Project Two-Stroke Pt 2: Aaron Colton Takes His Clean YZ125 Rebuild Through the Mud

► Missed the build? Watch part 1 here: win.gs/2hpHwpV
For the countless hours of sweat and elbow grease one puts into rebuilding a motorcycle, there's an abundance of good times to be had. Aaron Colton didn't waste any time in scoring good times on his freshly built YZ125, heading off to Red Bull Day in the Dirt just hours after the wrenches stopped turning in Garage 93.
Music:
0:54 "Title Fight" by Blitz Kids (Red Bull Records):
flyt.it/BlitzKidsMusic
1:27 "Wide Open" by Rock and Stone (Sounds of Red Bull): win.gs/2hbIk2A
4:31 "Universe In Flow" by Rock and Stone (Sounds of Red Bull): win.gs/2haPjex
_
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[@dmritchie3]

the guy racing the 80's Honda is a fuckng G

[@FlexinJump]

Just gotta love that he just rebuilded the top end on the track xD

[@lazarnedeljkovic5615]

Rebuilt*

[@KGrasso89]

What's so great about that? It's a very common occurrence.

[@daxtinsdraper6117]

That’s Yamaha for you

[@carsongwin1816]

It’s XD

[@josevanrooy]

Yeah oke, the rebuild is beautiful, except for the worn out engine (the most important issue): because this would be the same as like taking a cracked frame from the scrapyard and further on build up your bike with broken parts except for a brand new engine you're about to build-in into this corrupt metal structure from the trashyard with all of these broken parts fixed on to it........

[@jalapenojack]

4:13 the guy with the hat has spark plugs in his ears? Lol

[@coltonlogan5779]

Tijn Koops 😂

[@eldiablo4616]

hahahaha

[@ryanowens2653]

Yup

[@corradovanaken3553]

Those are hearing aids you muppet

[@ryanowens2653]

Corrado VanAken Studios o they are not

[@maxwellyt9745]

needed to break in the engine before racing it lol

[@rpmjunky2795]

How the hell u save that cylinder. Thing looked clapped

[@djaydeved]

eh idk myself lmao

[@josevanrooy]

By possitive thinking...

[@josevanrooy]

Maybe it's an idea to put a little amount of this acid in your gastank in case you have to run in a new piston, and so preventing an inminent and sudden stuck of your engine 125cc (the acid will take {in gradual stages} little by little the aluminium off of your aluminium piston, and, after a while you can be sure of your engine will run like a exceptionally smooth and lubricated sewing machine, no stress and problems from that time on......).

[@clawsss]

@MotoRider125 uhh i think that once you have fucked up a nikasil plated cylinder its pretty much over if you dont want to get it replated

[@the_burchfield1655]

4:13. What the hell is up with home boys pants

[@jake-zi4px]

Never mind the spark plugs in his ears

[@wojtbb]

Those pants at 4:11 :D

[@cityofplant]

Redbull we need more of this guy on a 2 stroke! Make it happen!

[@dariuspavlich6575]

"run ur gas fatter" "you didn't run it through enough heat cycles" "wrong piston" "it's a Yamaha"..........y'all ever just think that shit happens sometimes. everyone is a mechanic on here I swear hahaha

[@damuryder9985]

Deadass

[@TheRalphFerrara]

big facts lmfao

[@josevanrooy]

I'm not a mechanic, but most probably this man buying this 125cc crossmotorbike, had to cope with a piston from an other brand, not Yamaha...

[@bitiberg]

loved the whole project!!! great work guys!

[@user-lf1vz6cy7b]

Your running lean, your pipe should never have that colour to it, and I noticed when u started it the bike didn't smoke at all

[@tylerharr3485]

LCP1988 agree

[@patto505]

Aaron Colton 3 weeks ago "Hey Luke, That was actually not the case for the seizure. I blue my exhaust systems on all of my bikes with a heating and oiling process." From a couple comments up.

[@wastedintelligence9040]

LCP1988 www.motosport.com/fmf-factory-fatty-pipe Here's a link to this style of pipe.

[@user-lf1vz6cy7b]

Ah my apologies man I thought she was just running hot

[@bryanc447]

LCP1988 maybe he used the smokeless oil idk

[@basedlord88]

Have the same bike, been sitting in storage for years, gotta drive it halfway across the US but I’m about to put a lot of work into that baby, loved that bike, most playful and fun bike to ride

[@derfboy15]

Are you using Namura pistons? if you are that's why she blew up haha. still an awesome video!

