Race Motor Rebuild

[@TS50ER]

That Boyesen crank case is pure class! Love the tank as well, classic lines. Looks like you have a great pit bike there that sounds great as well. And the cherry on the sundae is that you built the engine yourself, and you can't say fairer than that. Great stuff.

[@satan101101]

Please don’t delete this video I’ve watched it a dozen of time and it’s pure joy to watch it again and again.

[@scottsmall95]

Good video. Watching engines being put together, even on something this small, is like artwork. Good job!

[@dalbirttggjsingh2684]

Scott Small fhygpjgfubsyv fyygyooi.

[@aamalikmuzmmailshazy5144]

Nice

[@65Superhawk]

My dad was a Honda Service Manager in the 70s and said that Honda tolerances were so good and their mating surfaces so nice that no coppercoat or sealant was required nor recommended. If you got sloppy with sealant and some small pieces broke off the "bead" inside the case, it could plug oil passageways and screw your motor. GREAT video. I enjoyed it!

[@TheAlexManVideos]

I built this motor over the course of a few weeks in my spare time. I probably spent about 5 or 6 hours working on it totally. I can dissasemble and reassemble a Z50R engine in about 2 hours if nothing goes wrong. In this case I was spending extra time to film and work carefully. This entire engine could be built for about $2000, maybe less if you shop around. The engine was not seized, I just wanted it to be bigger.

[@rikstar.]

Theres no rush in rebuilding an engine!

[@767dag]

i am fifty two years old and had a 69 and a 71 honda 50 when i was a kid , love your videos , i think it would be great fun to build a little race motor like that ...

[@timmitcham2810]

When I was younger, I was pretty quick to critisize when I felt the need. As I got older, wiser and more mature I learned to keep my negative thoughts to myself. The reason being- things are not always exactly as they appear. I had the misfortune of having some of my criticisms come back and bite me on my a$$. If I was some bone head with NO toys or NO practical experience, then what I'm saying might not carry any weight. Since I'm retired, having been a machinist (automotive and general machinist/welder fabricator), mechanic, etc... And after owning my share of neat mechanical toys (past and present- Corvettes, Camaros, Novas, Mustangs, Mopars), I can afford to run my mouth a "little". As of now, I've got 2 strokes and 4 strokes in my shop- I much prefer 4 strokes. I also have 2 Harleys, so I'm a fan of V-Twins. There's also a couple of 4 bolt 350s waiting on my attention- one is an aluminum head, roller motor going in a V-8 S10. I enjoyed the video! It may not be perfect. But then again, how many of you are perfect? How many of you know EVERYTHING? I certainly don't. If you don't like this harmless video, click on another one. Save your criticizm- use when it is really needed. The IRS certainly comes to mind. Benghazi cover up comes to mind, too.

[@reza6570]

دنده تایم

[@fredlee9054]

Show off but still got some lesson from it...learn to take some shit guys..honestly this guy are great and wise👍👍👍

[@jeetendrag10acc2]

People who wear gloves generally make meticulous work,as it stems out from actual requirement and also from a psychology of self- discipline and neatness.Personally, I trust tutorials from gloved technicians/engineers.

[@ProjektHeld]

Interesting music combination 😂 it would be great if you would talk a little bit while your doing your stuff

[@shinkioske6720]

this vid. helped me 2 years ago and now im planning to change my new acquired motorcyle some new clutch lining and spring. i can say this is helpful tnx man ...

[@normwcole]

The wrist pin retainer clips should be facing towards the top or bottom of the stroke so G force does not cause them to compress and come out

[@HybridPhoenix08]

I would have installed them 180 degrees opposite of the way he did in the video. You never want the ends of a snap ring to be near a gap in its groove.

[@dilwyn1]

Just a little tip.... see the piston cir clip at 3:47.... if you place it with the gap either up or down, it will be less likely to pop out at high revs. Important on a two stroke but also on four strokes to. Just an observation from an old engine tuner.

