc?
Hey there no I haven't, my 2019 was rock solid and never did one. I have found the 2016 and earlier seemed to do them more
Is this the same on the pro senior ?
Bought my son a 2015 ktm50sx mini today cannot get it running
-Has 120psi compression I don’t know what it should be
-cleaned the carb
-checked the stater
-checked the coil
-kill switch is working
-gap on the spark plug is correct
-pulled the reeds look good
-all head bolts are tight
Won’t even fire off starting fluid
Help !
It has spark
What if my stator is testing high? 670 ohms
I'm having a mini adventure that is giving me electrical fits. Will the readings be similar. I can't find specs on it anywhere. Thanks for the video. I'm getting 438 ohms
Hi it sounds ok. What year is the bike?
@@jameswharton3143 it's a 2005 mini adventure. Yesterday it randomly shut off 4 times all at the end of straight aways. Fired back up first or second kick Everytime. Then it just died and completely lost spark. It has a super cheap aftermarket electrical system that only has a few hours on it.
@@sasquatchracing247 Looks like the part number for the stator is the same for your 2005, so your reading isn't too bad.
pdfstream.manualsonline.com/5/559f2538-52c3-4960-bf49-b111c351d07b.pdf
I found this manual which looks suited to your bike, check out page 7-4E (59)
rewinding stator coil
Merci pour les vidéos. C'est très instructif. Mon fils a une 50sx de 2016. Je viens de changer les disques d'embrayage, elle a fonctionné 1h puis elle s'est mise à s'emballer, moteur à fond (câble d'accélérerateur neuf donc pas de problème de ce côté). Depuis impossible de la redémarrer. J'ai nettoyer le carbu et changer la bougie mais rien... As tu déjà eu ce genre de problème sur les 50 ? Désolé d'écrire en français. Merci. 😉
Bonjour, l'embrayage ne laissera pas le moteur tourner librement, je doute donc que votre problème soit lié au travail d'embrayage que vous avez effectué. Avez-vous vérifié les fuites d'air? Le câble d'accélérateur est-il correctement installé? Y a-t-il une petite quantité de pile sur l'accélérateur?
Hey man Question for you did the bike have spark still and was a pig to start? very hard time to start bog when dump throttle if you can even get it started
Hey there the bike started fine cold but very hard to start warm. Still had a spark
Hey that 13m nut how do you take it off you said you did it with the impact but when I try to loosen it it spins the wheel. Now I could hold the magnetic piece with Chanel locks but it would scratch the shit out of it. When I ordered my stator it came with a new little magnet piece so I figured I’d change it but can’t figure it out
Hey Steve I used an Air Impact wrench and it came pretty easily. What type of impact are you using?
Hey mate thanks for the vid my boys 2016 50 senior has 507 ohms after a struggle to get it running I got on it my self and have it a good run it didn’t seem to be pulling as hard as it used to mind you the clutch is original but I did another test on the stator after it got hot and got a 620 ohm reading what’s your thoughts on that ?
Interesting one Luke. To my it sounds like your stator is ok, by rights a hot component should have an increase in resistance.
I'll test mine hot this weekend and get back to you
Just tested hot, reading 629 ohms. I think your stator is ok
Hi, I’m the grandmother that has to work on my grandson’s bike. I’m not sure what a stater is.
The sator is the equivalent of an alternator. The stator for the ktm50 has 2 "cores" the core is a magnet that has been wrapped in insulated copper wire. As the "flywheel" turns. This causes induction between the cores and the flywheel producing a/c current which energizes the ignition coil. Hope this helps. If you dont understand, look up the definitions one by one.
Hey mate where do you get your stators from, I’m in FNQ and finding it hard to get one for a KTM 85sx 2007
Hi Brody I get mine from KTM dealerships, maybe call around a few. I have herd parts are getting a bit scarce due to Covid
Hey mate. I have found lots on ebay (Australian based) selling the stator for under $50. but they all say, 2002-2012 models. The new genuine 2017 one from my store, are $160. Is this correct?
Hi there, the correct part number for your bike is
451 39 004 000. $160 sounds correct. The $50 Ebay ones you are describing are aftermarket Chinese replicas which I don't have any experience with. They could be worth a shot but I would question their reliability.
My 50sx started missing then died when my boy was riding then wouldn't start it will start on the stand and die as soon as it touches the ground I just rebuilt the top end so I'm thinking the stator has went bad
Go back to the basics, new plug, check carb vent tubes are not clogged, check carb jets are clean. See how stator tests out?
Hello James, great video!!! Would you have specs for the coil by any chance? I checked my stator and is reading 486.2 ohms so I guess that is ok but I am now suspecting a faulty coil. The bike is a 2018 KTM 50 SX which has done 37hours and suddenly started to miss and struggles to hit powerband, cleaned carby, fresh fuel, checked fuel breather lines, check reeds, new air filter , new plug, checked fuel flow from tank and all appeared spot on. Any help would be greatly appreciated.
Thank you.
Hi there. Spec for stator is between 450 and 550 ohms so yours is in spec. In saying that I have herd some can test fine cold but once at operating tempreture they then be out of spec.
Have you checked your carb vent tubes?
Could also be jetting have you looked into that?
James Wharton
Yes I have checked vent tubes and they are ok. The jetting is fine because it was running perfect before just all of a sudden started running bad. Starts good hot and cold but just struggles to rev out and misses about 1/4 to 1/2 throttle. I wanted to see if I could find what readings the coil should be putting out but haven’t been able to find any specs on the net.
@@MrMotocross450 Sorry coil resistance should be between 2.025 to 2.475K Ohms
James Wharton is that measured with spark plug cap on from spade terminal to cap?
@@MrMotocross450 imgur.com/a/YOMBk04
You didn't gap the stator dude