Seller Said This 250cc Dirt Bike Shut Off While Riding So I Got It CHEAP
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- Опубліковано 7 вер 2024
- I buy a 1996 Kawasaki Kx250 dirt bike that won't run. Let's fix it. #Kawasaki, #2stroke, #Fix,
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I enjoy watching Joe fix these machines, but the one thing about it is that there's no follow-up on what happens to them once they're fixed. It leaves people to assume they're just piling up on Joe's property. I, for one, would be very interested in what happens to them after they're fixed. A breakdown of how much he paid for them plus repair costs and then ultimately the sale of each of them to see if he either made or lost money or if he broke even would be awesome. Does anyone else feel the same way? Thanks! 👍🏻
Me to🇦🇺👍
He does have follow up videos, I think he’s got to wait for the parts to come in and work around the other builds he currently has
My guess is with all the four stroke bikes out there these days, at the track someone just poured straight gas in it not knowing about old school 2 strokes and 2 stroke oil.
My thoughts as well.. straight gas ⛽️ then boom… then the realization, “forgot the oil” so before returning blown up, oil was added as well as the “I don’t know what happened”
That's what I thought too.
Time to call LA Sleeve 😬
The fuel didn't look mixed when he tested the petcock.
Ditto, straight gas been run for a period .
Coolant lines look like every garden hose I ever drank from when I was a kid.
each of those fancy green lines added 10 HP
Dont they lol... I thought the same thing. Brought back the 70s for me mate lol
Yes, those definitely need to be replaced with coolant resistant hoses.
They are legit Kawasaki Green lines.
My guess is they didn't mix their fuel properly. Was probably really lean on oil.
Less oil = More fuel = Rich / less oil would create a lubrication problem, not a lean condition; I think Joe is right on, was running way too high air to fuel (lean) created a lot of heat and grenaded the piston. My guess is an air leak down stream from the carb.
@@user-mx6ce6vv9f Nope, it's lack of oil in the mix. Yea she was running a bit lean(plug) but not enough to cause that damage. It's pure friction damage. AND he said the locked up in mid jump, amateur rider with no throttle control over reved it. typical ricky racer over reving and constant throttle blipping
@@mazdarx7887 Your both wrong he checked the fuel it was colored so it had oil. both jets, air screw, and needle were rich especially the needle so an air leak is a bit unlikely the cause.
@@PurpleMonkeyWaffle It had oil, but how much. By looking at a fuel mix tell me how you can tell the difference between 30/1, 40/1, or 50/1. If you had the fuel and oil that was used, mixed them at varying mixtures, you may see the difference. Barring an evaporative or IR test you don't know what was in it when the piston failed. But the key is in the needle bearings. They take a while to wear out like that, not just a minute or so of overheating.
We used to race 2 smokers in the 70's and seen many types of failures, The head shows lean and not enough oil. Pistons grenade like that from overreving, too small for the bore and lack of oil.
Now on the other hand, there may have been enough oil in the fuel by not mixed to a homogeneous state(most people put the fuel and oil in a tank and shake it for a few seconds. We always put 1/4 fuel in tank, added required oil for the mix, shook for about a minute, the added another 1/4 fuel shook repeated till all fuel was in. The oil will separate if not mixed very well. It will look like a lean burn on piston, and plug, but the bearings tell a different story. Then the over reving, now-a-days you don't see it so much with rev limiters. Watch a good rider jump vs a ricky racer. Ricky racers usually wind em out in a jump can even hear the limiter kick in , but not good or pro riders
@@mazdarx7887 I would lean more towards the fuel mixture being the issue. That bike was meant to be revved in the higher RPM's compared to the bikes of the 70's. Your 100% right that there is no way of knowing what the fuel mixture is. These days, alot of the 2-stroke oils being sold (atleast quality oil) is the same color as the fuel so it is very possible this was just some person that had no idea that oil needed to be mixed with the fuel and they just threw straight pump gas in the bike.
My guess is they just grabbed the wrong can of gas.. good work joe, thanks for bringing us along.
