Ignition system explained part 1

[@mlr8697]

Thanks for your videos. I have a 1978 Yamaha DT 250 with a 6 volt system. The spark plug coil was not working I cut into the plastic and found that where the wire was soldered to a lug inside was the source of the problem and was able to repair it. You are right the knockoff inexpensive coils do not work

[@2strokeguru]

Welcome I run into it all the time

[@HC-oy3jr]

This is absolutely the best explanation of the ignition system I've come across , My grandfather was an industrial / agricultural equipment mechanic, my father was auto / motorcycle mechanic, my brother is an electrical engineer working for Raytheon. I went another route but am ASE certified so I think it makes my endorsement qualified (per my cousin Vinny clause) Great work sir I'm subscribing doing a great service on alerting the public about the coils, such a rip off 75 bucks a pop coil pack times 8 cylinders on a truck plus labor! ching ching

[@aarongarney2118]

I appreciate the fact that you took the time to teach us about ignition on motorcycles. I am having a weak spark issue on my KTM, and I’ve been doing research. You break it down easily, and make it so the information is easy to retain.

[@2strokeguru]

Thank you i appreciate that ktm i believe uses a blue letter plug try replacing the plug 1st if it fouls once it can damage the plug

[@marknilsson5782]

Your explanation of the third ground is great! I'm sure most people never knew of that, even people that work on bikes in shops. This is just one of the reasons I follow you! 😎

[@2strokeguru]

Thank you Mark I appreciate the compliment I do my best to get my subscribers the most information as possible

[@saqibnawaz5139]

Vry crystal clear & indepth demo of ignition system,most imp cost saving vry minimal parts changing tips if needed

[@2strokeguru]

Thanks I try

[@MsDave64]

Thank you so much. I needed that. Very easy to understand the way you went through it.

[@2strokeguru]

Welcome

[@sandraworkman2946]

Great video you have a great amount of knowledge on these motors could please answer a question for me do i need to have the piston at top dead center too set the points on a 2 stroke motor thank you.

[@2strokeguru]

there's a timing mark on the flywheel and a position mark in the case that's where it needs to be

[@bellatalya5698]

Thank you finally clear and useful information zi can use and not throw many at the unnecessary parts . speaking of parts where do you get the point and condenser for 6V I am working on restoring a 63 Honda C105 Trail 55 Thanks

[@2strokeguru]

Awesome thank you great bikes

[@stevestiles3991]

Great video thank you so much. You didn’t mention replacing the coil wire to the plug. Does that wire go bad could that be the source of my lack of spark?

[@reckless3008]

Awesome video.. what if a single copper wire is broken on my coil ? You said the wrapped coil should have to never be replaced? Is there any way to repair the wire

[@donnielushington4554]

great information, my son recently bought a 1979 ke 125, that was supposed to have been running when parked in a shed 20 years ago but not running now. After getting it home, and having discovered that it had no spark. We then removed the magneto and discovered that the lowest coil is missing ( I assume this is the coil that you are talking about in the video above) and someone appears to have "rewired" one of the lighting coils to replace it. So there is only two of the 3 coils currently there. There is a red and black wire hanging loose. Will this setup work ? If not do you know where can I purchase either a new or used complete stator > thanks and again, great information ,There also appears to be no regulator on this bike, although one is shown in the parts fiche for a 79

[@davidrennicks2484]

I had a XV750 with a misfire @low rev's and I spent much time and expense before I found the simple cause ? Bad ground to the cylinder heads = spark plugs . Added a couple of earth cables ,job done! now runs as it should. Think Ground!!!

[@2strokeguru]

that's on a battery powered ignition this system on the ke kd km uses a different style very easy to understand

[@robertsrbell7811]

What if it is soaked in oil in my case bike is 50 years oldpump let loose and seal on mag side ther for filled up the coils with oil for 50 years i cleaned them with electric cleaner no spark by they way you are awsome thank you love you chanel.

[@2strokeguru]

That would kill it

[@robertsrbell7811]

@@2strokeguru ty I cleaned it ot before trying to start it thes no batt at the time now there's one just found out the points were not working I'll file um your veido let me know ty.

[@kayhewitt]

Thanks for explaining this so simply for folks like me……you should be a instructor if your not already! I’m haven’t problems with erratic starts, it will run then for no reason it won’t start. I’m assuming that it’s the ground on the high voltage coil might be frayed or broken. I will look here this evening and see if that’s the culprit. I never would have even known that could be a problem until I watched your simplified video, thanks!

