Making an Automatic Two-speed Go kart Transmission

[@aaroncutchins888]

I don't think people realize the sheer amount of technical knowledge that goes into designing and machining these parts you make. Plus you do it on DIY machines in your shed! Great work man, keep it up!

[@suntzu6122]

Wait he made those milling machines? Omg lol

[@64BitMatt]

JohnnyQ90! On youtube is who you're referring to with the RC car transmission!

[@kristinewilson5353]

Johnny Q is a freaking genius.

[@fastw3748]

I thought the same

[@RoostaIRL]

yeah thats who i was thinkin too

[@carsonrodgers1468]

Beat me to it, hes one smart dude I take a lot away from all these guys videos

[@imonfyre]

That is exactly who I thought of when he said "another youtuber who bought an RC car with a 3 speed transmission". I watched that episode. And this is hella neat to see it scaled up!

[@engineresurrector2414]

i love how the ending was done in a "This old tony" style. by talking with his hands over a workbench.

[@themonkeymoo]

Not just the ending. I assumed it was part of TOT's go-kart series from the thumbnail, and was really confused bout how I hadn't seen it in my subs at first.

[@thomasaltruda]

Haha he should have a scotchbrite pad just laying off to the side!

[@தமிழன்0000]

He doesn’t have a camera man please understand it but he showed the old tony style on camera watch again

[@nothingtoseehere4026]

Kudos to your artistic director. You had a "Make it Extreme" vibe going on in this one; minus the heavy metal music. Very nice.

[@norsevikingsir4932]

Artistic director?? Lol

[@robomoto5550]

Watching the milling an fab is so calming with the music. If it was on tv it would be backed with death metal.

[@ExplizitDuester]

then you make like AVEs machining videos, he uses classical music. more enjoyable then this hyped up tv stuff

[@cinnamonrollypoly]

Love the music selection. The combination of fabrication with the music is calming.

[@absolutemadlad2671]

I like that he didn't explain it as he was working on it it gave the chance to try and figure out how it worked then he explained it fore anyone that didn't understand it

[@jaredbudzinski8434]

This is fantastic! Essentially made a centrifugal clutch for gears! It’s going to be fun figuring out the correct spring ratio and finding out how much torque the one way bearings can handle. Should be quite a bit if I remember how they work.

[@CharredSteak]

old sears minibikes had a similar setup, just with two centrifugal clutches and a sprag. i'd imagine this setup will be pretty jarring going between high and low, the two clutch method that sears used was very smooth

[@Henning_S.]

I think you will need something to absorb the shock when 2nd Gear engages. Maybe a v-belt between engine and transmission or the shock absorber from a small car clutch ( the inner section of the clutch disk with 4 radial coil springs) or a combination of both, just to give the engine at least a fraction of a second to slow down. otherwise something will break...

[@firefighter494]

Its impressive that homemade lathe can be so accurate over a long distance like that shaft.

[@realxtreme2471]

The music choice was something else and interesting, I like it a lot.

[@AndrewMalkin]

Reminds me of a Christmas movie

[@Snugglez187]

The music is the one thing I hate about this channel. I would much rather just hear machining noises, or better yet, talking about what he's doing. The crappy music loops that so many people use drive me nuts. I had to skip ahead to the end after just a few minutes.

[@AndrewMalkin]

@@Snugglez187 I think music can go a long way to make the vids seem more professional.

[@dgwelch455]

@@Snugglez187 try muting. It’s not about the “music”.

[@nathaniellangston5130]

WOW!!! That's awesome!! I'm thrilled that there is now a second two-speed transmission video out!!!

[@evil_me]

I was looking at using similar one way bearings on a kart but the torque limit on them is basically nothing. I'm very interested to see how these hold up! Also on most centrifugal sprag two speed gear setups have the sprag/dog mechanism on the driven shaft(in this case the axle) and not the driver shaft. If you have problems with it shifting into second and right back, or not staying in second properly then you might want to consider this. RC two speeds have that setup where the sprag/dog is on the spur gear (driven side) and not the pinion gear (driver side)

[@fitz3540]

Those one way bearings won't last hardly at all. They'll immediately break.

[@jonathan7744]

I was gunna comment this too, the one way clutch should be on the wheel axle side so that vehicle speed determines the shift point not the engine rpm. Else like you said, if you're trying to climb a hill or something and need more rpm and power its going to upshift when you don't want it to, lowering your wheel torque.

[@rjames1864]

Thought the exact same thing after finishing the video. Those one way bearings will slip if they see any real torque and he built the whole system on the wrong end. It needs to be dependent on wheel speed not engine rpm to work correctly.

