Probably the most watchable how to video I've ever seen, no unnecessary dialogue or time-wasting. Straight to the point and easy to watch

Great video. As a mechanic, one thing I feel I should mention is the importance of replacing the crankshaft seals. They only last for so long, and when they start to leak, they suck air, leaning out the fuel air mixture. This can result in poor idle quality, and more importantly it can cause piston failure. So if you're replacing a piston because it failed, it's essential that the seals be changed too. It's something a lot of people overlook.

@jangho9

8 жыл бұрын

+Terrace Thornhill Thanks bud. Good words there!

@9drewbreez

8 жыл бұрын

+Terrace Thornhill What exactly is a crankshaft seal, i am new to 2 strokes

@steveringer7143

8 жыл бұрын

+Avenger 21 The seals that seals the crank case from outside air. There is one behind the flywheel and one inside the clutch case on the crankshaft. The 2 stroke crankcase is where the air/fuel enters the engine. That's how the crankshaft is lubricated, with the fuel/oil mix.

@9drewbreez

8 жыл бұрын

Steve Ringer could you send me a link for a 02 cr250 I'm thinking about rebuilding it

@steveringer7143

8 жыл бұрын

Avenger 21 Type in the word GOOGLE.

Great video, just one tip: When installing the circlips, install them with the gap pointing straight up or straight down. This prevents the clip from being squeezed at high RPM and falling out. Other than that, great job, you've got a sweet CR

The best top end rebuild video I have found yet.

Perfect. This is the perfect sample for piston replacing in our honda

Wow - Thanks for saving anyone who watched this video over $500 each for such a precision work of art.

Very nice. Very smooth. Very calming. I feel refreshed just like that top end.

VERY relaxing top end build video. Music is great as well. Thank you so much

@jangho9

7 жыл бұрын

Thank you! :)

@juanpablomartinez5596

3 жыл бұрын

@@jangho9 Plis , awhats ? tork cilinder???? Gracias

@jangho9

3 жыл бұрын

@@juanpablomartinez5596 Hello! Torq on the cylinder is: 39 newton & 29 lbf-ft.

with the help of this video I was able to do a top end refresh on my 2000 CR125 for the very first time ever...never again will I let the Honda shop charge me $200 for a 15 minute job. thank you dude! I truly appreciate you taking the time to make this tutorial!

I don't have a bike yet but enjoyed watching this nice.

Your bike has got a very beautiful sound

@jangho9

9 жыл бұрын

Arkalyos | GaminG | Thanks!

THE HEART OF A 2 STROKE IS THE AIR FILTER.

U make this look EASY!!! Me and my cousin have struggled for HOURS on our 50cc mopeds trying to change pistons and sylinders to 47mm instead of 41mm...

@pauldenham2952

9 жыл бұрын

I can do it in 20 mins, thats the work period at the end of a day for a six day enduro, or both tyres and top end in 45 mins with moose tubes.

really well made video, you helped a lot of ppl. Good job dude! Let ypur bike warm up properly, and you dont need to worry about revving it. touch the cylinder from outside, if its about as hot at you can handle for 5sec's, your good to go full throttle after a couple of good accelerations. And that r2/tts is great oil for 2-strokes.

I do thank you. I have a 1985 cr125 I'm doing the top end myself for the first time. The other videos show like we are already mechanics and skip a lot of little things they don't find necessary to show. But I'm not a mechanic so where you went over piece by piece it helps me out a lot. Example...the copper washers in the front. Little things make a difference. I got my parts yesterday from Honda at closing. I didn't look at them until today. They're closed on Sundays so it will be Monday, they forgot the wrist bearing. I think that's what it's called. The bearing for the connecting rod and piston.

@jangho9

3 жыл бұрын

Thank you so much Kenneth! Im glad you like the video :=) Wrist bearing is right, hope you get it fast!

Greetings from Las Vegas Nevada USA!!!

I don't even own a 2 stroke but this is still a cool video to watch now I know how to if i ever get one

Finally a video worth my time

@jangho9

3 жыл бұрын

Good to hear bud :=)

Beautiful video, thank you for that!

This helped me get $50 haha thanks it was a great help

Excellent cinematography

As long as the clip is away from the hole on the side its fine. Nice vid you didn't do anything wrong man

Great video! Very professional and well done..... Don't forget about ring gap....

Great video helped me rebuild my 2000 YZ 80!!!

@jangho9

7 жыл бұрын

Thank you. Im glad it helped you :)

Nice video, and great editing :) Keep it up!

Exelent video...2T forever.

way cool, I injoyed that a lot. I love all cr 250s

Thanks mate. Gonna do mine now. Cheers

Good stuff ! looking into buying a CR250. Considering just doing a full top and bottom end build to start off fresh but hate going into the transmission and what not.

Great video, thanks for posting

Yes it is. The only thing you have to pay attention is to the power valve actuation system because when mounting the cylinder it can be in the wrong place.

