Seller Said " This Dirt Bike Just Needs a New Piston Ring"
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- Опубликовано: 20 ноя 2023
- I buy a 1998 Yamaha YZ125 dirt bike that supposedly just needs a new piston ring. #Yamaha, #DirtBike,
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The following video features activities performed in controlled environments by knowledgeable persons. DO NOT attempt to duplicate, re-create, or perform the same or similar activities at home, as personal injury or property damage may result. 2vintage( Joe Weber, the persons shown in this video and ANY CONTRIBUTOR, ARE NOT LIABLE FOR ANY such injury or damage. ALL 2vintage( Joe Weber) CONTENT IS FOR ENTERTAINMENT PURPOSES ONLY.
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After 4 kicks is good to say something ain’t right 🤣
He kicked it 47 times, i counted. 😂
Lol
I was waiting for the Kickstart lever to break off
Hi Joe love your videos just a word of advice from a old biker mechanic with 2 replacement knees get yourself a roller starter or make one, then you can just spin them over and save your knees.
Hardest working man on RUclips love every single video that you do mate keep it up ❤
I'm just in the beginning, but for what you paid for that absolute blast from my own personal past, even if it need an entire top end rebuilt, piston, ring - maybe not to have to split the case, but even still - totally worth the price of entry on that one Joe. I don't know how you keep finding these sweet bikes man, all these old 90s bikes were what my friends and I all had back then.. man what memories!!
Vinnie thought it was the piston rings too, also the stuff in bowl looked like it turned back into corn
🐕He thought the engine ran ruff ruff
@@snowyowl7042 vinnie knows something is quite not ok with this..lol
@@snowyowl7042snap
Now THAT is crazy! No wonder Vinnie couldn’t figure it out.
Yeah he was stumped on this one
You should contact Weisco and tell them what happened. They might want to examine the defective part to determine how it failed and give you a replacement crank for your troubles. I think it's worth a try. Another great video!!!
its a 2 stroke motocross bike thats high rung and easy to abuse...i doubt theyd even respond, especially after 30+ hrs and the wrecked cases
it's 950.00 you got what you paid for change cases new crank zoom zoom
Painful watching him Kick-start it
More than likely the crank was damaged when installed, maybe when they trued up the 2 crank halves which is done by beating on it with a lead hammer. Maybe they used a sledge hammer...
@@lionblue3449I've never seen such cornball maintenance. Kicking 50 time's obviously something else wrong. And when he said new plug could be faulty??? 😂😂 This dude. But the walk around was. Pretty Sweet dorky Dirk
I have never seen anybody kick over a motorcycle in the manner that you do, that's called the big boot quarter kick 😊
Those small displacement bikes have short strokes on the kick stater as well because the kids riding them have shorter legs.
Just insane.drives me nuts. Apparently he never reaches out and asks proper ways of anything?
This is a hidden gem of a channel! Definitely one of my favorites.
Agreed, 1) the focus is not on him but on the project 2) plain-spoken, talks you through steps/thought process, 3) laughing as I listen while glancing away only to look up and see dancing orange hands (gloves) across the screen.
Never have I had a wiseco crank or rod fail.the problem came from the installation,they probably used a vertical press and probably very poorly at that.i have literally installed hundreds of wiseco products over the years.
Thanks Joe for the great content! You have encouraged me to resurrect my old fleet of trail bikes from the 80's. Good therapy for an old guy.
I'd definitely message dude one last time and tell him thank you that you cleaned the carb, changed the gas and pissed on the front fender and it runs great!
Seller really means....This bike just needs a new engine....frame ,wheels and everything else...!!
Your videos are great. Learn a lot from just watching. It’s impressive to see the shenanigans that people do in motorcycles just for it to run instead of doing things right…
Cheers from the other side of the world!
I love his videos too, he really loves this stuff, takes his time going through everything, no better videos out there!
Tbh I didn't learn a thing, his skill level is so far above mine I just sat back and enjoyed his work 😂
I would had checked the plug first thing
Made popcorn when u were kicking good snack
Whomever rebuilt that crank used a hydraulic press with very little mechanical sympathy or common sense. And it was a budget rebuild: they didn't even bother to replace the seals for the shifter shaft, countershaft sprocket shaft, or kick starter. Real backyard stuff.
Rebuilt the crank? Is it not just a cheapy Wiseco crank?
Yeah and Cranks for these are only $125-$150 on ebay. very very cheap
I cannot imagine what happened to snap that crank at the thickest spot???
Cheap aftermarket crankshaft most likely, would of been better off putting a cheap rod kit in a factory crank
You have know clue what your talking about 😂😂.
Vinnie sniffin out the VIN numbers!