The gas you pulled out looked pretty clear not much oil
Have you ever run Maxima oils? cant tell its mixed lol
This is why when my nephew called to borrow my six month old two-stroke, to ride an illegal spot with his idiot friends, he got laughed at.
because the cylinder was roached? or because you figured he would?
Always replace the crank seals especially when the can't be replaced from the outside. It isn't worth the gamble saying "they look good". This is definitely true when the engine has gotten hot enough to destroy the piston and upper rod bearing.
I was about to type the same thing.. Good call mate.
Not needed if you are just flipping it for profit.
@@Poppinwheeeeellllllieeeeezso your a scumbag
It is needed if you don’t want to get a reputation for flipping shit. Common sense
I'd say they ran the incorrect fuel ratio or straight gas.
I'd also replace the rod and bearings since you're in that far.
every video of yours I pray for a difficult one for 2 reasons:
1 - is what makes me watching
2 - because I know you can solve it
Wonderful isnt it? Kids got some skills, thats for sure. Has helped me a Lo9t already, been watching him since he had like 20k subs. I always learn Something from is videos, worst case its same thing but Drills the problem solving steps in for good and others a Whole new can o worms :) Cheers.
So much suspense building since you are checking the top end LAST!! 😅
You'd think these jobs would be hard enough without taking off everything everyone already knows isn't the problem.
unreal the money this kid has to buy all these bikes and atvs and never has to sell nothing!!you tube is great!!
Lmao he sells a lot of the bikes on the channel and buys more to further the content. You really think he’s just fixing these and keeping them? 😂 he has a couple of older videos of what he’s actually kept. Mostly rare or vintage stuff
My brother had a vertex fail like that in his yz 250 at 40 to1 all the factory jetting and stock pipe
I always change the top-end bearing with a new piston, they're kinda fragile. Wauw that piston grenaded. Sorry for you for having to rebuild, but once again a great video. Big Up!
Yes you dont save 15 dollar on that bearing if you change piston.
Great watching you strip down the 1996 kX 250, looking forward to watching you rebuild it, wish you lived near me, my 89 cr 125 hasn't been fired up since 93 ( walsall England )
"Hear that" - when you know something is seriously messed up and it's going to cost money 🤣🤣🤣
Hahaha
Where'd you get it bud😮😅😊 0:26 @@2vintage
I don’t think you’ve ever lucked out with a “lock up”; but great content for us 👍
Chances are his friend ran it with straight gas but if you git that thing up n runnin it is an absolute ripper!!! I bought the same bike for my Daughter n that thing is a lil monster with power everywhere!!!
Now I’m leaning towards the crank sounds pretty deep when you rock it back-and-forth.
That sound off sand from the gloves when he hold the crank make me twist. You do a great job But plz listen to the 5000 comments wash Your engine’s
Lol...
You're basing the lean running on the grey coloured spark plug. I would suggest the plug is grey due to the aluminium dust created when the piston failed. Apart from some discolouration of the con rod, there's no other evidence of hot running. The oil appeared to be silver grey too, suggesting it was contaminated by aluminium residue... though how it would get to the gearbox I have no clue! This could be a simple case of piston failure.
grey is the colour for oil after been used in a wet clutch
@@empiresrikesfat you need to change your oil more often!😆
Usually with a lean seizure you would get lot of metal scooped out of the piston crown, My guess would be someone put straight gas in it.
100% not mixed fuel !
Shame , the KX 250 is a lovely bike.
Be hard to source a cylinder for that for a good price.
I think the seller ran straight gas through it, then put mix in it, only way i could come up with
Joe, I've done this for YEARS. Believe me when I tell you that you need just a few more things to make your job exponentially easier. #1 - bench vice #2 - parts washer #3 - electric grinder/wire wheel. I'm sure I'm missing a couple of lesser things, but after using these few pieces of equipment a couple of times, you'll never know how you got along without them for so long. They're that worth it.
A vapor hone would be nice too
Ultrasonic bath cleaner is perfect for carbs....
@@harrybosch5720 He has one.
