Honda Cr 125 piston / top end rebuild. A movie produced by Frez Productions
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- Опубліковано 10 вер 2024
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Link: / frezproductions
2002 Honda Cr 125
This is the first video I've made using the Canon 60D DSLR camera.
Ended up making a video of myself when I changed the piston on the Honda Cr125. I have noticed that not all of the scenes are in the correct position during the video. I'm not a very good mechanic either so during the video you may see some flaws but all in all the Cr is running very well! It has already many hours on the track!
This video might help others to changed piston themselves.
Hope you like the video.
Thanks!
All rights reverved
Frez Productions
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for people who want to save time. dont take the head off. unless the gasket is damaged or you are having compression problems there is no need, just slide the barrel out from the top and give it and the powervalve butterfly a good clean with carb cleaner/brake cleaner. great video by the way.
the simplicity of a two stroke is a refreshing thing to work on as a mechanic
this is the best instructional video iv seen thus far
Chris Clarke Thank you! :)
+jangho9 I agree 2stroke engine porn for sure!
+Chris Clarke maybe add torque overlays next time you edit, but GREAT video.
I agree. Step by step. All you have to do is rewind the video if you forget a step. Awesome.
Great video the only thing that would have made it better is instead of musichave someone giving audible instructions as they're doing it
So much satisfaction watching this
At 7:29 you are missing a washer/bushing where your power valve actuator arm attaches. Also put a rag below to block the pin from falling into the right side cover.
Nice job on the production of the video.
Bro you’re a life saver didn’t realize mine was missing it until now🫡
I'm a very rough critic i would say and your video is flawless. Everything is clearly told what to do , the music and the camera angles just makes me happy watching this video! Thank you very much, I have a cr125 2004 frame, 2001 engine. Your video will help me a lot since my engine blew up and am going to rebuild it soon.
I was waiting for the way he installed the piston with the rings on into the cylinder. .he skipped the most critical part ...
my last rebuild on my 2001 honda cr125 was a pro x piston too, lol. nostalgia. i am currently a year or two into a very slow going project of completely rebuilding my bike. only initiated due to 3rd gear popping in and out. hopefully i will be finished in another month or two. i cannot wait to ride again. i need to feel alive. its been too long. work, sleep, work, sleep. i cannot fucking take modern life much longer without a bit of escape. 2 stroke heaven provides said escape. so damn good.
there's a little bushing that should take the slack out of your governor to power valves linkage where the little pin is
I noticed that too
you all probably dont care but does anybody know of a way to log back into an Instagram account?
I stupidly lost the account password. I would appreciate any tricks you can give me.
@Leon Taylor Instablaster :)
@Demetrius Ronald Thanks for your reply. I found the site on google and Im in the hacking process atm.
Seems to take quite some time so I will reply here later when my account password hopefully is recovered.
Why I love 2 strokes! So easy to work on!!
Thanks for helping everyone who is a do it your selfer. I bet this video has saved a lot of people a lot of money.
I don't know why, but this video was extremely satisfying and mesmerizing to watch, and very educational! Thank you!! I'm going to go buy a CR125 for my daughter with a blown head gasket, and rebuild it! Better to do a teardown anyways buying a used bike, you never know how the previous owner treated the poor thing!
Thanks Devan! im glad you liked the video. I hope to start to make new videos soon. If i was you i would change the top end on a used bike that i dint know anything about. Its the best to be on the safe side.
It's my first time working on a cr125 and I was looking for a video to get some advice. I never thought that I would find such a well made and invormative one! Thank you very much!
Now lets go get some oil on my hands ;-)
probably the best rebuild video ive seen on youtube, very nice! faved
I can't put my finger on why but this is deeply satisfying to watch.
thanks for posting this video. i have only rebuilt a 400ex once. trying to refresh my memory. getting ready to rebuild my rm250.
This is your lucky day! The bike in the video is an 2002 Cr 125 :)
Im glad the movie helped you.
Frez Productions perfect my same year and model
I have 1
I watched this because i am having an issue putting the head over the piston because of the piston ring being a pain
But you didn’t include it😂
@@damiens_wrld6558 You mean putting the cylinder over the piston?
It's good to dissasemble the power valves because when you're starting new with a fresh rebuild, there good to clean because over time they build up alot of carbon and don't want to work properly which can have a huge impact on power and throttle response. That is where I went wrong years ago. I rebuilt my 02 kx125, but I never cleaned the power valves and it definitely didn't have the power it should've for a fresh rebuild because that really does have a huge impact on several different things.
really good video man, im doing a top end soon and this video has helped me understand how to do it way more, sick bike btw man!
great video just bought 87 cr125 to restore came across your video had to watch.
Hi, @ min 7:24 you forgot to put on the flanged collar that rides on the tie rod linkage that connects to the exhaust valve. You just secured it with the cotter pin is all. I would fix that.