[@ClumsyCars]

first gear could use the spring loaded lever, just sprung out instead of in.

[@sumptersmith2683]

Somebody get this man a brass hammer lol. Using a claw hammer in the shop is never the right option, unless you're fixing the roof or something

[@Jim-nu6ux]

I was wondering why he didn't press them in.

[@norsevikingsir4932]

It's about force and how much you use.

[@Muglez14]

Somebody get this man some cutting fluid.

[@HWPcville]

@@Muglez14 How about a parting tool also?

[@Ham_Strokers_Ejacula]

@@norsevikingsir4932 not quite, you can still split a race with a hardened steel hammer with little force. The softer material gives you the ability to give a stronger strike without the increased risk of damaging your work. That being said, a 4lb dead blow is really all you need on bearings that size.

[@Glens1965]

Don't know to be more impressed with the fab skills or the video filming/editing process. Very well done.

[@zachco01fredette74]

its about time some one builds something thats been in the rc world for years cant wait to see it used on one of your builds

[@matfav9473]

This is quality work! Now just imagine what the 16 people who disliked this video could do.

[@jacobpeterson8270]

It’s 35 now

[@dylanzrim3635]

Could be the exact number of folks who know 1st will shatter

[@stevelamperta865]

@@jacobpeterson8270 Now its 45.

[@stevelamperta865]

@@dylanzrim3635 If you build it out of the wrong steel it will ! This is actually a very old concept .

[@c.mcdermo]

As a machinist and small engine enthusiast, this is one of my favorite channels

[@grahamcifuentes4451]

Bloody Brilliant Rather B! I can see your next step right now! At the moment you have to pull the whole shebang apart to "toon" it. If you were to make your spring heavier, and include a very short coil spring under the head of it's holding down screw, you could "toon" it through a hole in it's sprocket boss. you may need two screws and holes, or some other method of keeping the spring captive, so it doesn't rotate.

[@Rudy97]

that spring out lever thing is not going to hold much power.

[@bjornhenderson7847]

Yeah he will probably work the kinks out

[@rickorr2181]

Cannot imagine that the pin that the pawl ("spring out lever thing") rotates on is strong enough to work for any length of time. Interesting theory, but the setup, I believe, needs to be much beefier.

[@evil_me]

Problem is that it's on the wrong shaft, all RC two speeds have the centrifugal sprag/dog on the spur gear / driven side... I have a feeling it's not going to stay in second properly.

[@IceStone69]

POSITIVE THINKING PPL

[@absolutemadlad2671]

A basic gokart motor has from 5 to around 15 hp that should be plenty strong enough to withstand it the only concern would be what he used fore the pin in that little gate I dont know what metal it was

[@motomule]

Brilliant!!! Can't wait to see it work!!!

[@ethan9659]

How is this two days ago?

[@carsonhendee919]

@@ethan9659 I think some people can get early access to videos if they have a certain link to it

[@ethan9659]

@@carsonhendee919 thanks, I was pretty confused

[@carsonhendee919]

@@ethan9659 No problem

[@mahina1963]

finally, someone who understands the movement in music. Calming, yet inspiring!

[@benhightowerv]

I remember when you built the manual and I was blown away, thought it was ingenious. Now homeboy's like that was so old, watch this.

[@soundgodpro]

I really dug the music. It gave your video almost an epic film quality. Quite an interesting design. Can't wait to see what you put it on!

[@AmblingMan]

seems like it chages gear based on motor speed rather than axle speed? What stops it dropping out of high gear once the revs drop?

[@red1246]

Yup, that's what I'm worried about, I think it would have been better make it controlled by the axle

[@Acamperfull]

I think it would be more logic to let the wheel speed decide when it is time to change gear too. I guess that -once engaged- the 2nd gear would not disengage again even when the engine speed drops, but when you release the throttle (briefly) it could gear down again

[@AmblingMan]

@@Acamperfull I was thinking that any torque reversal, or loss of traction would release the sprag. Hope I wrong.

[@red1246]

@@Acamperfull due to the geometry I think the gear will be locked in place until you release the pressure by really letting the rpm drop but it would be more logical to let the vehicle speed decide when to shift...

[@clayz1]

I’m a machinist. This is certifiable nice work. You did a lot of thinking ahead building that pawl. I like your solution to match drilling the hinge pin too. Grinding a clearance notch so you can drill the hole using the pawl as a drill fixture. So what else, you say? I say I like it.