[@2strokeguru]

I appreciate that! very welcome

[@VashStarwind]

I have the same exact ignition system i am working on a ke100, and having a hard time getting spark, was thinking it was the coil at first, but now i dont really think it is after watching your video. And now I will straight test the coil the way you showed. Thank you this video is very helpful. I am confused tho because when I take my multimeter to the connector at the end of the stator. I have a yellow wire, black wire, light green wire, and pink wire. There is also a separate light blue wire (I think the light green is the neutral switch wire?). When i touch my multimeter to the black wire, and check cont. between the other wires, I get cont with all the other wires except the light green wire. Is this normal or do I have a short in one of my charging coils or something? Having a hard time getting this figured out. At least my service manual should be here tomorrow, but even then idk if i can figure it out.

[@rickgalvan5319]

Nice vid would like to know which points nd condenser would I buy for a 1978 Garelli vip 2 speed deluxe just bought it and think thats the problem please Thanks

[@triplecranks]

I am working on a Suzuki T 500. The right side stops sparking when I spin the engine over a few hundred RPM. Next question is there a high speed and a low speed winding that controls this? Thanks! I love your channel and I subscribed.

[@glencannon3229]

Very well done, not many can or will teach like you do so the ones like me can begin to understand. I think I've had that same set of "new' points!

[@2strokeguru]

thank you

[@allahdaniel212]

If I connect a voltmeter to the black wire from the coil, will I see a reading when the points open/close? Will that be a good test that my points aren’t the problem?

[@arielmotoshop]

Thank you for this video bro, watching you from Philippines

[@2strokeguru]

That's awesome very welcome

[@alansharif9159]

Subscribed, Very informative, Excellent...

[@2strokeguru]

Thank you

[@mdsoto3893]

Kevin Bergeron thank you

[@trustthedogsheneverlies644]

This is brilliant. Thank you!

[@2strokeguru]

Welcome

[@chrisinthecar5689]

I’ve seen some ignition coils go bad, the after market ones are sometimes wound improperly and will bore a hole through the plastic which arks on to the frame, killing spark.

[@2strokeguru]

I have seen 12volt coils go but not on theas 6volt systems

[@sergioflores7169]

Great video, Did you ever get around to swapping the 6 volt system to 12 volt on one of your previous bikes? I think it was a suzuki ts125. Good info here, thanks for posting!

[@2strokeguru]

On my ke102 build

[@westwoodsherm4532]

Thanks Kevin, by the way, I got my Yamaha Chappy tearing up the pavement! Hows the special project going, never saw anything more on the Chappy?

[@2strokeguru]

That's awesome congrats I have a few projects ahead of it but it will be coming

[@TheJohnrob3]

1979 MX100 - Staterb has 2 wires ... do both go to ignition/spark plug coil ?

[@will7its]

Do points magnetos have any form of advance? like as it spins faster it sparks earlier? or is it just set all the time? I have been trying to find the answer with no luck. Please help. Thanks for the video's...

[@2strokeguru]

Not on ke km kd some larger engines do have advance these engines are fixed

[@will7its]

@@2strokeguru How about 1977 dt250? Any idea on yamahas? Thanks for the quick response....

[@2strokeguru]

@@will7its no advance however it does have a adjustable timing

[@alantaylor6691]

Very helpful.

[@sterlingmakara]

I have a 1975 KD125 and I cannot get spark. I can kick it over and it will have a very weak spark for the first kick, then nothing. The points work but the coil only outputs about 1 volt. I don't know how to test the condensor.

[@foesuatalava2335]

Thank you very much very helpful

[@2strokeguru]

Welcome

[@jimmyarmstrong8451]

Was thinking on buying a 1979 Zuki gs425 for $800 what do you think

[@jimmyarmstrong8451]

Suzuki

[@2strokeguru]

Good deal

[@omegaman7241]

good video, thanks

[@2strokeguru]

Welcome

[@jervinclainandalahaw632]

Another great video sir!

[@2strokeguru]

Thank you

[@jervinclainandalahaw632]

@@2strokeguru welcome sir, do you have a video how to install a condenser?

[@Aidenmarin03]

From what bike is that ignition system from?