That's a dam clean bike!

vídeo muito bom !! Parabéns (congratulation!)

excellent video. thanks !

Wicked bro hell yeah dope vid!

Thanks for the video. I'll need this for my 2002

@jangho9

9 жыл бұрын

Thanks! Im glad to help.

Awesome video.

as always a very nice job!

Great video!!! Please make more

excellente vidéo !!!.....

something beauty

Oh my god...That was actually theraputic.....nice

i love how simplistic 2 Strokes are! anyone with some tools could fix there motorcyle up over a day

@jangho9

8 жыл бұрын

+Chris Nicole Yes i agree :) Thats why i ride them. Easy to work on, cheap to fix, very reliable and LOADS of fun. I grew up riding 4 stroke bikes and quads but riding a 2 stroke is so much more fun.

perfecto el video tio

great job man!!! very nice"""

another good rebuild video! ill favorite this one too lol

Thanks for this! It helps alot!

@jangho9

9 жыл бұрын

jamesbb91 You are welcome :)

awesome video

Very nice video, thank you!

excelent video

Dream bike !

proper ping.. very nice

Thanks for sharing!

Thank you for the video. I'm doing a top end on a '86 Trx250R which is nearly identical. My Wiseco kit should arrive in a couple days. I'll watch this video again before installation.

@jangho9

8 жыл бұрын

+Chad Adams No problem man, thanks! Yep thats almost identical. And you do not have to worry about that exhaust valve either :)

@bamagolds

8 жыл бұрын

Thanks for the response. It all arrive today. I'm using the Engine Ice coolant, if that makes any difference.

@jangho9

8 жыл бұрын

+Chad Adams That doesnt make any difference :) Good luck bro!

@bamagolds

8 жыл бұрын

What signs did you notice that lead to your rebuild? I ask because I have a stock bore. My compression went from 125 to 140 psi. My manual says 170 psi +/- 15. It still doesn't run right and I've done every adjustment I can think of. Think I should bore?

Nice job👍

Now i can try my own rebuild.

Great video. Wish I could find one on rebuilding a 2000 KX250- especially one this thorough.

@punkkerboyzz

10 жыл бұрын

it's pretty much the same thing on any 2-stroke

very nice video

Depends on your definition of similar, over all yes but there might be some model specific changes. The overall process is the same on any 2 stroke.

bel video chiarissimo.

ottimo video complimenti

great vid thanks

I definitely wouldn't think so. '02-'07 are case reed engines. In '02 they completely redesigned the engine, along with the frame and maybe a few more things, like a RC actuated power valve. A top end change isn't very hard to do though so you'll figure it out. Major peice of advice: GET A SHOP MANUAL. It tells you how to do almost everything, including torque values which are pretty important when your assembling an engine. PM me if you have questions, I should be able to help. Good luck!

I love it!

Best rebuild video online now if you could do kx100

great video man you gave quite a few good tips but first timers should know to break in the piston very gently like idle warm-ups 3 times than gentle rides for 2 times and rip her to pieces on the track! keep the good work comming man!

@JimmyLLL

10 жыл бұрын

That should say, warm her up and go fairly hard straight from the get go.

@TexasLeverGunner

10 жыл бұрын

Wrong... wrong wrong wrong.

@motoXkiddvlogs

9 жыл бұрын

Fuck that. I got 100 hours on mine. Break in doesn't matter warm it up before every ride and it will be fine no matter what you do

@painmagnet1

8 жыл бұрын

+motoXkidd vlogs Hard break-in is correct. Heat cycles are a stupid fantasy.

I did my 1st one when I was about 12 , an I had to rebuild the front forks because the were bent backwards after someone crashed it into back of a car, I did it from reading a manual book back before internet could show you ,

Thanks for the video. You forgot to: drill the lubrication holes in the piston, set ring gap, and deglaze the cylinder.

@jangho9

6 жыл бұрын

at 5:58 you can see the lubrication holes. I always drill lubrication holes :) Thanks

@ghostmorrill

2 жыл бұрын

Can you tell me more? I'm in the process of rebuilding my son's 2002 CR250R. Will I need to?

great video .. I just did this today .. but noticed .. I gotta do the bottom .. do you have a bottom end video like this one .. this video was very helpful ..thanks

i like that bike, you should hone the cylinder too, unless it still has the crosshatch and it is in decent condition then dont worry because in a single hone you put like 50 hours of wear on the cylinder because it takes off a real little metal

Buena maquina 👍

Thanks alot!

i love 2 stroke

勉強になりました！！！

please more videos like this....you help me a lot😀👍

@jangho9

7 жыл бұрын

Thank you :) Yes im actually working on a new video right now!