What’s up with all the dog comments
My guess would be that those bearings were damaged during the rebuild and the crank nose was cracked during the bearing installation. This lead to the crank failure after the rebuild. The bike probably didn't run after the crank failure, saving the rod bearing, but the seller probably was feeling done with it after the rebuild and didn't want to mess with it. Since he didn't replace the piston/ring, he figured that was the issue since he replaced everything else.
You are correct.The bike would have stopped running the instant the crank sheared; as there would be no timing for the spark.
We had a year old Suzuki RM125 that broke the stock crank at the same location
I see that happen on snowmobiles quite often.
I was thinking crank seal. Did not expect the Bluetooth stator. Wiseco cranks are hot garbage.
A project most of us would have RUN from. Your patience and knowledge will be tested. Keep up the hard work, sub up, view up.
2Vinny is suspicious of how much this will cost us in Alpo money. Either that or the seller had a dog
I bought a running 04 yz 450 but it looks worse than this one 💀 Maaaaan i got shafted 😂
@@RandomDudeOnRUclips 🤷🏽♂Don't know what is worse, buying something running and it fails, or something not running you know needs a rebuild - guess not running = cheaper
@@thebigguy8306 i mean, its okay, it didnt fail so far, but Overall its just had better days...
But yeah i guess buying non running for under a grand is definitely the way to go, especially if it's in this condition and you can do all yourself
Who else knew what it was as soon as he spun the crank freely?
I think they might have stressed the crank when they replaced the rod.
Usually all they need is a carburetor clean and good to go! Then you get them home and they're good to go alright!
That would be awesome, if you could train Vinnie to alert you to the problem.. like those dogs that can smell tumors or sense a seizure coming on. I think he could do it. One bark for dirty carbs, two barks for stuck piston rings, growl for broken crank, etc.
He already does this lol
Vinny!!!! 🎉😊
That is a very very common thing with Wiseco cranks they have been known to fail like that and I recommend to all my customers to absolutely not use them a lot of people say hot rods are bad cranks but I've never had a failure of a hot rods crank but have seen multiple Wiseco cranks fail in a very similar way
what cranks do you recommend? 😢
Send a pic of that crank to Wiseco. No reason for a failure like that
The reason is rebuilt cranks are not balanced properly like they do at the factories. Rebuilt cranks shake motors apart or themselves in this case. It was a perfectly good part and bad assembly that caused this. Only factories have the accurate equipment needed to ballance a crank properly.
@@andrewsock1608 I use a crank trueing stand and duel micrometers to fully balance and true a crank within .001 factory specs are .003 to .005. It does take time but once finely trued up it will be closer tolerance than factory.
There are many videos out there that show the technique. There is 4 axial points that need to be trued.
@@bradley7723 vibrations will tell if your lying or mistaken.
@@andrewsock1608 vibrations known to be from the crank are cuased by the crank not being true. For $650 you can purchase a trueing stand complete with duel micrometers . And by reading the mic and rod pin alignment you can tell if the crank webs are spaced in or out ( angled in or out) and web lineup in relation to rod pin and crank output shafts. Just by dropping a crank from several inches can untrue if it lands on one part of either web. The trueing stand is valuable and easy to learn. There are some great vids on crank trueing. I believe one of them is "2 stroke stuffing"
new video🎉 second vid i watch from you today:D
Well, Vinny was all over that engine. And when asked about it he barked. Normally, if the bike is generally okay he will look at it and quickly lose interest. But this one he kept sniffing around the engine & was cranky. He knew! He’s obviously a mechanic savant! Joe, you need to start taking Vinny with you when you buy, so that he’s in on the price negotiation. He could save you a lot of money & heartache.
This video just made me appreciate rebuilds and the people who do a good job with them sooo much more. Love the vid, Subbed and All the Best!!
I have a 2003 Harley Davidson V -rod that I broke the shift shaft laying it down to miss the rear end of a Camry … and I’ve let it sit for 2 years almost . Just because of rumors of how tedious of a repair it “Could “ be . You’ve inspired me to take a crack at it . I haven’t found a channel I like so much in quite a while . I like your style and simple approach. I appreciate that man . I subbed and hit your bell . Thank you 🙏
Keep up the vids! You already helped me a bit with your videos on my old 450 i bought... thanks man 😅
Excellent content Joe as always. Maybe just maybe you might cleanup the engine/outer casings dirty bits?
I have asked about this many times. Makes no sense to not clean the bike a little before tearing into them
Your comment will fall on deaf ears. This same comment has been suggested 100s of times to no avail.
We will see haha
@@2vintage🤣
man i move these videos. he brings us with him every step of the way. learning a lot
Never thought I would see that, broken crank?? Crazy
Anytime a seller says "All it needs it a (insert cheap part)" You know its a total basket case
Not true at all.