[@EliteRidesandTides]

This is called Intellectual Horsepower.

[@johnnym1320]

You could also use a centrifugal clutch for second gear, which would be easier to build and tune 😉

[@psyolent.]

your videos are getting towards this old tony spec with that amount of machining bud. love your work.

[@alansaxton5683]

that was a super satisfying video to watch and the way you explained every thing was easy to under stand. well done.

[@Marc_Wolfe]

You're spring loaded mechanism should be on the output side, as in on the rear axle.

[@Toolingabout]

The feeler gauge springs is genius!

[@terryprice7990]

WOW, a lot of engineering went into that! Way back in the 60's, Rupp had a 2 speed automatic "transmission" on their TT500 mini bike. Theirs had a standard centrifugal clutch on the engine that had dual #35 chain sprockets on it. A pair of chains went to a jackshaft, one to a one way with a large sprocket (low gear) and the 2nd went to another centrifugal clutch with a smaller sprocket on it which was 2nd gear. There was only one main chain to the rear wheel. When the high gear clutch engaged the jackshaft sped up and the one way released. Whomever hires you will be lucky!!!

[@bubster1981]

the right way , the centrifugal will buffer or cushion the shift ,,,this will shift like a bomb

[@brandonhaines1920]

Is it me or is Chris like the master of ASMR?

[@Avetho]

Its not just you. I think I found a new trigger XD Machining ASMR lol

[@indyjones3287]

Great editing and machining!

[@randomgc]

Just adding in my own compliments on the 2 speed, and definitely for the editing and music on this one. I came for the new 2 speed, and stayed for every second of the beautiful video. Very well done sir!

[@thomaspryor8202]

Well done! That set up is Dope! You have upped your machinist skills. Your ready for another lathe.

[@davidowen888]

GENIUS ! I really enjoy these milling videos, as boring as they may seem, the time lapse makes it look easy, would like to see a real time clock !

[@cravenmoorehead5636]

Milling ain't boring lathes are boring. Haha pun intended.

[@ciclotronforever]

Man this is genius !!! Congratulations !

[@shanerc]

Just glanced at the thumbnail and thought it was a This Old Tony vid, clicked on it thinking "This sounds like something rather b welding is going to be interested in". Pleasantly surprised, nice work man.

[@jpwipeout99]

Dude I am loving this old Tony vibe going on. And I love the music

[@lafondla21]

I remember when this guy was making janky as heck drift trikes and powered scooters 10 yrs ago with recycled parts. Now hes got almost 500k subs and is making this kinda stuff. Keep it up man!

[@kooldoozer]

This is very cool. The design and machining are very impressive.

[@terrancebarrett727]

The stuff you make amazes me man! So talented!

[@noah2016999]

Chris i like the music choice for this video very enjoyable to watch and listen ad you work.

[@billthetaxman89]

Legend has it that he is the only man in the world able to make a straight cut with a hacksaw 😂

[@Bubaaak]

Ever heard of Allen Millyard?

[@AddictedtoAir_69]

@@Bubaaak yeah he sliced metal like onion

[@wyattd9515]

That thing is going to be sick

[@dodgeme1986truck]

A similar transmission design was used in the king midget cars. You may want to add a second locking pawl to your high gear as that first one may be too weak on its own (under load at peak torque it may fail). Another way to make this transmission is with 2 centrifugal clutches (2 separate engagement rpms ex. 1600 rpm for low speed 2500rpm for high speed) a 1 one way clutch sprocket (low speed the one way clutch prevents burning the low speed centrifugal clutch shoes when in high gear) and a fixed high speed sprocket

[@dustinmiller7278]

Holy crap. You never cease to amaze me keep it up brother

[@msw3456]

Damn dude, this is impressive craftsmanship! There are other gokart youtubers out there but you're a level up (or two) !

[@StephenBrewer89]

Basically how a Tmaxx transmission works. Well RC car transmissions in general. Pretty sweet man!

[@woodytheskip1718]

Like the design. Very interesting editing style this week. Quite like it 👍

[@martinhogan5970]

ALWAYS love your tracks; this score was just as appropriate!!! ....then about 15 minutes in, you started losing me 🤣🤣🤣

[@myturkishlife1777]

Great video, machining + tunes 👍👍😁

[@TheScottsawesomeart]

your craftmanship is off the charts! , but i dont understand how the first gear disengages when the second one catches.

[@quickturn66]

First gear doesn’t disengage but is able to be overridden because of the one way bearing

[@N_Andrews]

It free spins as the axle is going faster to out run the reverse lockup.