A Handy motorcycle-atv lift table. Get off the floor
@@harrybosch5720 He has one
I would send the cylinder to Powerseal USA for $254 plus shipping both ways and get it fixed right. No sleeve and no buying a $650 cylinder off ebay.
I never give up on a job no matter how bad it is, in this case I would have gone straight to working on wheeling it down to some guys garage at 2AM ......some guy I just don't like preferably and then sneaking back home. Job done.
I just bought a 1994 yamaha xt350 and the seller said he was rising and it lost compression. He said he installed a new piston and timing chain and still no compression so I got it for $450, got it home and this thing has stripped cam bolts and broke bolts on exhaust. Has 2 bent valves,original piston original timing chain, and bad wrist pin on the rod side. Loving the honesty. ❤
I always put a little extra oil in my mixed gas. A little bit more smoke is way better than forever rebuilding them. 2 strokes don’t need a lot of warm up time, sitting idling is what carbons them up. Even using a little extra oil I’ve never fouled out a spark plug on anything.
More oil means less gas through the jet that makes a lean mixture
Millenium Technologies can fix/replete the cylinder.
You cannot reuse that rod, the crank has to be rebuilt. The rod itself is the pin bearing race and that bearing was shot. You also have debris in the lower bearing no matter how much brake clean you use.
Hopefully he listen to you but doubtful he will.
Comon man this is joe dirt channel no way he gonna fix it right
He wont listen lol
He's in Wisconsin where millennium tech is.. he knows 🙄.
@@thyreaper650 let him spend 600 instead of 300
I have seen to many times where a bike is not warmed up enough and get the famous cold seize..Very important to do.
Yes I always warm my yz125 2003 an run 25.1 gas mix
That is not caused by overheating I made my first comment before the cylinder was pulled off and that looks to be like too much clearance banshees are bad for doing that if you have too much clearance they'll break a piston skirt on the intake side so being that the exhaust side isn't all messed up that wasn't caused by overheating It's either detonation cause the piston to break which it can do or there was too much clearance for the piston and it just rattled back and forth till it broke the skirt The reason it'll break on the intake side if it's too much clearance is because that's the on the upstroke for its compression stroke that's the stress side of the piston that's the side of the piston that all the pressure is put on as the rod transitions to going back up there's always a little bit of side load on the skirt so it was either caused by too much clearance or detonation
I read some comments, i like the idea of straight gas in the tank. my first thought was crap carb, leaned out and killed a fresh motor.
Mate while engines out tidy up the frame just with rattle-can blow it all in
I wonder if somebody put straight gas in it before they rode it ?
I wonder
That !?! or it was running without coolant lol. Who knows 🤔💯
@@just4kicks950 no I seen the coolant be drain there was coolant in it
@@MusicSensations1971 I seen Joe draining the clean coolant in the vid. Doesn't mean there was coolant when it blew. Maybe the person who did the build forgot. Seen a few come threw Honda service that lost coolant or someone working on forgot to add coolant, to do that kind of damage from heat ♨️ . Just a theory anything can happen, it's 2strokes life lol
That’s crazy. If you ever do merch, put me down for a “That’s Crazy” t-shirt.
"Looks Perfect !!" I'd buy some of his merch, as well. Hoodies.
I dont even ride dirt bikes anymore & I love these videos. you do a great job, thanks.
The grey plug would tell
Me pri detonation .. woodruff key went and timing got way advanced.
Love your videos! I’m guessing the piston clearance was way off. Cylinder is probably worn out and the grey plug is all the piston debris. Don’t believe it was running lean. Measure the cylinder. Good luck!
Bro, engine teardown and rebuild videos are my ASMR
I have a feeling what saved that case from total destruction is this: He said his buddy was in a jump and it died mid-air.. I'm thinking the lean mixture and all the stress had that piston swollen like a whale about to give birth, she blew on the inside when a little throttle came off and there was no more pressure on the chain from ground contact being lost, she gave way, blew and froze solid with the back lower section of that piston wedged between the crank and the case. THAT saved it.. he probably came down threw it in neutral rolled off and that was that. If it blew at full throttle on the ground, she probably would have showered the track with oil and that case would have been done for. Lucky.. It's no biggie for you though Joe and it'll be a SWEET bike when you're done. I recommend putting a Mikuni carb back on it though... people stop with the junk from scamazon on good old bikes like this..
edit: so the carb does check out, but still.. you really should stick with oem Japanese parts if you can
yup no input from the rear tire being in the air saved the cases! And for people enough Amazon carbs! There's a reason thet're 30.00!
joe those front forks are pushed up way to high in the tripple clamps should only be between flush and 5 millimeters. never seen anything like that.