Vinny Garner was thinking same thing that hes missing that collar, but then again the bike might be missing so hes working with what hes got
Was gona say the same
Your bike look VERY clean and nice for an 02. I have an 02 YZ125. Long live 2 strokes!!!!!!!Braaaap
wow this is by far the best instructional video i have ever seen period. I feel confident now that i have watched this video that i would have a descent idea of how to do this rebuild. Great video keep it up
this was the best top end rebuild movie i have ever seen ! very good!!
Always install the circlips with the gap facing either straight up or straight down. The force of 1000+ RPM will pop that thing out very easily. Otherwise, great video
Bruh I love u for this I’m 15 and I had all the parts and did it day by day it took me 1mouth and 22 days while I got off of work and school💯
Just to do a top end? I'm 13 work and ride my stuff it take me 20 mins o rebuild a top end
This Video is Incredible. Great Job. Just installed my 1st Piston. Came out great..Thanks
Thanks! Im glad it helped you out! =)
This video really helped me when doing a top end rebuild on my cr 125... many thanks and keep up with the great vids!
jangho9 THANKS FOR YOUR VIDEO. AND YOU ARE VERY GOOD MECHANIC AND CAMERAMAN !!!! REALY HELP OTHERS TO CHANGE PISTON THEMSELVES. GONGRATULATION !!!!
Thank you great vid.
Off to install my new piston
One of my favorite rebuild vids.
Over time and with a lot of practise with rebuilds you get to know the feel of a tourqe spec, but its still wise to check your manual.
Great video my friend!!
My CR 125 it needs new piston because it got stuck.
I believe that i can change it myself
Thanks for the vid helped many I'm sure.
I hope so too :)
Man, great job. Loved the song that went with the video
Thanks much. You made this process easy for me.
seriously cool video and I have exactly the same bike with same graphix except fatty pipe
Professional..I had just picked up a 1982 Cr 125r.I have to say it's in very nice original condition.I am going to replace the piston,ring and top gaskets.Because of it's age and knowing it has tempered through it's riding hours I was told to put a very thin coat of good quality gasket permatex on them to ensure a good all around seal in case there may be any imperfection on the actual surface.I am not going to have it resurfaced on the head but clean it well and assemble..Any comment?
Most models u just pull out the rods and flap its basically a gate that opens and closes for more exhaust to escape disconnect the one side then pull the pin threw. As in cleaning it i would use contact cleaner or brake cleaner something to remove the oil. Make sure tho after u clean it lube it back up with some rawww premix. Next time if it dirty change your jetting or fuel oil ratio
Excelente!!! Gracias por subir este video. Super explicativo y didactico.
also wanted to point out you have a single ring piston. there are also 2 ring pistons availabke. 1 ring pistons are preferred for race use but 2 ring pistons are preferred for longevity and non-race use.
if your cylinder wall is scored or worn, or you just go big bore, you really want to shop around for a place to mail your cylinder for a proper bore and replating. Bore-Tech in Ohio is the one I know of in this region.
lastly, I should add that if you put in an aftermarket forged piston, they require proper longer warmup times before getting on it hard. oem cast pistons should be warmed up properly before riding hard as well, but the forged materials are much more sensitive to thermal expansion/contraction, and it becomes even more critical to give the engine proper warmup time to get to normal operating temps.
Double ring piston in a 2 stroke= more friction less power your way better off to runs single ring
chuck lambert I'm not aware of any twin ring pistons for 125's for anything above 150cc I definitely would want two rings. Single rings have around half the life of a twin ring setup. Also if you have a nikasil plated bore which pretty much any bike 30 years or newer will have, I'd recommend just getting them replated over getting it over bored unless you're looking for power. It's only around 200 bucks to get a replace and it lasts as long as any new cylinders plating will.
i admit last time i did a top end that nut under the power valve cover i had to shave a bit of meat off a ring spanner, so i did not properly torque it back down along with the rest, luckily were i work now i have access to torgue wrenches that should allow me to use open end spanner bits to torque it. otherwise a standard socket torque wrench would not fit in there. ( hence previously just doing it up by hand with a modified ring spanner, untorqued.)
This is going to help me a lot! im about to do a rebuild on my 96 cr125! great vid
Honda is best! ;)
2 stroke gang!!!
Hell yeah :=)
i like how this dude is just doing the bare minimum of parts. because realistically all you actually need is the piston, the ring and the gaskets. a lot of people would replace everything else while they are there, and that is just unnecessary. just for aesthetics.
I'm looking into buying a dirt bike, and was really unsure about 2 stroke or 4 stroke. After seeing how easy it is to replace the piston, I'm pretty much sold on a 2 stroke now.
Awsome! TY for posting this video! well done and the bike looks great.
I beleive it's time for a fresh rebuild man! to me it sounds like there isn't much compression. Sometimes a bike will just barely idle with low compression, and once you try to give it some throttle it just loses all compression and trys to die on ya. I'm suprised it even starts.
Really nice video! Allot of effort and time put in to this and very helpful! Nice bike!
One of the best quality videos I've ever seen! Nice job man
que buen vídeo amigo. muy prolijo en tu trabajo. saludos desde Argentina.