[@TheAlexManVideos]

The bike wasn't built for speed, it was built for the track. Going fast in a straight line is boring.

[@johnbrakingground]

Alex almost a million view on this vid.. congrats I watched these vids when they first came out. Nice of you to take the time to show people the process.

[@TheAlexManVideos]

Thanks, I take pride in the work I do. The bike is a 1984 Honda Z50R.

[@skeefoopanama]

Thank You AlexMan, Finally A video of an actual rebuild.Im sick of seeing vids,or reading articles of someone claiming theyre rebuilding a motor,but all they did was a top end,or take apart a carb to clean it and say they are rebuilding the motor but all it is is putting a carb back together.You wanna bes take a good look at this vid,THIS is a engine rebuild,not changing out a piston,or cleaning up a carb.If its a topend say its a top end,how hard is that?

[@kattymora6049]

excelente trabajo, mejor imposible, me ayudo de mucho. Gracias...

[@leuterisxatzimixail2174]

very very nice job, but you just miss one think to show, the clutch!!!!!! excellent job!!!!!

[@iwanawithyou]

this called racing bike? its not even a bike :D sory i dont want to be negative but its funny :D nice video btw, i like it :) its a honda orion block am i right? a pit bike engine

[@OlaZzz]

You think this is "cute" and "funny"? I have a friend who owns a Honda Monkey (chinese replica) with a 160cc YX engine, and it can outrun most 125cc 2-strokes, the compression rate is almost 14:1 and it has about 25 bhp.

[@kylerberve]

0laZz 125 2 strokes are cute haha jk they are cool but a race bike is more like a cr500 but im just a hill climber but did love the video

[@OlaZzz]

You call a 500 a "race bike"? A 250 is more than enough for racing, 250-500cc 4-strokes as well. A 500 is a bit overkill for racing, plus it's not as nimble as a 125 or a 250.

[@kylerberve]

look up great american hill climb thats the kind of races i do and all but a supercross bike is a 250 2 stroke for sure but i hill climb or a 1000cc engine in a 250 frame thats a climbing bike but a 500 for stock class

[@brandonquenneville7330]

It is capable of high output . Not reliability =race engine. No matter what size block for you dip shits below

[@STiX_87]

Look man, I keep in these mopeds tuning since I was 8... I have placed Takegawa covers at all moped engines, even if it was a Lifan (I hate them). I can't accept this Z for track use, because it is bored to start. Secondly, the carburettor you are using is an imitation from Keihin 24. I had a Honda GLX90 @57mm piston bore in ASSA alloy cylinder, with Kitaco cam (The 90s have the best cylinder head) but later I put on a Takegawa. I used an RD350 Carburettor made by Mikuni. It was nice machine.

[@johnbiladeris]

you build a takegawa for a small motor like this?I expected to see a honda glx,maybe a crypton x but not this lol

[@Socrates2060]

λες ονοματα αγνωστα σε αυτους, τα κρυπτον δεν εχουν βγει εκτος ευρωπης, και τα glx δεν τα λενε glx στο αμερικα (δεν υπαρχουν glx εκει βασικα)

[@fatalghost1726]

johnopropla μπανει takekawa se Crypton x ? kalutera se glx

[@ΙερόΑγγούρι]

johnopropla χαχαχα τι crypton x ρε φιλε 😂😂δν μπαινει

[@SLADE330]

nice little engine - sounds like at least 15 hp well done

[@notorious6198]

The sirclip is gonna fall out if u keep it sideways like that. Its suppose to he up and down because of the pressure its up n down. U seem like you know whag your doing tho

[@robin2meyer]

i thought the same xD

[@kaidan199]

could you told me what you are telling about? plz tell me the time point in the video

[@robin2meyer]

kai dan 3:24

[@amorag59]

You can also put the piston in the cylinder part way, then insert the pin. Great vid, cool stuff!

