How-To: Unseize a Motorcycle Engine
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- Опубликовано: 9 июл 2024
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Marvel Mystery Oil
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Mityvac fluid extractor
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Turkey baster
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Allstate coolant change video
www.allstate.com/blog/change-... 
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Here are the link to products used in the video. Make sure to check out the Allstate video:
Marvel Mystery Oil
amzn.to/2WzLeGl
Mityvac fluid extractor
amzn.to/2WDj7WM
Turkey baster
amzn.to/2Wy5KCd
Allstate coolant change video
www.allstate.com/blog/change-motorcycle-coolant/
Mate put it in second or third gear and bump the back wheel back and forth by hand also take rocker covers off make sure cam bearings not sticky also bet clutch plates stuck together be careful with clutch centre fragile lol seized two strokes take head off put bike in gear and rock back wheel the pot goes up and down on con rod bumps up and down on studs same with really sticky four strokes (make sure you secure cam chain or monster build lol 😀 )
@Frank Blackcrow Marvel Mystery Oil is available at every parts store here in the US. I have used Diesel Oil to clean out an engine, but I haven't used it for this application.
Very good video. I didn't think many would know about this trick and additive used that way. I learned it from an old school master mechanic. He always started with MMO, then wait at least 30 minutes and crank the engine (using battery) without spark plugs but instead have the engine compression tool connected to measure the compression. If any of the engines were lower than factory defined spec, then drop a bit more MMO and wait at least another 30 minutes before trying again. He would move on to using PB Blaster if the 3rd attempt failed as well. PB Blaster is a more aggressive additive which could be used on severely seized engines. It works faster than MMO too. I poured an ounce or so of MMO twice while waiting 30 minutes or so in between and nothing. Switched to PB Blaster and sprayed a second or so into the cylinder that was barely getting 115 psi on one of the 4 cylinders on my 1987 Honda Magna (and waiting about 15-20 minutes afterwards), it freed up nicely, all got about 185 psi
Important points: 1) Use a new/fully charged battery for compression testing
2) Keep the cranks to no more than 6 hits (which by then the compression should have already achieved its highest pressure)
3) After about 5-6 sets of cranking, it would be best to check and charge the battery, if needed
Regardless of what additive was used, once the cylinder frees up, you wouldn't want to continue running the bike like that (obviously). It is time to do an oil change + new filter!
I am also a proponent of Marvel Mystery Oil and do things very similar, except I don't use a ratchet on the crank. Instead, I pop the MC on the center stand and put it in 3rd or 4th gear, get behind it and slowly rock the tire back and forth until it spins free (always being careful to not hang up a ring ridge). Once I have went two revolutions, I am fairly confident it is good to go. Great explanation, sir!
Fan of MMO
Hi, how would you get the MMO out of the engine? Would you crank the engine and it would come out through spark plugs?
@@SuperAmoney2000 Some of it shoots out of the spark plug hole via compression. The rest you can just drain via the oil drain plug when you give it an oil change! Thanks for watching!
@@vintageyamahabackyardresto4995 I’ve had my MMO in for almost a day with no change in the seize. Hoping to help and back it’ll work.
Seems like it would make sense to lift the front end a little to level out the cylinders and provide more even coverage. Might give the oil a better chance to find its way down into the cylinder. Just a thought.
I am amazed at the amount of good engines that seize up from sitting. If I let my engines sit more than 6 months, I will put Marvel Mystery oil in each cylinder, and plug the intake and exhaust. I will go back to the engine years later, and roll it over and put more Marvel Mystery OIl in it so I never have to unseize one or take a chance at damaging it by breaking it free.
Going to be doing this on my bike tonight. Just bought a 1986 Honda Vf500 Interceptor and the pistons are stuck from it sitting since 2013. Will probably have the bike sit for a week and soak
Great video sir. I've done this before with V8s. I use ATF mixed with Marvel Mystery oil.
Great video bought a 4 stroke 125 ttr from a police auction with a seized motor followed your advice and it worked thanks
Wow man your brave are you still alive?
Glad to hear it worked out for you, too!
Thank you sir I just repaired a 2 stroke engine siezed it was very useful
Did you do it the same why he said?