[@brendenmills9139]

same thing I was thinking hahaha

[@KGrasso89]

Could be a wiesco they make a piston with that coating on it and looks just like a namura.

[@josevanrooy]

Too much lead in the alloy? (i ask myself).

[@premixpeter1972]

He wasn't, he was using Wiseco. Note the W on the piston and the drilled lubrication holes that you only see pre-done on forged pistons (namuras are cast). I was thinking the same thing until I saw that it was a wiseco, namura's are garbage!

[@chanburrell4513]

This videos for everyone who thinks 2 strokes are dying

[@RelentlessCo]

Lol revs the piss out of it right after rebuild

[@HybridEdits]

Fr3ShPRiNC3 ehh, wouodnt take him 20 minutes to rebuild that whole top end. Plus those bikes dont really need a "break in" period like a 250 or a 4 stroke.

[@RelentlessCo]

HybridEdits true on the rebuild but they definitely need heat cycles to be broken in . I have 2 125's

[@HybridEdits]

Fr3ShPRiNC3 depends. I only do heat cycles on a full engine rebuild. Top end i let it run like 5 minutes idle with a rip or two in between and mines lasted for about 2 months.

[@RelentlessCo]

HybridEdits lmao 2 months isn't good , you probably wore your rings down from improperly breaking it in . Do multiple heat cycles and cruise around in the bike going through the gears but not high rpms , do this a few times then change the plug and rip

[@HybridEdits]

Fr3ShPRiNC3 well i ride hard as shit so 2 months is pretty decent for me.

[@armor1839]

great stuff love the yz125 sounds good!

[@neildickson4897]

never heard or seen this guy before but what a talent.youre a guy i want to have around at the track 2 great vids

[@Dropbackdurbin_ocs]

ya i love how he doesnt even break it in and expects it not to blow up

[@Germaingazm]

That bike looks AMAZING I wish I could have something like that as a 2nd bike :)

[@mitchellgreig8442]

Why was the sponsor sending it blurred out for most of the series

[@marsh621]

Mitchell Greig USPS logo with no rights for usage

[@gervaisreed4473]

Happy belated birthday It looked like u had a blast

[@TaintMeat68]

Brings back memories .

[@GeorgeLoch]

Great little series. Do it again!

[@DavidBrownFan]

6:50 is that a Anneke beerten?

[@TS50ER]

Did he have another spare barrel, if not what did he do to the scored barrel to get it race ready again?

[@chasedmuchowsky6257]

TS50ER it looks like he just used a Dremel

[@josevanrooy]

No, not at all, only a bunch of piston, selected from the local scrapeyard..

[@rowdy-pw7cy]

Man awesome bike I wish I could get my hands on it !!

[@blakebertani]

the reason the thing blew up is cause you used a namura piston... A NAMURA PISTON. who does that to a bike that clean?!?!?

[@ACDCRD]

Should have used a vertex piston

[@jonnoMoto]

It's a wiseco

[@TerrickHarden]

Lol I used a Namura piston once.. Worst thing I have ever done to a bike..

[@AaronColton93]

I do not think that is the case. I have never heard of a Namura piston before. Let along had my hands on one.

[@blakebertani]

Aaron Colton My bad then, could have sworn it had the Namura marking on the piston. Great bike by the way!

[@Kerrage]

are you guys going to go any more in depth with the build, or was it just all new bearings, fmf pipe boyson covers and decals and plastics lol

[@KUSIMUK]

I wish you used a black Clarke tank to match everything perfect ! Still looks great

[@willeypoboy6052]

Impressed! Raced in the cold rain and slop! Premadonna's would have used the blown top ta stop! Bravo brother!

[@jamesscott9081]

I miss the days when the track sounded like a swarm of bees! now its all lunky 4 strokers.. :(

[@Adam-sk8np]

James Scott kids these days I'll tell ya...

[@mjfox9577]

yeah stuff four strokes thats my opinion

[@christianswiatek323]

and also when the supercross had huge puffs of smoke at the pot of the building

[@mrkrabs41cpr29]

thing is, 4 strokes take a beating and keep on ticking.

[@zacoloughlan8933]

All these four stroke pussys

[@KGrasso89]

That track was a mess after the rain and looked like so much fun!