[@NINJAPUNISHER1002]

Is this groove street from gta san andereas ?

[@irideyamaha94]

wasnt expecting that little engine to sound so good at 7:42 nice bike!!! just needa work out the rear fender before its gone from the exhaust!

[@tinolino58]

Race? It's a tired 4-stroke.. Thats 2 too many! :-)

[@princeprosenjitdas7182]

I like thic

[@truckie8509]

SpookySnek In general 2 strokes make more power..Also sorry for the late reply.

[@babaabdul6510]

in MotoGP 4 stroke more power than 2 stroke

[@tebibyte2357]

@@SpookySnek9 not for reliability

[@tebibyte2357]

@@babaabdul6510 2 stroke make more power because of the -2 revolutions and the 4 stroke has more durability and reliability

[@lobosdelacalle]

la verdad el mejor video de como armar un motor!!!!!! impecable!!!!!! ahora quiero desarmar el mio y hacerle todo nuevo.........ja...

[@CassioVA]

Never use a hammer to put a bearing.

[@TheAlexManVideos]

Why not? If you're tapping a bearing onto a shaft, tap on the inner race. I you're tapping it into a hole, tap on the outer race. No damage will happen. Tapping on the inner race to seat the bearing in a hole, however, is bad and will ruin it.

[@rihardskruminliepa9554]

TheAlexManVideos Only rubber, wood, maybe brass hammer, but no steel. Can make micro crack for sure

[@IR4epiclaggerAUT]

TheAlexManVideos I also think like that, but if you heat it enough you don't have to use a hammer.

[@IR4epiclaggerAUT]

Thodoris twentyfourteen gas torch I don't know if its the right word, I'm Austrian.

[@L33t3n]

but dont heat it too much... otherwise the lube or oil in the bearing could burn/fly away ...

[@sega702]

Nice video, you do nice work.. What type of bike is that?

[@pedrorodriguez2778]

KOOL BRO

[@brandonquenneville7330]

DAMN BOY!!!! Peeps better recognize this guys potential and helpful videos. Thumb up

[@JonBorpa]

that's not a race engine it's not even water cooled

[@laurikovero]

Jonathan Wesolowski honda monkey, honda z50 j50.... never water cooled only oil oor air cooled

[@organdoughnut]

this was the most helpful video i found thanks for taking your time to do this from this my bike engine had been rebuilt and will be seeing if it runs tomorrow thanks again, Danny

[@mohammadfayz6439]

what problem happens with cd 70 engine when its voice starts changing

[@MotorbikeMechanic]

clincer problem ho skti hy

[@MotorbikeMechanic]

kzbin.info/www/bejne/gIG4YZKef89rbqs

[@Mr261194]

man i love learning how to do things from you videos it helps alot keep the good work up

[@jonayamaha3215]

technically you could race a motorized bicycle (it doesn't get smaller than that) and yet that motorized bicycle could be classified as a racing vehicle, so yeah, this is a racing engine, big or small Motorsports are Motorsports, so please stop talking about your penises, please. Nice takegawa Alex.

[@ianboy1979]

nice vids man.. you need to make another one for drag racing... just like mine.. awsome ride dude!!!

[@deeligee]

Yup 4stroke sucks

[@A_Man_Of_Culture_]

Show me a two stroke with 20k miles without any maintenance other than oil, and I will agree.

[@kaarmyta]

mrsuperbuckets you really dosent know anything about engine do you...

[@jessereed8578]

Thanks for the video man, you have showed me how do pretty much do anything with these motors! you have the best vids on you youtube!

[@Nicknos73]

People doesn't like tu run in... but it's the most important thing in an engine!!!

[@Midnight_Rider96]

here is a tip that applies to all race engines, 2 or 4 stroke: always install the wrist pin clip so the ends are vertical. if you don't, it could pop off at high rpm. great video though!