Excellent video. Getting ready to apply your process.
I JUST PICKED UP A 1983 KAWASAKI GPZ 1100. SITTING FOR A FEW YEARS. BEFORE I EVEN TRY TO START IT IM GOING TO FOLLOW THE DIRECTIONS SET OUT IN THIS VIDEO. THANKYOU MATTY
In my 1999 Kawasaki ninja manual it tells this same procedure to get it freed as well!
Good video, thanks
Thanks man I've bin standing on the kick start 4 days
Great video very helpful to my cars. Thank you
I successfully unseized a 78 cb550 with the Acetone/ATF 50-50 mixture doing this. It took 5-6 days of soaking. I slightly loosened the oil plug. After about 4 days there was a slight drip but one or more pistons were still stuck. I added/fed more of the mixture the next two days. Using same approach here, came free.
Good tip on oil drain plug. That tells you the mix is seeping in.
I have a 2 stroke motor that has been sitting for a good while. Can I dump diesel fuel in the crank case and let it soak to break down all the gunk?
@@edwardwilkerson5790 Diesel may be too harsh on crank seals. Use marvel mystery oil. Remove spark plug, reed cage, and pipe. Put piston at TDC and fill it up.
Hi Fezzler. Why loosen the oil plug? Do you drain all the oil before doing this so that you can see if the mixture is coming through?
@@conradpaul6100 Yes. I drained the oil. The loosening oil plug was so ATF/Acetone mixture added to top could drip drip drip flow to bottom. I guess I thought movement/agitation would be good.
Sounds crazy, but I used CLR and it worked quick, but needed a good flush out. 1986 Yamaha BW80. Was basically a boat anchor. Calcified stuff and rust in the crank case, as well as the carb. Good thing the top end parts are cheap. Now focusing on the clutch.
Nice! I just bought a gz250 with a seized engine so ima try this out! Thx man 🤘🏼
I just got a 1977 Kawasaki KZ1000 in my engine is locked up. I'm using a 3 and 1 lubricant and engine oil. Because I don't have transmission fluid but if this doesn't work I'm definitely going to try marvel mystery oil I never thought to use that. I know anything lubricant base will work just about. I have on seized a go-kart engine with regular engine oil and transmission fluid mix and it worked great just slowly but surely work the engine shaft back and forth. I've been working on small engines for over 10 years and I never thought to use marvel mystery oil thank you for this advice
Best video about this on here
Great Video. Thank U.
My 2006 ex500 sounded like it started firing on one cylinder while riding I stopped it then cut out and wouldn’t start again, i think put too much oil in it. The left cylinder is hard to crank over but when left piston is down the right one cranks no problem( I have to do this manually) the electric starter isn’t strong enough to turn it over now. Please help
Can a motor that was fine all a sudden lock from installing the nut on the magnet? I reassembled my bike but maybe i screwed up because i lubed the cylinder with wd40 to get the piston back in and have not done any fast turning just turned it by hand and it was fine then today when i was preparing to start it i found it only moves about 1/4 turn either way then locks what the heck is going on?
So I got my Yamaha VStar engine unsiezed just like you should how to. Now what is the process to getting it to run because I’ve done everything in the video and it’s unlocked but won’t start it will roll of once but won’t catch. Does it need to be in a specific gear? Or do I need to give it movement while I try to start it? I can’t figure it out and no one has a video that I can find.
Great video bud
I have a 62 flathead which haven't started in years would u recommend this??? Thank you
so do you want to put the spark plug back in after putting in the oil or will that harm it? also i put regular motorcycle in after taking out the spark plugs did i screw up?
thanks for the info.
Never seen additives used like that. Interesting video, thanks for the advice 👍
No prob!
Have you ever tried using Seafoam in this way? I'd be interested to see the results using an inspection cam before and after. Have you tried using these additives in any other way? I'd like to see more videos on this!
@@fgcvhhbvjhbj Seafoam will probably evaporate? I have used seafoam to decarbon an engine etc...