[@pieseasmyseas]

I have a question abt a 2 cylinder 2 stroke ignition system

[@2strokeguru]

Yes what is your question and what engine

[@pieseasmyseas]

@@2strokeguru it's a 587 seadoo I was wondering if I can use the negative pluse to the lead of the negative side of the coil and a 12v source to the positive side to test fire the engine without the cdi module. If you like I can leave my number in the comments briefly and you can call and help with a nother question that can be a bit harder to word correctly

[@pieseasmyseas]

kzbin.info/www/bejne/hIi0eHqNYpp4bqc I want to wire like this for a test fire I talked to the guy in the video and he said he can not remember the way he wired it

[@2strokeguru]

@@pieseasmyseas call me tomorrow after 6pm eastern time 603 395 8097

[@omegaman7241]

where do you get your points and what is usual price? thanks!

[@2strokeguru]

Ebay Amazon partszilla range in price 15 to 25

[@willybaldsirhenry]

Do you know if there are any differences in the trigger signal from pickup coil, when the coil has one or two wires?

[@2strokeguru]

Different cdi units use different pulse some unit a 6volt some are 12volt using a different pulse pick up can damadage cdi unit the pulse works like a charging coil when the magnet passes buy it creates power and sends it to the cdi using incorrect could too much pulse or not enough

[@sandraworkman2946]

How do you test a point,s condenser with a multi meter.

[@2strokeguru]

You can't test condenser with a multi meter check out ignition videos I have a few of them

[@martindssing1206]

Thank you so much.

[@Billyjoe78517]

Did you move the points away from the coil?

[@danaketcham7124]

What would cause no spark at a new spark plug? But when I take the spark plug off the plug wire and then attach a screwdriver to the wire, and I now can jump spark to the cylinder head... This is on a 1972 ski doo elan 250 single cylinder.

[@nicolec7290]

Doing same thing ( 1978 Yamaha et 250cc ) snowmobile. That sounds real odd. Just cause it’s new doesn’t mean it’s good. Hopefully a new plug will do the trick

[@mlr8697]

@@nicolec7290 there can be resistors in the spark plug cap that can go bad. I know it been a couple of years since your post

[@alderete74]

brilliant lesson thanks.

[@NSBss-df3rb]

My 1974 ke100 flywheel doesn't look coke to this ones on the video,doesn't have thos big magnets instead i have 6pcs of metal inlaid in the flywheel,can you help? Any way i can send pics? I really need help with my bike,here in california is expensive to get a mechanic do a 12v conversion

[@2strokeguru]

Your bike is the old style 6 mag the 3 magnetic I was just checking can't convert it the taper on the crankshaft is different the4 magnetic flywheel will not work

[@2strokeguru]

Plan B1/2 I will have to make one

[@NSBss-df3rb]

@@2strokeguru i have 2 ke100 engines one has the spaghetti wires and the other engine only has 2yellow one blk and one light blue wires,can i make one good motor out of the 2? I just want to have a 12v system on my caferacer

[@2strokeguru]

@@NSBss-df3rb old style I will do a video this week on it

[@mdsoto3893]

Kevin Bergeron could you please tell me what the point sat is it thank you

[@crwdavis]

Hey Kevin, I have a 1980 KD80m, but it has an engine from a KM100a, if I take the flywheel, magneto, and ignition coil plug it all into the KM100 engine, would it work?

[@2strokeguru]

Yes it will KD80M doesn't use charging system

[@crwdavis]

@@2strokeguru just three wires correct? One from the ignition coil (male), one from the on/off switch (male) and they both plug into the female end coming from the magneto/coil?

[@crwdavis]

@@2strokeguru I find it odd that there was no relay for the switch on the KD80 when I got it, it wasn't running at the time so I am not sure if this is correct.

[@2strokeguru]

@@crwdavis theas bikes have old wiring nothing fancy no relays KD80M doesn't even have a fuse because power doesn't travel through the single black wire it a simple ground control

[@crwdavis]

@@2strokeguru thanks Kevin, I should be seeing 6v DC in this system right?

[@plusblood5101]

Sweet

[@alantaylor6691]

Question, is it possible to have weak spark. Reason I ask is a motorbike mechanic on a forum posted that there is no such thing as weak spark, only no spark or complete spark. I am having problems kicksstarting my bike and when I do a spark test it appears that the spark is weak and inconsistent. The symptosm seem to point towards an ignition system problem where I'm getting enough spark for the bike to run well but not enough for it to kickstart. The bike runs great, but is just murder to kickstart. Carbie and pilot jet has been cleaned.