@petarlucic2012

7 жыл бұрын

Frez Productions I am waiting for that 😃😃

Awesome video! Two stroke are such much simpler than 4 strokes one question why do they have the copper washers in the front only?

good job can you tell me if you feel the wiseco piston feels any diffsrent than the standard one i.e Does it rev quicker etc cheers

jangho9 great video man really helped me out understand the whole process of rebuilding my 2003 cr250. I was just wondering did you drill holes for the exhaust bridge because I read you have to drill those 2 little holes with wiseco pistons and I was a little discourage because I wasn't sure how to do that

What are the songs used in this video? Great videography btw!

Thanks!

I could not find any vids on how change piston on my kx125 so i watched thos and went and replaced piston cause it needed rebuild (btw i used wisco) and it was preaty much same alosmost but it turned out great and i dont feal like im riding 65 any more lol

@jangho9

3 жыл бұрын

two strokes work the same, doesnot matter if its a honda or a kawasaki :) Im glad it worked out for you!

great video! brief and to the point yet simple. i feel like i can do this now. too bad ill be trying it on a Beta trials bike and not a Honda CR >__

@jangho9

9 жыл бұрын

You`ll be fine! Its the same procedure for all 2 stroke engines :) Give it a go and im sure it will work fine.

Nice video, and sweet bike. Super clean. I don't remove my powervalve arm, just the cables. Any idea on why the cylinder on the '05-'07 got an update in the powervalve area? Just to make it easier to service? I'm pretty sure I saw Mikuni but that carb bowl makes it look like a Keihin carb. Is it? I've seen some CR's with Keihins and that's what they look like.

Sweet

Been thinking about doing the top end on my KDX. Had people telling me the cylinder HAS to be resurfaced yet I've seen no mention of that in a few rebuild videos I've watched. Of course it would be good to do, but is it required? My KDX runs mint as is, if that changes the answer at all

Thx

You have to hone the cylinder for the the piston ring to seat with the cylinder. Same with 4 strokes.That or replace the cylinder.

I would make sure to clean the head bolts. Any little bit of debris that gets caught between the head gasket and both mating surfaces is a definite way to create a leak. Happened to me on my first rebuild when I set my cylinder head down, scraping some of the corrosion of the bolt onto the head gasket. Unfortunately I had to go back in there and replace the head gasket and make sure no debris was left over.

@moparftw

5 жыл бұрын

Not just that but debris on the head bolts can result in incorrect torque, although not a ton of difference but it's still just a good habit to clean all bolts always.

one day il have one

What should the ring gap be set too tho? I will be running a wiseco piston and its dual ring...

3333. bad ass vid!!!

Nice video but I had one of these and you don't have to pull the head. The piston slips part way into the cyclinder on assembly and the whole assembly drops down over the rod and you push the pin into place and put in the snap ring in. Much easier to do...it's a bunch easier ....can't do it this way on 2005 and later YZ250's though, not enough room. Same procedure for the 4 strokes...

How do you now when an oversize piston is needed? Did you have to use a micrometer to check that 1st?

Do you have to glaze or hone a cylinder every time you rebuild ?

should of put the ring in the cylinder check for ring gap,overall a great video still

Look how easy it is compared to a 4stroke

@heidihorsman8242

9 жыл бұрын

Nathan Mcfall like buttering bread ive done a ton of em. bottom ends to.

@eddies2kturbo

9 жыл бұрын

That's why I'm getting a two stroke man don't get a four its to much lol

@MrFreeze79

9 жыл бұрын

Nathan Mcfall ya but how often do you have to rebuild a 4 stroke? been riding for 6 years but brand new to dirt bikes, it just seems like these 2 strokes have to be babied all the time, so many engine rebuilds!! it just seems a little crazy.. why do these dirt bikes require so much maintenance compared to road bikes where you just change the oil every 4-5000 kms ? by the way, do you have to replace the piston as well as the ring?

@kevinstearns4198

8 жыл бұрын

+Nathan Mcfall fukin hey rite!!!!!!!!!!!!!!

@javandell8020

8 жыл бұрын

+Nathan Mcfall I find my KTM 500 4stroke to be much easier to work on than taking an engine apart. One mistake and this bike will become useless.

how to adjust rc valve? thanks

cool....

Makes me want to buy myself a 250 and make top and rebuild for fun

@jangho9

2 жыл бұрын

Thats fun! Buying a Cr250 now a days is not a bad idea because they only go up in value :=)

@mcbecane6249

2 жыл бұрын

This friday im going to buy one 😅😂

@jangho9

2 жыл бұрын

@@mcbecane6249 Nice!! What year ?

@mcbecane6249

2 жыл бұрын

@@jangho9 2004 with 2016 fender kit brand new rebuild of the engine and the aftermarket suspension with bigger brakes and lots of goodies Im more the "built not bought" type of guy, but for the price, it was worth it and I sure going to give it some of my personnal taste onto it like my older crf250r 2016 i blew 2 yrs ago by powerdercoating the frame black and putting a 4 stroke dual exhaust on it dm me if you want to see it !

cool!