@@jerrywilcox9890 I would say it's true more often than not
Agreed, if it doesn't run when you buy it, prepare for the worst
I'd never put those reeds back in that bike like that , my buisness and my reputation is top notch where I live never send half ass work out the door, or sell that way .
nice honest videos,, i have a duke 390 but its good to see a lot of these videos recently and see the workings of head problems.
My friend who has had 2 strokes his whole life told me that if the crank isn't balanced or trued, it'll vibrate until it snaps.
Love your videos , waiting for a part 2 on this bike .
As always awseome vid's, the only question i have, which is driving me crazy, in you last couple of videos you have a super anoying beeping sound in your workshop :D
Broken crank is crazy! Would have never suspected that, good troubleshooting.
Keep them coming, I enjoy your content.
Using your videos during cardio just pure relaxing man love it
How it managed to have spark definitely surprised me
Ran fine the last time we rode it....... Good teardown looking forward to the rebuild!
Plugs are really a one use only, the seal beds in like a copper washer. You can get an airleak from the sparkplug too. Also you have been doing this long enough to get a ring spanner or correct socket for the sparkplug, a shifter is bad practice
Love the video. All those kicks make my stomach twist around , I've never seen anybody kick a bike that many times. Don't the racers use electric wheel spinners.
"Seller said" lol when I got my atc the seller said everything worked when parked, after seeing no brake shoes on the rear I determined that was a lie lol
Sorry it turned out bad, but it was a very interesting episode. I have never seen a complete teardown. Now, I'm looking forward to the rebuild.
Love your videos man. I have learned a lot. Would you consider doing a video explaining all the major components of a dirt bike engine? That would be a master class video
Yikes, what a mess. Always a learning moment. 😢No riding today.
That's crazy I never seen a crank do that ever either
Can't blame Vinny on this one...lol he knew it wasn't just right tho..
Maybe Joe you could invest in a used motorcycle paddock roller starter, to save yourself kicking over.
1 000 000%
love the vids bro, Long time watcher here. But the crescent wrench to take off the plug is KILLING me 😂
The 1976 RM125 sheared off the flywheel end of the crank after a couple months. All my friends raced those bikes and within 2 weeks they had all done it ! Suzuki warranted the cranks but not the labor to install them. Not a good deal and waited months for the new cranks.
foreign object destruction FOD. that hunk of gear stopped that crank on a dime, and the piston with 150 psi torqued it off. i hit a fire hydrant flange bolt head with my honda mower the AK47 of lawn care ,and it broke the crank and cracked the case, oil leaving the engine.
When you was kicking it over with no plug even through the phone you can hear the crankshaft bearing I was surprised you didn't hear it straight away, but great video love to watch these Exploratory strip downs👍
very nice video. I enjoyed the way you tackle the concerns. On my own ,i have got the same crankshaft broken concern on an Husqvarna chain saw but on the output pinion.
Thanks for sharing your knowledge!
The mystery of the fail always makes me come back to your channel which also learns us a lot of course.
Slightly misrepresented
Just subscribed. Your videos are fantastic, and really appreciated.
i always remove the exhaust as well as i once rebuilt an engine just to find out it was a blocked end can hahaha
Awesome video once again dude. I think it could be fun if u found a derbi senda or any 50cc full sized dirt bike for sale over in the us. They are very popular here in most parts of the EU, and would be cool to see you work on one of those :)
Vin figured it out right away on first sniff, but loves to see you struggle.
Yeah he loves to see me struggle lol
Just now found you and as a mechanic I'll be watching more of your stuff!
Wow. Like you said, the gunk in the carb was probably because he tried running straight ethanol. That might have screwed up the crank bearing (got no or little oil in the mix), and thats what snapped the new crank.
Anyway a fantastic channel love watching you work on these bikes 👍👍👍
I was thinking the same thing - gasoline. For an engine not meant to run on 10-20% ethanol (standard gas in Minnesota), it can be crappy for an engine. My rule of thumb for most older or small engines (snowmobile, snowblower, lawnmower) is non-oxygenated non-ethanol gas.
@@greathornedowl3644 If only you could get that in California.
Can't wait to see the rebuild. Thanks
You and yours, Have a great Thanksgiving. See you in part 2... good luck, great. Vid!!
Wow that is insane!!!! Never seen anything like that. Heard stories about snapped cranks but never seen one.
A LITTLE JB weld and you are good ... ouch... sorry to hear that ....
-Seems like a decent deal that thing is super clean!- that case bottom is such a heartbreaker. I got my KDX with “just needs a top end” and it was way more than that lol
I have a Wiseco piston and it’s been great but all the stuff about the cranks I’ve seen has been very negative
The same thing used to happen to the crank of the 1725 cc Holbay engine of the British Sunbeam Alpine in the 1960s until they rounded out the sharp cut between the crank and the flywheel hub. It started the science of crack starting fatigue.