Why is thos so relaxing to watch? :)
good videos but why did you not clean the power value,
I was going to ask him about that. I was wondering if he did it and didn't film it. When they get stuck, the bike runs like crap and damages the cam spindle. It flattens it.
u have a very nice bike i just got a 1997 cr125 runs well but doing her up
1.21 to 1.24, check 19323-KZ4-700 oem part, this bike need it ! Excellent video !!! Greetings
Amazing video. Priceless help. Many many thanks....
How do I know if my top end is bad? I was riding my bike yesterday and doing about 65 mile-an-hour when all of a sudden it started to slow down like it was running out of gas. I kept trying to feather the gas to keep it running with no luck. Finally stopped try to start it up again and it started but then immediately started running out of gas.so I parked it behind someone's barn and took about 20 minutes to walk back to my truck and by the time I got back to it I started it up and it ran fine again but instead of driving it any further I just loaded in my truck to not cause any further engine damage in the event it is something more serious. But how do I determine if I need to rebuild the top end
TKs for share the video!!!
Hello, friend.
Please tell me, I have a 1998 Honda cr125r, the crankcase is broken, can I buy from 2001 and rearrange my insides?
awesome job!! I just wanted to ask did you test the torque on the screws or did you just tighten them??
i neeed the answer to this also, very good question!!
Honda's motors are very similar to that of a yamaha and kawasaki is similar to that of a suzuki. The kawi and suzuki have 2 piston rings and the yami and honda have 1 piston ring, this provides better performance because its racing spec :D
Very good video man, thanks you so much! Just changed my first piston, and it work fine! PS: Nice bike you have
good afternoon, I have
Question, I want to change the piston, if I remove the piston, do I need to change the cylinder or not?
Cool high level video but I think some people would benefit from seeing some of the low level stuff like how to torque the front cylinder nuts.
Hei. Har du noen tips for å få pinneboltene ut av sylinderen? Jeg skrur på 2-3 muttere på gjengene, men de sitter bom fast nedi der...
I just did this to my 93 cr 125 i had to have the cindler re sleeved . It's at 120 psi. Everything is set to stock on the carb . Runs but poorly is this due to a worn crank seals? .
When installing the piston ring, make sure the writing on the ring faces up. When installing the piston make sure the IN on the top of the piston faces the carb.
That's one thing I was looking for to see where the in faced! Thanks!
Awesome video! Thanks for the information!
that piston was still fresh you didnt need to rebuild
I_like_goats he needed to keep the bike running mint at all times
do you not have to file the ring gaps on two strokes or did you just not show that step? I know on my 450 you had to have the proper gaps. Also did you hone the cylinder or is that necessary?
good vid,but the best piston is vertex with graphite trattament.It's a 02 model but is much powerfull 00 year
What is the piston ring gap for rings on a A cylinder standard bore 2003 cr125
excellent video
Sweet! Let's ride!
when u rebuild a two stroke do u have to hone the cylinder or not...I curious Im new rebuild engines.?
Nice vid, gotta love two stroke ease to work on music was good to
+shaun oreilly Thanks Bro, glad you liked it :)
hollywood video !!!! nice
просто український коментар, не звертайти уваги..дякую за увагу :)))
Thank you so much Aleksas53! I really apprecate your positive comment :)
When I took off my top end to little black pieces came out and they had a square hole pls help when I pulled off the power valve they came out
An excellent video.
Awesome video! Thank you so much
Thank you!
BEST VIDEO ON UA-cam! i luve u so much ure the most epic dude of all time thank you! :D
I love honda cr models awesemo.
I owned a 2002 cr125r,now crf250r 05 with fmf exaust.
it does. should be an arrow for the exhaust port. hope this helps
This is similar to a 2002 CR80 but bigger cylinder correct? Sorry it's probably a dumb question, but I am just getting into dirt bikes.
Great video man
What about the torque for the head bolts? And what is the break in time and steps for a new top end for this thing?
Hi mate great video but you missed the collar on the top of the actuator in the exhaust valve. You just put the pin in without the collar
Nice short!
Im running short on money, my top end has small engravings on the side. Its a 82 Honda cr125. Should I try to get a new top end?
it is reborn of something beaautiful...
cant wait for bottom end! :D
Nice vid jangho9! did you use torque wrench on cylinder nuts? just asking if its a MUST to use it because my Kawasaki KX 125 has the cylinder nuts in a really tight spot and its impossible to use torque wrench on them unless you buy some specialty tools for it... i'm a bit afraid that cylinder ain't tight enough even thought i tightened the nuts as tight as i could with a small 12mm wrench (that's the only tool that can be used on them).
Amazing video thanks!
when u rebuild a two stroke do u have to hone the cylinder or not...I curious Im new rebuild engines
I had to get a new cylinder piston and cylinder head. they come without the exhaust flap and assembly. How do I remove the shaft and ball bearing that holds in the flaps? This has brought my rebuild to a halt.
Great Vid, work and editing! good job.
great video helped alot