[@johnjamesharry1668]

Dude sounds like he's 45 looks 18

[@northstarracing18d-4d]

Being born and raised in Minnesota I laugh when I hear people say it's cold in California when there's a blizzard going on and I'm busy rebuild in my bike watching this at the same time haha

[@bryanc447]

Dom956 i

[@frostyberg5911]

Are you looking to sell the bike?

[@MrNotUrDay32]

I love this! It would be even better if I could afford a bike like these! Amazing video. Making me dream about bikes

[@strike7c562]

That 125 would look Bae in my garage

[@itsshalevfromtaxidashcamer9390]

Aaron's Yamaha YZ125 is the best! 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[@connorhubbard6439]

Hey where did u get that old motocross helmet in the beginning

[@subfrte6080]

thehungryOMNOM probably got a paint job from tld but idk where he got it

[@JAAK_49]

thats the gnarliest helmet ive seen in awhile!!

[@TerrickHarden]

That helmet is fugly

[@lukesandiefer4157]

Look how discolored that pipe is, you blew it because it's lean.

[@willthierfelder2400]

no, it's because it's titanium

[@lukesandiefer4157]

Will, fmf does not make a pipe that has that much discoloring near the cylinder. It will be blue near the welds, where it was super hot, but not that much closest to the cylinder

[@alpetty3531]

The factory fatty FMF will have discoloration just like that because of its raw finish. I have one and it does that even running fat. I wouldn't expect much more than wrong info from a quadtard

[@lukesandiefer4157]

Iv'e had bikes too buddy. The factory fatty doesn't have that much discoloration. Iv'e seen plenty but nothing like that. Also, no need to try and be a badass over a computer screen. Al Petty

[@AaronColton93]

Hey Luke, That was actually not the case for the seizure. I blue my exhaust systems on all of my bikes with a heating and oiling process.

[@phunguyen6039]

Richer fuel one step, no more seize up Less accelerate but wide open good to the end

[@josevanrooy]

Fuel oke, but if he forget's to put some oil in it, at the end he will stuck up this worthless piston, and then fanally won't make it, left alone win!.

[@ianboyd5436]

You need a project 321 gass cap they are so cool and are tuffer then nails

[@bryanc447]

Best yz125 videos

[@motojoe7508]

This just goes to show that if you have money, you can do anything

[@jasonwilly8409]

Nice stuff

[@tompartee4560]

did you put a numura in the first time? probably why you lost the first one. wiseco or no go!

[@DeAndre_2000]

No break in process just straight into the next race

[@kop3r]

It looks like an amazing adventure. To buy a craigslist bike, rebuild it and race, and rebulid again on the track.

[@hellhecticbmx3498]

Is there ever going to be a part 3?

[@paahtopro3950]

No

[@eschrader]

Part 3 is the washing in part 1

[@cartmen2182]

good job

[@karinaleszczuk8219]

Is that gear 2017? Right now I'm rocking 2016.5 Fly Racing gear.

[@sanctuary8873]

NICE 125 2BROKE!

[@DougZ73]

what's up with the blurring of the "sending it" decals on the side shrouds, in some of the shots and not others. Mostly blurred in part 1 of this build. Great vids, BTW

[@coreypierce4888]

You have a brembo front master cylinder on your front brake for some reason.

[@matthewb9241]

That turtle onesie was on point.

[@redbull]

🐢

[@AaronColton93]

Rafael is always down for a good party.

[@Lootge1er]

will there be another part? :D

[@kalebgillem8055]

Good job happy birthday

[@cam_ron69]

Are those Oakley air brakes?

[@LukeHeironimus]

Start to finish how much did it cost to rebuild the bike?

[@jimjones9642]

I just rebuilt a ktm 125, pretty much the same way. Powder coating, bearings, engine & suspension rebuild. Minus the bike, and u do the labor, $15-1800.

[@alexisr1257]

How much did you spend on the total projec

[@564Alanguiver]

the old front fender looks good with the new rear end.

[@randyreynolds6508]

i like snickers ...I thought so to

[@addicted2tone349]

That mud is when it gets fun..

[@tidepods3182]

He put the restyled plastics beside the front fender, the most common restyled plastic

[@Cijpher441]

is it just me or does this dude make bad line choices

[@zanebatten8893]

bjorn wisman considering he comes from road racing he’s done pretty good.