[@2strokeguru]

Yes you can have week spark bike needs a tune up points and condenser and spark plug

[@alantaylor6691]

@@2strokeguru Thanks for that. I have a new iridium spark plug but am going to check the points and other things you mentioned in your video. Just starting on some of your 2-stroke ignition video too. I've just acquired a 1997 KTM 250 EXC. It runs very well but the kickstarter action is rather strange, as if it's got abnormally high compression. It's a hard jerky action and there is often a nasty metal-like crack of some sort partway through the kick. And it often gets caught a bit at top dead centre when kicker is returned to the top. You can't kick it in quick repeated succession like other kickers both because of the hard jerky action as well as getting caught a bit at top dead centre. I though at first it might be crank or something mechanical down there but it runs well when going which I'm assuming would reflect when it's running. So I'm onto ignition. And spark does seem weak and inconsistent. I'm new to mechanics as well as motorbike riding so it's a steep learning curve. Just bought this bike from a neighbour a month ago, my first bike.

[@2strokeguru]

@@alantaylor6691 keep in mind this ignition system design is 6volt developed before the bike was built its used on many vintage bikes so using modern plugs like iridium plugs require a much higher voltage to use this kind of plug the best plug is the plug designed for this application

[@alantaylor6691]

@@2strokeguru Sorry Kevin I can be a bit slow with this kind of stuff and am struggling to understand what you're telling me. Starting from the top: "keep in mind this ignition system design is 6volt developed before the bike was built" I think what you're saying there is that the ignition system you used in this video is a 6-volt system which was developed before my 1997 bike was built (implying that my bike does not have a 6-volt system (probably 12-volt). "its used on many vintage bikes so using modern plugs like iridium plugs require a much higher voltage to use this kind of plug" Meaning the 6-volt ignition system is used on many vitnage bikes, and iridium plugs require a much higher voltage to spark than 6-volt ignition systems. "the best plug is the plug designed for this application" This final sentence seems to be going right over my head. Are you saying that I should not use the iridium plug on my bike because it's voltage requirements are too high for the igntion system I have on my bike? Although that doesn't seem to marry with what I interpreted of the previous sentences.

[@johnpollard6651]

thank you.

[@2strokeguru]

Welcome

[@leecurry8170]

Thank you!

[@2strokeguru]

Welcome

[@jimmyarmstrong8451]

Thanks

[@2strokeguru]

Welcome

[@prohunter3083]

My km100 will run for about 10min then shuts off all the sudden and has no spark. After cooling it will start again. I highly believe the ignition coil is bad! So don't say they never go out!? Not being able to buy parts it's basically a useless bike unless you rewind the coil yourself. Kevin please send me a coil! I can't find them anywhere!! Contact me! Tell me what you think it would be please!😉

[@2strokeguru]

Points and condenser and new plug

[@prohunter3083]

I got new points and plug. Never replaced the condenser!👍 I will do that next.

[@2strokeguru]

@@prohunter3083 replace the condenser

[@zainoelsoroto2776]

My stator doesn't have that switch and the condenser but it has a pulser So whats the difrence between the two

[@2strokeguru]

What bike are you working on

[@zainoelsoroto2776]

@@2strokeguru a yamaha mate V50

[@2strokeguru]

@@zainoelsoroto2776 totally different ignition system

[@zainoelsoroto2776]

@@2strokeguru thought so i think they use you'rs on motor bikes. But it was a great explanation video for people who wants to build a bike

[@2strokeguru]

@@zainoelsoroto2776 please send me pics of your bike and engine 603 395 8097

[@JunaidKhan-ui2fr]

Sir need your help please 😊

[@2strokeguru]

I have responded before what can I do for you

[@JunaidKhan-ui2fr]

@@2strokeguru sir I need your WhatsApp number please

[@JunaidKhan-ui2fr]

Sir

[@2strokeguru]

Hi

[@davidwillis5016]

Ignition coils do go bad so do stator coil, get you some more experience and and correct the video it's misleading

[@2strokeguru]

The Grey 6volt coil I even tried shorting with a 12 volt battery in over 35years working on ke100 the Grey coil will out live the bike if you have a bad one please send it to me I would love to see it

[@2strokeguru]

Email me for address [e-mail] if you have one