[@dedeqshredder5922]

i love the pipe sound..its sounds like the old endurance pipe..

[@gillistheman]

most motorcycle cranks (like the ones on the crf and z 50's) are pressed from the factory. the 'big end bearings' are needle bearings that are captured on the pin of the crankshaft. usually 2 thrust washers, then they're all pressed together. So you don't install them at home, they come like that.

[@TheAlexManVideos]

Please don't be rude. I'm sure he does know how to race port a cylinder head, port match an intake, and swirl polish valves. I'm sure he can convert a 6v case to run 12v ignitions. And I'm sure he knows how to convert a 6v right case half to mate with a 12v left case half. And I'm sure it's second nature to him to make an XR75 swingarm fit a Z50R frame, despite the numerous complications. And I don't even have to mention how to shorten BBR forks, everyone knows that.

[@snaproll94e]

Nice job on the video and assembly. Ever thought about packing the oil pump with petroleum jelly? It will prime and get oil pressure quicker, unless the pump is already located below the oil level and is submerged in oil? It will be interesting to see if you get into bigger engines down the road.

[@powerofdreams91]

i noticed you have a breather for the head... were is the safest place to run this tube to? originally i ran it to the back of the bike then i figured it was doing nothing but sucking in dirt.. then i cut it and ran it strait up n taped it to the frame infront of the gas tank... n it does nothing but spray oil all over my shirt lol what should i do with it? does it actually serve a purpose, or jus looks cool? thnx for ur advice... n also ur vids have helped me out ALOT.. DEFF GREAT JOB ON EM!

[@mr47uk08]

thats 1 sweet rebuild motor sound tight & pukka shame bout your rear fender tho gettin carboned up off the exhaust , sweet build tho!

[@silvias13freak]

That is so cute. Look at that little piston!

[@cornholio114]

I LOVE that bike. Great video too.

[@felixcat4346]

What a cool video, better than trying to read "Zen an the Art of Motorcycle Maintenance".

[@TomvdHeuvel]

Very interesting video you got here, I like to put all my nolts and bults on a cloth as well, keeps everything nice and organized :) I use instead of a torch a hot air oven wich i put to 120-150 degrees celcius, this way you evenly warm up the entire engine casing. Dont worry though this way is fine to :D Greeting from Holland.

[@chevroletcorsa222]

el mejor video que vi de un armado de motor felicitaciones

[@vmxhannah960]

Takagawa, Boydstun Nice! What ignition and oil pump did you use????

[@Sweetaniel]

perfect job, enjoy it to see how somebody does a good job in mounting an engine. the only thing I cannot do is work with gloves. I need the contact to the material. And I prefere 2strokes, thats more adventure and a screaming little motor makes more fun

[@mucuca1]

se trata de uma moto .... prefiro carro .... mas nao posso deixar de comentar que esse cara é um tremendo PROFISSIONAL .... very god job !

[@alb.1911]

what a fantastic moto!! great video! Nice and clean work.

[@ineedauneeda]

A nice tidy old z. Very cool.

[@NickNack0207]

i love working with engines and taking them apart and rebuilding them, fixing them.

[@TheAlexander275]

awwww dude! You put so much work into and it CRACKED!!! I would be pissed

[@mineurbiz]

If it has sat for a while, those carbs gum up quick and those damn pilot jets have a VERY tiny hole, that easily clogs.

[@nickrodriguez6013]

Awesome video. and a cool little bike too.

[@jerrysiscon]

no prende no prende jajajajajaja ntc esta bueno tu vídeo amigo pero pensé que era una moto un poco mas grande-sita saludos desde México df

[@kluuc]

Hi there, clear video! can you tell me, where did you get the ignition cover?

[@Impossibilty232]

Nice video.....If you don't mind could you tell me where you got your flywheel cover i would love to have one :) thanks

[@TheAwesomeArcane]

It's strange the type of people you find on youtube... They'll insult you and/or your mother but in the same breath, also bitch about you not wearing a helmet for a slow test ride to the end of your street. Anyway, great video. Wish more people took the time to put quality vids like this, up on youtube.

