No Spark on $150 Locked-Up Barn Find "Dirt Bike." Will It Run? (Part 3)
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- čas přidán 28. 07. 2024
- I buy a new ignition coil for the $150 locked up dirt bike (dt250) and attempt to start it for the first time. Will this old motorcycle run for the first time in years? #Yamaha, #Vintage, #250cc,
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So what do you guys think?
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I woud say its deffinitly the stator get a new one dude .
New stator
I think your points are grounded
Go look at some diagrams, CMS has them and they’ve got parts too. Stator is probably dead my guy.
Couple months ago i had the same issue with a different bike, turn out that the guy had change his points and he forgot a tiny plastic washer between the wire from the points to the condensor. The bike come to me with also no spark
Hey! You basically found the problem without even knowing it.. The one section of the stator where the copper windings go around the core that bolts to the stator plate is likely your problem.. The copper windings likely have shorted to the core that bolts to the stator plate.. You can test this by removing that section from the stator plate and test with you meter. Ground one lead of your meter to the core and the other lead to the wire that connects to the copper windings.. If you get a beep or a short with that test then you know that the copper windings have shorted to the core.. Hopefully that makes sense.. Theres two stator sections.. One is for charging and one is for ignition.. The one closer to the front of the bike as your facing it is for ignition.. One towards the back is for charging.. You can also do a resistance test and see what you get.. But my bet is the the windings have shorted to the core.. Good luck! You vids have come along ways.. Nice job!
Brian K exactly.
Never even though about that but yeah if its shorted, no spark.
You could swap the wire going to the windings . Use the one for the lighting circuit on ignition. My .02 worth
Exactly!
Is this a common failure? I would have never thought of that. Could you unwind it and put a new insulator on it and rewind it? If parts are unavailable or just for testing purposes?
Looks like the whole of the points are grounding out.Should be some form of insulating plastic washer/cap where the single wire connects to the points.I would also replace the points and condenser .
i was thinking the same thing. That or on the points.
thats the problem have made the same mistake my self
When you replaced the coil and kicking it over and not getting a spark, I was thinking it has to be the ground.
Well done for checking and spotting the problem. Electrics are difficult on vehicles and hard to diagnose.
I know it lowers your belief in the bike, but hang on in there and you will have a good bike at the end.
Got sooo hyped when i saw u uploaded
You're a machine man. Nothing like wrenching on a machine in the freezing. Everything hurts way more when you bang your hand on something. This is dedication!
Change the condenser
Change points and condenser. Dont give up on it. Your close to figuring it out.
Agreed, my favorite part to watch is the challenge
And then the hard fought victory
That's what I've been saying since part one hopefully he will idk why he didn't yet
I agree the thing has been sitting it does seem to be grounded out or the points are bad go ahead and replace them and see if it works
Really need a good burning wood stove in that shop
its a house garage..
Not sure what the laws are in that area but as long as the garage isn't attached to the house you could run a wood stove
@Ram The Man Or you could just do it anyway. It’s not like building officials are hiding in the bushes. You could even build a “mobile” wood stove that you partially disassemble and store away when not in use. Have the chimney go through a window or doorway. Just make sure the combustibles are stored outside.
@@jasonpaupst9771 yeah or a cheap used kerosene heater or two, got one for 10 bucks, but doesn't throw off nearly as much as a good wood stove.
give it time he's still a young buck , once he gets a few arthritic joints in him he'll get a good heat scores ...haha
Switch coil for headlight for spark
You are nearly there. Don't give up on it!
The wire going around the core have some very thin insulator, otherwise you end up with is a coil with just one turn of wire.
Enameled wire if I recall correctly. My best bet is that the insulator is worn down, and shorting the circuit. I only have experience in the area from brushless motors. The concept is the same, only in reverse. Rewiring brushless motors is not hard, it shouldn't be any different here. Certainly saves a lot of money and is a nice skill to have.
Another concern I had watching this, is how wet it's inside the flywheel area.
You could be nearly there with solving the issue. Check the windings on the source coil are not shorting to earth (ground). Also points have small fibre insulation that the moving part of the points run on. If these wear they can short. You didn't need to take the top end off to pull the fly wheel. Impact gun to remove the nut and stop the fly wheel from moving using a spanner on the puller. Good luck.