[@dirtbikemainiak4145]

I don't actually think his a pro mx racer think he is a stunt rider

[@josevanrooy]

I don't know, putting a brand new piston into a worn out and scratched cilinder..

[@ohwhye]

Why is the USPS logo on the shrouds blurred out on some shots?

[@mjtoogood9828]

Happy birthday

[@loganixon]

Still questioning the old style front fender

[@ImJustShadow.]

I mean I know he rides street bikes but I was expecting him to be a little bit fast lol

[@josevanrooy]

You know: it's not easy to win the race with a scratched cilinder and a cheap piston made from scrap...

[@ImJustShadow.]

@@josevanrooy im talking about his technique not the bike

[@ImJustShadow.]

@Aiden Bowley motocross is an art form there is no type of riding that requires more technique watch some videos...

[@timcahill7792]

My 1995 yz125 is a one kick bike as well

[@AdvBrewery]

Why is he revving the piss out of it cold

[@adrianaustegard8928]

Cuz its not a four stroke

[@Chubbza5]

livin' the dream

[@2vintageDeamonFan]

How would it have blown up that quick?

[@eschrader]

0:38 does the back tire turning when on a stand mean the clutch has an issue?

[@TheRoyPeters]

No completely normal

[@Fa5Squad]

u got any 250cc for sale

[@mattspurlock8060]

Pwedie did you get the graphics

[@jamesblanco4843]

Why is a namura piston bad

[@micagardner8280]

That is one clean bike

[@mathiasbeck2143]

Nice

[@karinaleszczuk8219]

Part 3???

[@marsh621]

ktm front end??

[@christianpresas780]

where is this?

[@jesusofminecraft5384]

I wonder what the guy he bought it from would think

[@Geheimeraccount]

That was really a day in the fucking DIIRT

[@natelandreth3869]

How did he “save” the cylinder without resleeving it

[@coolmusic1579]

Looks like he had a Dremel tool with a sanding wheel on it. Smooth out the rough stuff.

[@austintaylor7117]

Why did he blur the sticker out

[@jmakinen.]

When u change piston u gotta have least 4% mixture in the tank. Otherwise the bike will lock up.

[@B.C.EpicExplorer]

running lean gotta have a puff of smoke when you blast it.

[@SONSofGONS]

I like the video, but you had to rebuild whole top end first time, not just the piston, it blews up cause cylinder is damaged, it is oval, you can't see that without instruments. I had same problem. Heat goes on piston rings and they overheat. Also, when whole top end rebuilded, you need to drive slowly 1-2 tanks with 50:1 fuel mix depends on motorcycle, after that, just a crazy two stroke raww!!!! like a bee. Nice rebuild by the way, thanks! :-D

[@eamh2002]

50:1 is for environmentalists that want to make your engine seize up, I go with 3% because it doesnt give any power to give the engine less oil, its the opposite and its not a problem to clean the engine every once in a while :) Give it 35:1 and make your bike happy. And it cant be "oval" if you can see the honing marks, if you dont see them and hone it many times then yes it will be oval :D

[@matthenry4593]

3:57 intents racing I know the owners and the company. I use to work for them

[@Jesusinthesky]

Can you get me moto boots

[@levipalmer7685]

Where do you get the graphics from?

[@AaronColton93]

Blown Concepts. Based out of Minnesota.

[@woolery2631]

Part 3 pls ;D

[@wes3317]

I bet he put the piston in backwards the first time and it hit the exhaust ports.

[@mikejames4271]

Have you heard yourself?

[@josevanrooy]

I bet he forgot to put the two bearings into the cranc ax....and even the third bearing that fixes the piston..

[@andrewprice4217]

Day in the mud

[@jakobsnook5480]

where can i find that style helmet he has?

[@dumbdumbspersonalstreamer3553]

Jakob Snook it is a repainted unit helmet

[@ruairimockler7569]

Does anyone know what the song name is at 5:58

[@euanbmx3674]

Sick

[@phillipjensen9560]

What is the brand of the full on red bull he used first? Rad helmet ⛑

[@TerrickHarden]

Really?? Its quite ugly to me..

[@AaronColton93]

It is a Retro Bell Moto-3

[@skylerjack1002]

At 1:23 both of the guys stayed at my camp

[@pornhublive3364]

Take a shot of liquor every time he says stoked