I'm always happier when you have a seller that tells the truth. Too bad most are like this guy...
I doubt that the seller was trying to get over on him, most likely did not know what the issue was. You heard him say that he was just riding it around his grandparents property. One of his friends probably told him that it has bad rings.
But the ring needed changing... :)
I'm wondering if the gear tooth failed first, got momentarily jammed in something, and that was enough to cause shockload through the crank? Great video. I applaud you keeping a sense of humor during the strip down. mine would have been R rated!
The broken tooth came from a gear that is not in the crank case. The crank case has no openings leading to the clutch/transmission and nothing from the clutch or transmission can find it's way into a bearing inside the crank case. The kickstarter mechanism is also outside of the crank case (gear tooth)
😮😮 I’m sure glad you got this one now we have something to talk about to our friends. 😊😊When you opened it up you were in disbelief how could this happen without more damage. Can’t wait to see the conclusion. 😮😊😊😊😊
I'm thinking it's gonna need more than just rings 🤦🏾
Full rebuild incoming brother!💀💀😬😬😬
@craigmorgan4676 yup we were both right
Well at least the piston ring was ok! I've never seen a crank broken like that before thankfully! It makes you wonder what kind of abuse it was subject to. Great video, thanks! .
Wow, sheared off crank that's wack. Even crazier is that it had a spark. Love watching your videos. Sad that so many sellers are not honest.
Great video. I've only ever seen a snowmobile engine crank before, but never a bike engine. Very weird
Great video. How about a video of the reconstruction and the bike running?
Excited for the next video. I love those old YZ 125's.
I love watching these vids, Is there a part 2??
Great video. Now I have a better idea of what has to happen to do a full rebuild on a dirt bike. Do you have a list of tools you use to pull the timing/ignition section and split the case?
10:42 That is a perfect plug color for a carb. But it does look close to the edge. It looks like perfect jetting set by a pro tuner for that day of racing at that track.
He probably dropped the needle one groove.
Nice house you got there vintage. Fixing old cheap motorcycles must make good money.
Wow, I never seen anything like that before. I seen the shaft spin all together, I was like what
Airbox looks very similar to the 02 CR125/250 so check for an airbox mod kit. Stock ones are terrible and leak dirt around the mount flange from the boot to the airbox. The boot can bunch up (get wavy) and bulge out in places, allowing dirt inside.
I also had the same problem with my CRS 125 cc ICC kart engine, but on the other side. The crankshaft had just been replaced with an original one, but it simply broke off for no apparent reason.
Joe I've been repairing small engines my entire life and never seen one break like that
Those Wiesco cranks are junk , everyone if seen people use has some kind of issues
I had an 85 YZ 125 back in the day. I used to ride it a lot, nearly every day. One day,I rode it inside the garage and parked it.The next day,it refused to start. I couldn't figure it out, so I brought the engine down to my old high-school,small gas engines & metal shop class. My shop teacher found the problem in about 15 minutes. The flywheel cracked around the rivets. So my mom lent me some money to get a new one and a new piston, rings base & head gasket. It was running good as new after that. I still have an old bike, 1990 KLR 250,still runs good. Btw I've heard of those aftermarket crankshafts are sometimes out of balance straight out of the box. And I've heard of them breaking also. If it was mine, I'd probably try to find a good used Yamaha crank,and have it rebuilt. Idk if you can get a brand new factory crankshaft for that bike anymore, because of its age? Maybe some shop has one squirreled away? Good luck.
So cool watching this, he’s working on the same bike that I own. Just 25 years older 😌 I love seeing this.
Hope you’re extremely careful with NOT EVER leaving coolant out in an open container for any length of time. My friend’s dog died recently from a lick of coolant. Such a horrible death.😢
Yup its nasty shit to animals
Cats seek it out , they love it , and they die😔
That is not really true anymore, unless you are using 10 year old coolant before manufacturers were forced to add bittering agents or switch to Propylene Glycol.
@@jonathanwright5934 that is good to hear. I didn’t know they made those changes. Still want to be careful with these old bikes. I bet most of them have 10+ year old coolant.
@@jonathanwright5934 lol you must be as dumb as our law makers because you have to put something in your mouth before you know it’s bitter 😂🤣😂
I've learned from the way you approach each bike, visually, then a system by system check until you find the problem. Having experience in working on a certain type or model is a big plus, but it's not the main thing.
Oh.. and I though our kx was bad 🤣 I hope keep us updated 🇸🇪
You can use another end wrench on the open end with the box end over one side of your open end wrench creating a longer breaker bar setup
I like ace mechanic Vinny. He knows his stuff.
Basically the same bike I’m rebuilding right now mines a 2000 biggest thing is that it needed a top end rebuild, clutch plates, and crank seals. Love the yz bikes their great to work on