[@CainSample]

Ol red beard would be PROUD of you 👋👍

[@billhacks]

awesome! the easygoing music was nice with morning coffee as well.

[@shawnthompson9912]

Dude ! You stepped it up with this video. Your lathe skills are improving ! It made me start searching for a lathe of my own . Keep up the awesome work, and the videos ! Thanks

[@StraightLineCycles]

Someone is improving their editing skills 👏

[@Falconguygaming]

Just in the future, try and turn the ID and OD in the same setup so they will be parallel to each other. Anytime you remove part from the work holding you add misalignment, can never get totally true again with indicating in, might only be a few tenths but everything helps! Love the channel, keep up the good work!

[@JoelArseneaultYouTube]

That is pretty cool engineering. I would add some sort of friction device on the second gear, so that it is already moving when it engages. If it bangs into gear too hard it's going to shorten the life of the ratchet mechanism greatly. Lots and lots of detailed work. Well done.

[@MaNNeRz91]

It's like an oversized nitro RC gearbox Nevermind he just mentioned its based on that 😆😆

[@GaisaSanktejo]

Both Nitro and battery, friend. Though it doesn't seem to be that common in battery these days ;)

[@MaNNeRz91]

@@GaisaSanktejo battery don't tend to use gears (except for the main drive connection gears). I used to race the old brushed cars as a kid (30 years ago) and never come across geared electric. Nitro will have 1 gear for buggy racing. 2 or 3 for off-road toys. Motors have more torque than small engines so the need for gearing isn't so high.

[@GaisaSanktejo]

@@MaNNeRz91 As I said, thay are uncommon. I guess I should have expanded on that and said they seemed rare when I used to race myself (ironically, about thirty years ago too LOL). A couple of club members owned geared battery cars. I have no idea what they were called and they were comparitively ugly and blocky, but they MOVED!

[@MaNNeRz91]

@@GaisaSanktejo that's quite uncanny 😆 and I can imagine they're rare for a reason. Too much torque to be reliable. Adds more complication to the drive. Adds lag to the acceleration etc. Definitely suited better on an engine

[@GaisaSanktejo]

@@MaNNeRz91 I wouldn't know, what I do know, is that those cars were beasts and competed readily with top of the range cars of the time. As an aside, I always preferred buggies and those two were buggies. They were definitely wicked fast and good handling. I only recently got back into the hobby myself after some "nice" person stole my RC gear. It wasn't top of the range, but losing over £600 worth of cars, radios, batteries etc, which earned me second place in a local competition ended my RC days at the time

[@oldshovelhead]

Nice job Chris! Great video and build - I too agree, love the music!!! Got to say young man, I've been following for quite a few years now and everything you do just gets better!! Keep up the great work, solid props you are due! Big fan from Tropical Cleveland OH LOL 🤣

[@gasperplut9539]

I love the backround music😂❤️

[@matthewanderson7766]

Next level stuff always from you

[@samsgarage1716]

Really great idea I see what you mean when you use a thicker filler gauge 2 gear will kick in at a higher rpm. I can’t wait to see it in action.Great video

[@pondmonserfox]

That's a really interesting idea for a go-kart transmission, I hope it works out. Excellent choice of music by the way, it really added something to the video.

[@Zeke___Marsh]

Great music felt like I was watching a romantic movie 😂

[@awright9183]

Hey mate, another awesome clip showing off your skills with the tools you have. Who needs to buy parts when you can make them. Ya probably made that lathe ya using aswell...lol That is a seriously cool 2 speed box you've made bud. Hope alls well over your side of the pond. Keep up the awesome builds. Adam from Oz. 🇦🇺🙃👎

[@cinnamonrollypoly]

He actually did build that lathe. Pretty awesome. He has a video series on it here on his channel.

[@awright9183]

Yeah I bet he did, awesome to watch someone so talented in metal work. Its definatly an art.

[@kristinewilson5353]

@@awright9183 he is a genuis. Literally. If u want to see another talented young man making epic builds out of a little shed then I think you would be interested in Vasily builds. He's on you tube and he makes some amazing machines. Not to mention I think he's a teenager. Check him out if u like u won't be disappointed

[@awright9183]

@@kristinewilson5353 Hey, yeah your right Vasily is another awesome young builder, I've been watching him since his epic crash on one of his builds. Had to watch, but great he has recovered and back building again. Also cars and cameras and grind hard plumbing. All great young awesome builders to follow.👍 Cheers

[@joshuamorehead6124]

@@awright9183 I like what you did in your first comment, to represent since you're from Australia and you're upside down😂

[@fsanchezsmith]

This is awesome! Simular concept to centrifugal clutch.. Curious to see if it’s going to be a rough engagement. Keep em comin man!