Joe, just my friendly two cents… When you have a major and catastrophic failure like that that locks the motor up while running hard, you can't just spin the crank bearings and look at the crank and just say "well that survived. That's good to go"!! That is a lot of momentum/inertia coming to a halt in a hurry. Unless you're doing it off screen and I don't know about it, you should probably be checking that crank for "index" and obviously every crank should be checked for "run-out" before reassembly. I've never seen you check one for "run-out "set up in crank blocks with an indicator. Maybe you're doing it behind the scenes. It's so hard when you don't know the full history of the bike. Maybe that piston was slapping around in that cylinder banging those skirts like a square dance on a Saturday night in the barn?????
As soon as you pulled the cylinder off and saw that piston I was speechless.
Whats strange, is how everything was set to be rich, makes me think they were having problems with it running lean and didn't sort the problem fully, before running it hard.
I’ve been away so catching up on your videos.
This really looks like it’s been run without 2 stroke oil.
But I think you got lucky with it. That kind of failure generally ends up with cracked cases.
Looking forward to the next one on this bike.
This is the only mechanical series I never fast forward, thanks for the great Contant, my friend
Either fuel mix or possibly an air leak from the crank seal or intake boot, I've seen the crank seals leak on the older 2 strokes quite a bit.
Those knockoff Keihn pwk carbs are usually pretty good actually
@@JoeTheBlacksmith13 Yes, I had a good experience with using one but I replaced both the Jets and the needle.
I wonder if he was running gas with no oil? Also I'm thinking with the plug being gray like that maybe that was metal shavings covering the plug, you know, not that it was lean but just worn down ring got up in there, and I'm thinking the gas may well have been without oil - or the piston just shit the bed and that's how it goes sometimes.
Wow that thing was super detonating I bet you could probably hear the pinging in the engine it had to be so severe
Damn Joe a Greyhound bus can drive through that piston ring Gap !
You are the doctor.. love what you do.
I'd guess the bore was out of round an the ole piston slap got it.
Great work you do and great video. Once you get that top end corrected with new parts should be a sharp running Kawasaki 250 !
White plug is a lean, grey is aluminium and oil/fuel mix. I think its called death ash. Piston looks to be la sleeve forged piston. I bet he just forgot to add oil. Cylinder is repairable too, some companies might not provide that service though. You weld with 4043 welding rods, then rebore to size.
You should turn it into a big bore KX301cc from Kustom Kraft, that way you might be able to reuse the cylinder. They list the price at $650 and are located in Las Vegas. Good luck.
I had a 96' KX125 Split Fire addition! It was a sexy bike!!
Lean on oil and possibly an air leak at a crank seal. Gray on the spark plug was metal deposits. Pressure test after you reassemble to make sure the case and head is sealed.
Vinny didn't do a pre-inspection before buying!
Bro your text tone has been the same for so long 😂 I respect it
Hey, nice video. That piston is exploded. They should pay more attention to jetting the carb and the needle position. There are a bunch of sites with jetting setups.
Also, I have a suggestion: try not to use PZ bits on Philips screws. Pozidriv (PZ) uses different angles than Philips (PH), and you can easily strip the screw head if you are not careful enough. Some old Japanese bikes use JIS screws which also look like Philips but in the middle, there are sharp corners instead of rounded ones. JIS screws are usually marked with a dot.
Happy Days Joe Has Posted 🔥🔥🔥
Great work Joe, to up your game I would use a brass drift and engineer's ball pein hammer, not the builder's claw hammer and socket extension when tapping out those long bolts. Impressive skillset you have.