[@CHIBA280CRV]

Excellent ,and that is a sweet looking engine...peace "

[@babis1977]

Awesome! A complete documentary! Nice job! Try to make some more videos like this..

[@petergeralis5292]

Dude really good job, makes me wanna tear into my Atc 70.

[@Jakeyboyshow]

Nice bike, Sick video dude, great entertainment with the volume UP! =)

[@TD4f22]

Seeing your hard effort paying off-great!

[@Braaaplive2strokes]

Awesome video. Nice job on the motor rebuild. Keep up the good work!!!! :))

[@alanmotoscba]

crf450 baaaaaaam.. it sound very nice :) here in argentina we made a 140cc piston 56.5mm (honda fan) with crankshaft.. 10.33seg in 200mm have amaizing power :)

[@Leafsrule016]

Piston's don't generally make much of a difference. If you want to make a difference do some head work, get it ported by someone who knows what they're doing, maybe do a big bore. There are a lot of things you can do to make a bike faster

[@lyciferakos]

you can slide instantly your bearings if you freeze them, no hammering needed.

[@sideshow45]

great video man. know nothing about these little things but t was a really good video.

[@woodshuck]

whatever you say man, i'm only 17 and here in belgium we're not allowed to have big engines at this age so i have one like this and i enjoy working on it, i'll go bigger later. have a great day

[@YZFMANIAC08]

Awesome build and bike also!

[@CarlosGonzalez-ud5rb]

Brother, greetings from Argentina. good job

[@TheFreshPolarbear]

nice build man

[@kokkonosiko]

this video brought up some sweet memories excellent mate

[@TheAlexManVideos]

Intake valve? That hose is to help vent the crankcase. The stock breather works good for stock engines with a small piston. The larger piston moves a lot more air. Both breathers vent back to an oil catch can so no oil gets on the track.

[@767dag]

great skill my friend , i loved the vid , so cool

[@johnsonspeedfab]

This video is just roast gold. (Like that CDI)

[@glennspeeds]

Look at all the views on this video! This guy is awesome and does great work.

[@KeystoneMotorsports]

What year and what displacement is your engine? My friend and I are restoring his 1969 Z50A, the thing is a beast! I have videos of it on my channel if youre interested.

[@arley862]

looks awesome mate

[@MongoKipZ]

Nice work man!

[@TheAlexManVideos]

If you have Taky parts already, go with Taky parts. If you have a stock motor, the Taky parts are better, but they are more expensive. I like the TB parts for the average recreational rider, cheaper and just as reliable.

[@sid-hy8lf]

Sweet video. Nice honda

[@Fr3Dh]

Nice work man By the way, that neighbourhood is so cool, where are you from? :D

[@Mishellis]

learned lots of things by watching this video, thanks my friend

[@JonTheLefty]

did you buy all new crankcases and covers? if so where did you get them

[@shujunkie]

Tak ma być. Jakby postawił na centralnej stopce to koło by się obracało ale mógłby je zatrzymać jednym palcem bez użycia siły.

[@jimmyhill9843]

Some very fine work indeed!

[@Herc111]

well done mate!

[@TheAlexManVideos]

The motor is really out of a CRF50. It revs super quick because there is almost no flywheel weight. The exhaust helps the sound also.

[@TheAlexManVideos]

That'd be a neat idea. Many years ago I built a go kart that was powered by one of my Honda 50 engines. It was my first project after buying a welder. It used the 3 speed and the auto clutch. But a machine that used the Honda trans as a hi/med/low secondary transmission and a Peerless as the primary would be pretty interesting.

[@che_guevara_41]

Very very good job..👍👍👍

[@spartan1071]

Thank you for this video it made my day a lot better.