Rebuilding a KX125 Engine - Completely! 

Great video, enjoyed the journey thoroughly! Man of many skills, gear head, koi farmer and hero of lobster!

I LOVE LOVE LOVE how it's one big long video. So much better than 15 five minute clips all over the place. I take my hat off to you sir!

Spider says, " I'm not checking out this engine, my friend Ricky Bobby got painted over and I was trying to free him!" The cylinder came right off, and so did Ricky Bobby! And so, while Brady takes apart the engine, spider and his fallen friend, Ricky Bobby, make their two hour journey back home, where he will be laid to rest. Right where his father, and his father's father, and his father's father's father, and his father's father's father's father before him were laid to rest. All in 2020. In honor, Brady grabs his first, and last by the looks of it, beer of the day and prepares to crack it open while shifting gears. Remember kids, don't drink and drive, even if you can't go anywhere, as we have seen Brady do while motoring around the koi pond! All in all, it was the best $20 Brady has ever spent...on beer! Excellent video! Brought back memories of watching my dad restore cars and motorcycles. His video would have included many bleeps tho! Lol! PS Could be that ride that Billy Joe McCallister took off the Tallahassee Bridge and got all that moisture in the engine. Lol! Are you singing that song yet? ;) If you see a chance, take it! Sorry I stole your thunder and told the back story of this video. I know you were saving it for a rainy day. Haha! A broken spring meownt, he says in the presence of inspector kitty! And pray tell the location of these wild "hares"? Careful, kitty might like to chase said " hares"! Oh no! Don't cut the Saran Wrap! You can use that later after a couple more beers so your wife doesn't feel cheated you spending all that money on a broken ride!

Great video, I am in the middle of taking apart my 98 kx125. Thank you sir

Amazing 🤘🏼

freakin awesome dude, im restoring a 1985 kx125 and this is going to help a lot!

Brady, your how to is so informative going to be our reference guide when we finally find an old frozen up yellow or green 125. really like to find an old super rat but that may be impossible to get parts for.. 125 mx bike, lift the motor by hand and put it on the bench!!, beats the hell out of the Nissan motor swap Justin did... .Awesome video!!

Just picked up a really good condition 1990 kx 125. Starts right up and idles good but 1st and 2nd gear have very little power. 3rd gear the power finally kicks in but still not like a 125 should. Im not the most mechanically inclined guy but i can take instruction. Any suggestions for a good place to start would be appreciated. Im going to start with easiest stuff first like changing the spark plug and cleaning the carb. What should be my next check after that?

Well it's good to see Dad's old adjustable crescent wrench survived the break in too! 35:30 Leon Rules!😎

I remember on my 85 KX 125, when it came time to replace the piston and rings, the hot ticket was to use an 86 piston and ring because the 86 only used a single ring, not dual rings like the 85, so it revved quicker.

Great video! Very easy to understand what your doing and I didn’t fall asleep watching it! 👍 Are those CRs for sale? Lol I have been looking for a 79 or 80 CR125 and 250! I raced both those bikes back in the mid 80s and want to find a 125 and 250 a 1980 250 and a 79 or 80’ 125. We are going through the same thing you are with an 86 Kx 125 for my grandson. I did the same thing, the compression test was great, it even ran for a couple laps around the yard, until it seized!

Really enjoyed watching this great video thank you for Sharing with us I’m now a new subscriber 👍🍺

Good job overall,but next time soak the clutch plates overnight before assembly

Great detail video!! Helped me out alot. I'm having a problem finding case gaskets. Could you please give me the part number on the kit you found?

if you have an bearing supply house near you, like a warehouse in an industrial area kind of place, take in the old bearings in and have them match them up. It'll save you some Ebaying and waiting on shipping.

I hate how kawasaki puts the oil seals inside the crankcase. Have to take everything apart for a stinking seal

Having a hard time removing the flywheel any advice how did you do it really need help thank in advance!

Hi, I was wondering if your bike requires a secondary movement after either shifting up or down to return the shifting mechanism back into position to make the next change? Example: after shifting from 2nd to 3rd I have to lightly press the shifter down in order to perform another shift... Thanks for the video; It was extremely helpful!

Is there a gasket that goes on the bottom side of the jug or just metal to metal ?

Can you direct me to where you got all of the parts for this bike? I just picked one up and I found a lot of the stuff I need but not all

What did you use to get the Flywheel off??? I just took the magneto out of mine but cant get the crank out without removing the flywheel

what is the carburetor you use on this build i cant seem to find one that works good like exact name if you could if u remember

There are two KX 125's i'm looking at. A 85, and a 86. I'm hoping to get them both.

What did you used to pull the fly wheel off

I just bought the same carb you put on your Honda CR250R Elsinore. What size jet did you put in to rich it up? Thanks

Working on rebuilding the same bike could I by any chance get links too all parts please exept piston and cylinder thank you

Hi, can you tell me the number of the bearing crankshaft?

oof... gotta admit, somebody breaking into my garage and stealing my bikes and my tools would be my worst nightmare by far!!! I mean, I "only" dabble in Suzuki GS500E's, which definitely aren't a rare and sought for sight around here, but still... they're my babies and I wouldn't want to lose them!

It had to be sitting for a good while if, the wrist pin didn't slide off the piston. But I know nothing about motorcycle engines so...

Good video but I wish you showed how to take flywheel off

What paint did you use on the motor

Hey Brady I am rebuilding a 1984 kx125 and would love to get with you about somrthings.

i picked a 1985 kx125 up for $100 and it’s all messed up but it’s good project bike

❤❤❤❤❤❤ممنون

Did you ever find those ducks?

I have the same bike. Are you for hire?

i think she busted the skirts because she tried to compress water