$ 1,200 purchase. $400 cylinder repair, $300 crank assembly, $160 piston kit, $ 40 gasket kit. I'd say your profit is gone on this already. 😢
Pretty close my area they still bring 2200-2500
@@TroySmith-cz5jy oh, well. I guess we don't count 🤷 the money from half a million UA-cam subscribers watching his channel because he does the tough repairs. Sounds like yall have it all figured out.
They're $2500 in good condition. This bikes had a rough life. It'd be $2k running where i live.
Ouch, I'd say that was more like a 400 dollar bike. I don't make content so I can afford to walk away from bikes but with the description from the seller, I would have offered very little for the bike. Makes for good videos though 😂
I've seen this on a very expensive '90 model, was new then, owned by a wealthy racer. I'll agree the fuel didn't look mixed. Other possible causes would be somehow missmatching the topend or a defective piston. In the case of that '90 I mentioned, well. Hot Florida weather and not resting the bike for an entire day of riding. When one rider got off another jumped on. Very, very long and straight dirt roads at full throttle, all day.
Probably was at a party and reving it red hot burning rubber red hot pipe ect until it broke. Put a new back tire in and sold it
Get a real cheap borescope and look down the spark plug hole. Also, pull the pipe off and take a look at the side of the piston. Lots of good stuff you could be looking at before the tear-down!!!
And remove carb and Reed cage to look at piston
YES! And for Pete's sake start measuring your piston to cylinder wall clearances when you put a bore/hone job on something and just slap in a brand new SeizeCo forged piston!!! 😂😂😂
I hate to be one of those guys tellng you what tools to buy.. but an exhaust spring tool is super nice. I used to use a vice grips as well until i used a spring tool.. night and day. Thanks for the vids n the great narritive you do bud.
When I was around 12-13 I had a Kawasaki 100 and a friend of mine told me if you mixed rubbing alcohol and baby oil it made an cheap form of nitro fuel additive, so I mixed that with about 50% fuel and it ran great for about 5-10 minutes until the piston melted to the cylinder. :(
I seem to recall as a kid using vegetable oil at one point. Lovely smell but catastrophic is an understatement 🙄
Just bought a 99 that had 225 lbs of compression and a horrible knock. Someone took too much material off the head way too much squish. My wrist pin bearing came out in double the pieces yours did 😂
Hiya, I run a few strokes and a couple of tuned ones...it .oops exactly as you say. It's run weak and overheated. I didn't see the air cleaner. I would consider doing a crank case pressure test when the crank and seals are in. On my bike the cylinder studs are usually at fault but I've seen many different leaks from porosity to case cracks. As you've nothing definite to see I'd consider it bud.
No way of knowing if there was an air leak on a torn down engine if not obvious without performing a leak test prior. It very possible the afr was off. There was oil in the bottom of crank case indicating premix, but who knows what ratio. Not sure what piston kit and wrist pin bearing was installed but the china carb is an indication. I believe the piston grenaded due to too much cylinder wall to piston clearance. A proper measurement using a bore gauge would help determine that. There are many factors that likely contributed to the end result.
I’m guessing you weren’t actually running lean. I’ve got a feeling that it’s probably just a cheap piston. And what you saw as gray on the plug was piston material.
Hey Joe, keep up the amazing content, loving these videos. Inspired me to buy and old 2009 Husqvarna SMR 450 to do a rebuild on. It needs a replacement head gasket, cooling system is over pressurising. I will change the piston and rings at the same time, from your experience which piston would be best to go with? Athena, Wossner, Vertex, Pro-X….? Cheers
How could you tell that the head nuts were torqued down if you didn't check with a Torque Wrench?
By 20:35 it was obvious that the crank had gone. What a pity, that engine looks perfect inside.
Ive replaced the crank and piston in this exact same bike. Its a fist full of power when done and dead wallet even when getting the cheapest
You could say that the piston is half gone or better yet, the piston is half there. 😮
I'm a big fan of your channel Joe, but I've never owned a two-stroke dirt bike. Please explain how the power valve works to produce more power
Is there some kind of vortex that it creates or does it increase compression as RPM rises? Great video, you can fix it.