Instead of removing the jug and bracing the connecting rod you can pop out the plug and jam rope or paracord down inside. It will stop the piston without damage.
We work on old hit&mis motors and old Maytag motors and on most of them you have to isolate the points and stator from the frame we use gaskit material and small neopreme washers or in cases have used faucet washers just anything to isolate them from the frame
Reach out to mustie1, master of fixing old-school rust bucket junks.
I friggin love @mustie1
I watch all his videos!
@@2vintage yeah mustie1 is a master at points, well he’s basically a master at it all. Definitely reach out to him
"Hey guys and how's it going?"
@@johnwoods3061 "Thanks for hanging out and watching me wrench on rusty junk."
I always found some soft rope and put it down the spark plug hole to lock up the motor. When done just pull the rope out. I never had a issue
Yup rope in plug hole. Don't disassemble top end.
Huh mind blown genius never thought of that.thanks
Works for me most of the time. Starter cord is ideal.
@@robertharkness163 yes sir! Starter cord.. pull rope is perfect
Same for doing valve springs on a old v8
I used to push rope in the cylinder through the spark plug hole to stop the piston keep the piston above the ports it worked fine. Saves taken off the head. 👍🦦
Heres tip to remove next fly wheel without removing head. 3 word visegrip chain wrench. Would lock around fly wheel so can put up against peg to hold it. I've done it lots of times.
Hell of a deal you stole it she deserves to get restored True classic there for u keep it going 💯💪🏿
Try taking the points off the stator and testing them with your meter. As someone else said the hinged part should be isolated from the fixed part. So one led to the body and the other to the wire points open you should have no continuity and if you do the nylon isolater must be buggered. 👍 Keep going bud wish I had your enthusiasm to get out and do some of my own projects!
My 78 DT 250 got submerged in river water and has no spark. I hope you figure it out so I can get mine going.
You have thought me so many things about working on machines that I thought I’d never need but now that I’m starting to work on my own I need most of what you explain. And I also enjoy learning which I didn’t even know was possible.
I ran into the same problem on a boat motor with points. The condenser wire was grounding out to the body of the distributor. Who ever replaced the points and condenser pinched the wire shorting out both of them. So I replaced with new points and condenser and the boat fired right up.
Sometimes you just have to walk away from it for awhile. Good job. I would have blew an o ring after the new coil didn't work, filled the tank with tanerite, and sent it to the moon. Great patience man. God bless
Hahah i was getting close to doing that
this bike was my first true love had a 77, i hope you can restore that old girl she could be a museum piece, just saying but when i was a kid i had to replace the points all the time sanding them would prolong but not for long i remember every time i went mudding with it i would have this problem also be sure they are set the correct distance apart upon opening good luck buddy fingers crossed for ya
Ohm stator and coil to see if they are in spec. Clean points with sand paper.
I had this exact same problem a couple years ago on a dt 100 and I was working on it for whole year trying to figure out the problem, I bought new points and a new coil. It turned out that my brand new coil that I bought was bad.
Ahh i bet that could be the problem. Eveyrhing else checks out on it. I will swap the coil again and see if I get spark! Thank you!
@@2vintage check your ground wire on the frame
One thing you can try- put your voltage tester in the coil where the spark plug plugs in and see if you get a reading when you kick it over. I believe it should read dc volts not ac but im not 100% sure
The points are self isolating if you remove wire from points and check the points without anything hooked up if it don't disconnect it the shaft on the points shorting
This is the line I was thinking, check the isolators are there and working
I think that you took the "learning" route of figuring out what happens when a condenser goes bad
Sounds like somebody removed killed switch which is causing system to ground out all the time
I'd say the stator is shot. If it's anything like a Polaris, they throw all kinds of fits when they short out.
As others have posted it appears the ignition stator coil is "shorting" to ground, have you considered maybe the stator coils are "wet" within the windings which is causing the problem (from your earlier vids you suspected the generator had been full of water) which you might be able to solve by taking the stator assembly off and putting in a low temp. oven (I wouldn't go hotter than 50 C° for fear of melting insulation) for a few hours to drive any moisture from the stator assembly and try that as a cheap way of maybe solving the problem.
mustie 1 had the same problem in one of his videos and it was the points, the insulation/ bushing was wore causing the points to ground out
Do you remember what video? I really need to see it.