I cant share it with my riding buddies because im a lone wolf. Just so were clear on that. Thinkin of gettin like a patch and all just so were all on the same page and i get the propper respect
This is so cool I'm the exact same bike with the exact same problem I believe
Hey there, trying to do this on a 350f. Let the MMO soak in the cylinders for a week and a half then popped the side cover off. It's a bit of a disaster in there with rust and corrosion. When to rotate that bolt clockwise. Got it to turn once and some MMO came out the spark plugs holes. Went to rotate some more and now it seems like the bolt wants to turn but not the shaft. Thoughts?
do not try and unseize the motor by turning the points rotor bolt .... put it in top gear and rock the bike back and forward and if you have to turn the motor any other way go to the flywheel side and put a strong bar on the flywheel you will see what I mean when you look at it ..DO NOT put a spanner to the flywheel retaining bolt..... and don't use the starter motor as you may wreck your starter clutch and if that starter clutch is on the inside of your crank case's then it's a motor out and strip down to fix
Thanks man, looking at buying an XS500 with a seized engine at the moment, will give this a go if i do, thanks!
You will definitely have to free the rings only top end rebuild well worth it 9 out 10 times they stick if the rubber cv bit perished when you do the carbs smear clear mastic good temp fix until you can find replacements clutch plates probably stuck two clutch centre very fragile and very expensive be careful lol
Does it have to be marvel mystery oil or just and penetrating fluid
I've done evapo rust as well
Hiii.. My bike too had a problem to yamaha fzs 2013 model how much it costs for do it. Can u tell me bro
I just dragged my beloved 87 Honda 200X in from sitting outside for like 15 years (cuz I'm a piece of trash) and I was horrified last night when I realized the engine was locked up. I started "googling" to see what fluids people were using with success and I'm really glad to have found this video and this channel. I've been using PB and that Freeze w/e spray (which I realized isn't ideal due to the moisture). Marvel Mystery oil has always been very much "beneath me" but I think I'll grab my turkey baster & give it a whirl! Great video!
Let me know how it turns out!
Im interested in buying that 200x if it for sale I have a 86 200x
@@kevinplourde9701 No. But wishing you Good Luck with your 86! #RideRed
@@makaveli087 did it unseize?
@@camomoto2544 probably never did run again
I think I overfill my engine oil. Able yo use for few days, then now it will not turn, just that one (crunch) sound. Not even clicking from starter. Did my engine seized?
Will this work on a 150cc dirt bike, a regular sized dirt bike
Will this method work on a 2012 Honda Ruckas ?
How many miles did this have when you disassembled?
It did ... it did make a mess ... lol it also worked... do i have to clean the mystery oil out now?
Are the rings, piston, cylinder shot at that point?
What size socket did you use
i poured regular motorcycle oil in the piston will that work?
Great Vid! Appreciate the efforts. Did you leave the remaining MMO in the cylinders or remove it some how?
Once I got the bike to fire, I drained the crankcase (and all of the MMO out of it).
Will this work on a 150 cc dirtbikw
What you have to watch out for on the CB750 is, the oil jets in the barrells can block up and starve the top end of oil, the cam runs in the head, no bearings, so you must check that there is oil reaching the top end.
Another thing when starting one of these after a while is make sure to soak the cylinders down good first. The pistons are aluminum and an oxidized cylinder will scrub that piston real quick.
Does this work for 2001 zx6r?
This will work with dirtbikes?
Great video,, now i can unsieve my motor..Thanks
I have a pit bike I just bought that’s been sitting with the spark plug out and it’s seized really bad because of the rust. I hope this works
Did it
My yamaha TTR-50cc has been sitting for a few yrs and I pulled out the spark plug and it has rust on the inside. I then dipped the end of a zip tie in and it came our covered in bits of rust. Do u have any suggestions to get it unseized. I've tried pushing the bike in neutral then kicking it in gear trying to unseize it, have done this many times but the wheel just locks up.
Start soaking it with marvel mystery oil and walk away for a week.
I just bought a crf150 for 1000 did this and it runs now I can resell and make a ton or just keep it
Wow - good job!
What should I do I been working on my
Bike it’s got oil but no gas or coolant ? It seize from seating down that’s it !! :(
Hi Matthew. Nice video, well done. We don't have marvel mystery oil here in South africa, can I use some 2 stroke oil instead?