If you ever go to look at anything in central Minnesota I’ll go with and be your official haggler! 🤣 it’s not as scary as you think to point out a few flaws and throw a low ball offer at someone and see what they say. I rather enjoy making the deal as much as fixing things. When they don’t run you can never get them too cheap because you just never know what you’re getting into 👍
Someone mixed the gas wrong and it should be 32;1 that's what the manufacturer recommends
If they mixed 40:1 would 8% make that much difference?
@michaelesposito6678 yes if you look it up they have done study and the more cycle oil used the longer the life of the piston and the rings and longer compression more too
my guess is it had an air leak from a gasket. someone knew it was lean and tried to make it richer but not enough. you need a leak tester for testing 2 strokes.
You Sir have an amazing knowledge of multiple bikes
Put needle clip in the middle so it'll hit a happy medium.
That is pretty lucky those cases didn’t crack man! Wow!
I've had a liquid cooled outboard and liquid cooled snowmobile both run out of gas at high throttle and lock up both motors. Maybe something in running out and somehow leaning out the mix ....
gotta be chunks of piston and bearings in the crank case or a broken rod with a piston seized at BDC.
update after watching the whole video I dont think it was running lean the grey on the plug is aluminum. My guess is it had poor fuel which caused detonation eventually breaking the piston. Detonation is like smacking the piston with a hammer every time it fires. This is more common now with ethanol fuel which has phase separation after short time of sitting. I've seen multiple snowmobiles and dirt bikes come in with this exact situation.
I would be tempted to change that filter in the fuel filler cap too seen them fail before
Did the same with a vespa was ringing its neck for ages hope u get it sorted 👍
I can't believe all these parts are non existent. Mid 90's 2 strokes were some of the best bikes.
They make parts for 20yrs. aftmkt aftr
@TraveladvRajanSRai this is a 96. Almost 30 years old. But still a popular bike. Cylinders are expensive and other parts are getting hard to find. I don't get why aftermarket wouldn't step up since so many of these are still out there. I was going to buy a cr250 to rebuild. The parts were going to cost more then the bike would have ever been worth. That sucks.
Amazing neither case cracked with those huge piston chunks in it, hey at least it`s only top end.
Ol' Joe loves his dirtbikes. Good looking rig, now let's tear it apart. 😭But I wanted to go for a ride today! Did I miss 2Vinnie time? 🤔Mantra, a cheap bike surprisingly expensive
When taking foreign material out of an engine always check it for magnetism. Knowing its magnetic is good info.
May have gotten too much air from a cracked boot or air filter wasn't on all the way. Or premix wasn't right.
I'd throw out the cheap carburetor for OEM, even if it was full rich quality on these are poor.
While the crank seemed ok, it's a gamble to reuse it when that much metal made it into the case. Imo
Friend probably put cheap gas station, boat 2 stroke oil in bike,off the shelf next to cat food.
2 stroke oil designed to run in cold lake water temps,not hot dirtbikes.
Piston started dragging, till skirt fatigued.
Might explain gray on sparkplug. Cooked 2 stroke oil, designed for cold water applications ?
You can hear the crap in the crank bearings as you spin them, for the cost of them they should be changed along with crank seals. Crank is toast if the small end broke up it will have damaged the small end of the rod. Needs new rod kit, new mains, new crank seals. Cylinder would weld and replate so along with new piston and OEM carb it will be good to go. For the low cost of bearings etc you would never re-use them it just isnt worth it as one bit of missed debris will mean it needs doing again
I had an old outboard I bought that had almost the same failure. Found out the old guy put in unmixed gas.
I’ve had several over the years with the same damage and worse due to failure to mix oil with gas! At least in my case the sellers were honest in telling me they ran straight gas in a two stroke.
My only guess is no 2 stroke oil, but maybe a tiny amount. The jets showing rich, the needle in the rich position. It would almost have to be very little oil or a huge air leak which would have showed up. No mystery that a lot of people play with the oil mixture they think adds power. It could also have been nitro-methane fuel like for maybe the guy had a wonderful supply of nitro-methane he just couldn't pass up.