@@RealDadOfAmerica i left mustie1 a message on his last video to see if he remembers. I know it was a old pull start he was working on but cant remember which one.
Points need to be Isolated with plastic on the hinge or something like that. Sounds like mostly the points are the problem
Bubba Louie always use a new spark plug when checking for spark how do you know that old plug is any good could be a bad plug it's just a good practice to always use a new plug
Hey bud, they sell a Mr. Heater for a propane tank. Works great with a fan behind it. We got a two face heater and it heats up our 2 car garage wonderful. Very well worth the investment
If your condenser is shorted out, you would have constant continuity. Disconnect the condenser and see if the problem goes away and then replace it if it does.
dude you need to buy a nylon locking plug, they thread dont the sparkplug hole to stop piston travel so you can remove clutches
i’m guessing the igniter coil or
points are knackered , hope it’s the points as they are cheap the coil isn’t
The piston has had its reed valve ports cut out the back of that piston?
Keep em coming Brother! Absolutely Love the Vids! Don't Stop!
Don't give up! you can do it!
The way that flywheel looks I'm surprised it did that much clean them points change that condenser
new ignition stator.......and get rid of all the old loom so your just left with what you need
Check the voltage on the coil.. i had a 91 blaster and i was getting no spark even though I went through 3 coils. Then I bought a good coil that went with the specs and it got spark
You’ll get it figured out I’m sure. Love your videos dude!
Do a search on eBay for "Yamaha dt250 stator" and you will see a couple for sale with hi res photos ...
Try putting lighting coil on spark side leave off lighting coil
There is some awesome pointers and tips in this comment section. Thanks to all of you that dropped the good knowledge
When you were turning the engine with the drill @10:24 it did make a nice healthy blue spark...don't knoiw how you had it configured to do that but it did spark for a couple turns...
yeah it was when I had the coil grounded to metal that wasn't the frame.
If you put an old leather shoe lace in the plug hole it will jam the piston so the motor won’t turn.
Try replacing the points and condenser your almost there don’t give up man you got this!
You should buy a few snowmobiles to fix up again !!!
Maybe change of stator? Will there be a part 4 be mint to see the running
Good video I'm having spark issues with my gz250 street bike also I feel your pain buddy,good luck I know you'll get it
Make your own wiring harness for ignition system
Yeah man, had exactly the same issue on my ts 400, resoldered all the wires, no spark, new coil no spark, the cap was faulty, replaced that no spark, the plug was also faulty, replaced that no spark, then just replaced the lead wires completely resoldered again, then got spark. Persistence bro good luck!
Are the cardboard washers intact the stator and ponts should have these little cardboard or fiberglass washers if they are bad or gone you will ground out
Someone help this guy out he is a good mechanic every one needs some help here and there love to c that bike up and running
2vintage that cylinder gasket is OEM bro lol
Keep at it brother. You got this!
Hmm, I am having the same problem. Thanks to your hard work I now have an understanding of where to begin. The pulley puller is now my challenge.
Charles
Need new stader might as well get points and condenser as well.
Dang and I was whining about it being 15 degrees here lol I been looking forward to this video thank you for the content
You HAD spark at the coil, i would think THATS where ur problem is..try putting rubber washers (isolators) n see what happens..also- get a MANUAL !!! LOL.. u cant lose when u have a manual ! 😃👍👍👍👍👍👍👍👍
Not a quick fix but you need to go through the wiring on this bike, someone butchered it at some point. There isn't a side stand safety switch on it is there?
It sounds like your kill switch is on. That switch kills it at the coil. That’s what the ground wire is for on the coil to shut the motor down. When kill switch is open it shuts off motor. When it’s closed it runs. Try a jumping wire in that connector. Then check spark?