Try a 50/50 mix of acetone and trans fluid.
@@HTMR auto transmission fluid?
First time watching ratchet used on the crank interesting though
May be a silly question but how do you then get the oil out of the Cylinder?
Cycle it without the sparkplug
What do you do after you get it unnseized? Full rebuild? Clean out all oil? How to clean oil out of spark plug holes?
All you’ve gotta do is a full oil change. I’d just let you drain plug stay open for a few extra minutes and would also buy an extra quart of oil to run through the while the plug is out, works similar to an engine flush that way and gets residue from the MMO out.
question (and great video btw!!!)...I was gifted a '77 yamaha LB50 scooter, and wondering if I could just shoot some liquid wrench into the spark plug hole? Sorry, kinda newbie here, but I DO KNOW not to try and kick it over!
Do the basic compression test to see if it’s locked or not bud. If it’s a scooter with gears put it into first push yourself down a slightly angled hill and before you get too fast to stop on a dime let off the clutch. If it doesn’t try to move forward and just stops you in place it’s locked.
diesel works great for penetrating oil
I've Freed up engines like that and ran them just how they are several times. You definitely COULD have fired it up. Lol
Can you rebuild my 2006 yz250f ?
So I was rebuilding the top end on my bike, and I was moving the crank to make sure it was going right and then it just locked up so would I just put the oil on the crank?
It’s probably bad crank bearings that happens a lot on dirt bike especially two strokes
Do you think that would work for 2007 gsxr 750? It’s seized when the oil drained out.
No, it's time for a complete engine rebuild.
Engines seized due to a bit of corrosion in the cylinder isn't the same as a piston 'welded' in the bore due to massive heat. Honestly, unless the rest of the bike is immaculate (or sentimental value) I would just strip it down, sell the plastics etc. on ebay and put the proceeds towards a different bike. Unless you plan to rebuild it yourself, wrench time alone will cost more than a 13 year old Suzuki is worth :(
Plain old Diesel works wonders
Diesel Its magic
I've heard Coca-Cola can work (but I've never tried)
Would this work for a Suzuki dr 350? My bike randomly seized up .
No, damage it done. Open it up.
What would I need to do if the crank shaft bolt spins? Previous owner tried to free it and didn’t wait.
Love this video but this guy doesn't respond very well I'm still waiting on the same question you have. Mine moves freely so I assume it's damaged but I don't know.
Sounds likes it's stripped out the bolt probably have to tap the whole and use a slightly bigger bolt
using my grandpas account to ask this, would this work for a bike (1969 Yamaha 305 big bear scrambler) that was missing the left side oil tank and went through a 6 feet flood and then sat for 13 years?
You will have to take the whole thing apart if it was flooded.
Some of the mystery oil came out of my air pod filter that's attached to the carb... Did I do something wrong???
No it will come out of exhaust and intake.
Dude you just made me save 200$
When you do this should the motor have oil in it or not
Doesn't matter since oil pump won't be pumping.
I am looking at following this process for my cb550. If it was stored without oil, would I be ok to just add oil and then follow your process, or is there something else I should do first?
Do you plan on rebuilding the motor? If so, break it loose and tear it down. I have top and bottom rebuild videos for that model.
@@HTMR yes just top end. Just adding oil is the only extra step required given the circumstances?
Thanks, will definitely be following your videos
@@duvis9 Adding oil to crankcase is not going to help unsieze it, since it just drains to bottoms. However, you don't have to drain oil to do just top end. So add it now or later does not matter. Just put a piece of tape near key that says "no oil" so you don't start it up dry LOL.
@@HTMR awesome. Thanks for your help!
I have a yzf 450 backyard racing bike I didn't go on it bc it sezed up
After letting it sit do you try to loosen the nut gradually with bike in gear or neutral? It's been about 10 hrs since I put mystery oil in the cylinder so I'm asking in case I'm still stuck. Your feedback is appreciated
With nut on engine neutral. You can also put it on top gear and try to rock or spin the rear tire.