You will get there mate
need help, i have a 01 yz 80 that has no spark but if i spam the kill switch it sparks.HELP!!!!!!
ur too under rated
Had this problem!!!! Primary coil is shorting due to age,heat, corrosion. Change that part and it will run!!!!!!!😀
I love your channel keep doing the things you do I learn so much and you always get me to come back to watch your videos
I would be checking that pile of wires and all of the wires that run next to the frame and also check the junction box wires by the air box, there has to be a wire touching the frame somewhere. I would also change the condenser and change the coil again.
Let’s go bro never new it was stater and coil for fire
Your points are grounded where they pivot thats what is grounding the whole system pull them apart at the pivot and youll find the broken worn peace of astic replace the points
I had a similar situation where the previous owner totally submerged the vehicle while it was running. Energy electrical component was shorted out. Sometimes you just have to throw a bunch of parts at it. Replace the points and coil and stater. Good luck bro. Love your content.
My rm250 did the same thing I rebuilt it and everything bought all new wiring harness but nothing couldn’t get spark tried everything but nothing so I gave up on it
I know this is an older video, but what I do what I need to stop the flywheel from turning I feed a length of a rope through the spark plug hole, which blocks the piston from coming up. When you’re done, simply pull the rope back out, usually easier than taking the whole cylinder off.
Me and my dad watch your videos all the time and he just bought me a 2003 Yamaha yz250 for my 14th birthday and we just finished rebuilding the engine
😎🤙🏻morning Joe
Sweet bike man 👍👍👍
Check world of powersports the diagram shows a cdi hooked in the main wiring harness. They also sell new lead wires for the stator. Just a thought is all. The diagrams are very easy to read there. Hope that helps.
I've been there, ready to sell the problematic bike. In my case, it was a Kawasaki G5 that ran great for a few months, then got to a point it would only run for about 20 minutes, then the plug fouled. After plenty of thinking and mild research, I found out it needed new rings (my first ever 2 stroke, and 2nd ever motorcycle). You'll get it, it'll just hit when you least expect it.
U make extra work for your self I pull flywheel s off all the time I never ever had to pull a head
Do not give up my brother. Love the channel
you could take the spark plug out and put some rope down the hole to stop the engine from turning to get the flywheel nut loose would save the time taking the top end apart
Old points and condensers can cause a lot of strange stuff. I think you should defenitely get new points and a condenser. Could solve all your issues!
After you get this bike figured out, it would be really cool to watch you do a build series on a 1998 350 warrior and put a 2005 350 raptor engine in it, all you gotta do is get a stator from a warrior engine. You can find a 98 or so warrior with no engine for really cheap, it would be cool to see you build one. I miss my 98 Warrior, I wish I wouldn't have ever got rid of it a long time ago but I had to cause I was in a bad car wreck and I had to sell it to pay bills. But it's all good lol, gotta do what I gotta do I guess lol. Hope you are havin a great and blessed day. Hope you are stayin warm up there. It's cold here in northern Indiana.
Put the stator in a warm oven for a few hours it sounds like the windings are moist
looks like its moist all over the inside
cannot figure out why you would have to remove the head and cylinder to remove the fly wheel?
Love your videos i learn alout
how cold is were your at 2vintage???
That’s pretty epic
if u just want to fire it up u can rig a 12v battery and a car or truck coil up to it and it will have spark as long as the points open and close i have done this meny times, also check the isolator shims
I would change the mag coil if you can use the lighting coil as a mag coil new points and condenser any points I’ve seen have some sort of isolator between case attachment and point itself
I think that the windings have shorted out on that side. it is worth checking the wiring diagram if all the wires are connected right in the stator. My grandpa had a bike (Jawa 350) sitting for 30 years because of something like this, also went on with replacing coils and shit that didn't help.
Ended up being one of the contacts being connected up wrong.
I think your right. I commented that he should check continuity between one coil end and the ground. Stators are wound with copper coated to insulate each winding from the next and protect it from the core metal. He's very close.
Open up the kill switch on the handle bars and check the wiring
12:45 “an extender” 🤣
Did you check the rectifier as well?
Remove the copper winding that runs lights and wiring off stator don’t disconnect wires but let it hang outside flywheel on floor so it can’t earth leave winding for ignition and points run the black wire from stator directly to coil do not use the wiring harness leave the harness unplugged if you still don’t get spark replace points and condenser check engine bolts haven’t corroded that bad causing bad grounding between the engine and frame