@@HTMR listen my guy I wanna say thank you very much. I noticed its been a couple months since this post and doubted your reply... I'm now a believer and will subscribe. Thanks again seriously.
@@poloswag2011 No prob
Left it sitting for a few days with penetrating fluid and nothing changed. Any ideas why? My dirt bike has been sitting for awhile.
Put it in high gear and rock back/forth.
Your dirt bike piston is probably seized for different reason and not just rusty rings/wall.
This is not on topic but I have been trying to get to you. I am trying to purchase your vapor blasting info but can not get it. Please let me know what I have to do to get it. I am ready to build. Thank you.
Do we know what the Europe/UK equivalent of MMO would be? Seems like an US product. Thanks
Really almost any penetrating oil, you can even do WD-40 or similar products. I would look up " Penetrating Oils Near Me" or something and should give some results at your local stores. 👌
@@loganwiebe5240 Awesome, thank you! Didn’t realise good old WD-40 would do the same!
Try a 50/50 mix of acetone and ATF.
You think this could work on a dirtbike that ran out of oil?
No you need to rebuild it.
Can this fix a seized ttr 125?
Not if it’s blown up
How did you find the bike
Bought it on clist.
Do I need to drain the mystery fluid from where the spark plug goes before I try and start it.
Probably a good chunk of it I’d make sure the engine spins up first
gas engine /electrie motor, do you understand?
I hope this works... wish me luck
Well I guess I damaged mine, what do I do now?
Did you ever get the bike running ?
ruclips.net/video/VKp8s1wv8vs/видео.html
i thought that spun a little easy. i've unstuck motors before, and they were not near that cooperative. good info though.
I did not have the camera rolling when I unfroze it. Sorry about that.
I broke the nut with the wrench. what should I do now ?
Oil change after it moves smoothly
You can easily break that bolt off in the crankshaft. Be careful!
Yup, mentioned that in the video. LH rotor bolt would have been a better choice.
Put it in gear and gently rock back wheel back and forth no damage lol
Sadly, I broke off mine in my 1978 cb750k. What do I do? Thank you for your answer.
@@chasetvph7379 try drilling it out with a left hand drill bit. Yes it cuts backwards so remember to run the drill in reverse and go slow. Sometimes the bolt will come out while your drilling it.
How do you get the fluid out of the cylinder?
When I freed mine up, I just fired it up and it poured a ton of smoke out so I’m assuming it burnt it up lol. Like he said a lot will puke out of the spark plug hole but there will still be some residual fluid on the walls.
Just run it
@@zacsmith1388so after you turn it with wrench do you jus use kickstart?
@@numanr5190 This was a couple brain cells ago so I am trying to remember. I am pretty sure that once I had it freed up, I ran the starter without the spark plug in it and the fuel off, once I wasn't getting any more oil out, I put the plug back in and turned the fuel on and it fired right up. Lots of smoke LOL.
Diesel is non detergent ,it works as a buffer
I just got lied to about a bike. I was told it only sat a few years and needed a carb. Nope, someone who knows this bike told me it laid on its side outside for 20 years. Motor is seized. Poured in MMO yesterday, just waiting for some change that’ll tell me I can finally just maybe get it free. Also I’m not a bike mechanic so mostly hoping to hell and back this even works.
I am in pretty much the exact same boat. Tell me how it went for you.
@@bmetzy no fluids we tried actually worked. Had to stoop down to buying an entire motor. Which was about $800 before shipping. Got most all we need minus air box parts and battery cover. But even now it won’t start because it needs the choke redone
Why risk the threads on the crankshaft? Just put the bike in gear and rock the rear wheel!
Would wd40 work
how do i clean out the excess oil in the piston cylinder now
Burn it by starting it if it starts
Straight up Diesel fuel man, its the best
Depends how rusty.
does this work for dirtbikes?
2 stroke or 4 stroke?
@@HTMR 4 stroke
I took out the carburetor 4 times already to clean/rebuild it, got 2 cuts in the process. I'm gonna be mad ass hell if this was the problem
I use a product called micro-mist. It works miracles.
I'll look into that thanks.
Old news bro GRANDPA taught me this yeeeeeaaars ago he would unlock D8 motors with just MMO