[@sakaspuds]

wow, the music choice for this video big thumbs up

[@Djdaws123]

Just in case anyone was wondering, the channel he talks about at the end of the video that gave him inspiration for this transmission is JohnnyQ90

[@BrandonBurns1985]

dude! this video was very satisfying to watch! also this is genius man! great job cant wait to see it in use

[@jjhack3r]

Good choice of music. That transmition seems pretty straight forward. As long as banging that latch pawl doesn't break something it should be pretty solid. If i were you, I'd use a belt drive or some kind of rubber damper on the input shaft to reduce some of the agressive forces that might happen when it shifts Geared ebike hub motors use the same one way bearings and I've heared that daily riders have them wear out in a year or 2 and they just stop gripping but you should be able to get some solid fun out of it before that happens.

[@leadgindairy3709]

I could watch content like this for hours, awesome job creating that. I just hope it doesn't fail right away, it seems that little hinge has a hell of a lot of forces acting on it, but what do I know lol

[@craigcorbin4098]

Very nice video. I really like the different style and especially the chill music. Thanks !

[@troycrowder9942]

this project right here is an example of your work you dare to build things that most people would never even think about building so the never go any further you do and for that i see you going farther than most if you don't have it you build it i see people that have huge shops with all the tools but they lack one thing a mind that knows how to think of the next better way and the passion to drive you to get it done i wouldn't change a thing you are doing i think truly you keep doing things you're way and i know you are right you will be the best and i see you doing that great job buddy you are going places

[@christopherfolker4976]

Absolutely genius design! Can't wait to see it on a machine

[@msclawnmaintenance]

Awesome 👍🏻 The only problems I see are. The single drive pawl, yes a single pawl worked in an RC car. They don’t have to deal with all the weight as a vehicle your going to use this design on. Might need more then one drive pawl and the pivot pin for the drive pawl seems a little small. There’s a lot of force on that real thin pin. I see this design working with a few tweaks, 3 drive pawls and larger pawl pivot pins. Awesome builds 👍🏻👊🏻 keep up man.

[@fvpaquetqc]

The feeler gauge spring idea is really great!

[@aarongrabowski3775]

Nice job man. That is a really cool design.

[@waynebrown5428]

That will be cool to see in the testing phase!

[@stubby7934]

Beautiful machine work...always great to watch the things you can do (that I never thought of) on your lathe and mill. Great design. Seems much better than using a second centrifugal clutch that's just going to slip until it finally locks on that we mortals without machinery to build such devices have to stick with. It was your two speed transmission that brought me to your channel in the first place...nice to see it come around again, new and improved!

[@rcjourney8080]

Amazing idea. I see a big company stealing this after redesign... Keep it going Chris! Your builds are next lvl and machine skills are out of this world!!!

[@michelausderwerkstatt]

Awesome engineering skills, and a super chilly video!!!

[@7.3bronco]

You need a parting tool. They aren't expensive. Great job.

[@gucu]

This was a brilliant video, thank you so much. I thoroughly enjoyed the fact that I didn't have a clue what you were doing until the end!

[@RustyCarnahan]

I'm really eager to see this put to use on a go kart!

[@petroelb]

I enjoyed your choice of music for this video!

[@CMBProjects]

Love it!! Nice work!!

[@th3d3wd3r]

Was gonna say, just like an RC car gearbox. Good work!

[@joeyclark789]

Gonna be cool to see on a cart...I'm excited

[@iPrint3D]

Throw those bearing in the freezer for 15min and they will slide right in.

[@norsevikingsir4932]

They weren't milled to be pressed in, hence the key way. If they were then yes cooling the bearing or heating the housing would have been the answer. But they were milled just to be snug or else they wouldn't have went.

[@timothybayliss6680]

I've done it once replacing a crank bearing on a 2.stroke. The bearing went in the oven at 200f and the crank in the freezer as cold as I could get it with some fiddling with the thermostat. Dropped right on, no pressing and couldn't move it in 5 seconds.

[@Thewatson77]

Great stuff man. You’ve always been a little ahead of the guys doing similar stuff with your lathe work. Your machining skills shine in stuff like this 👍🏼

[@Ham_Strokers_Ejacula]

Keep up the content, running the second gear like a centrifugal clutch is ingenious.

[@backwardsmachining7526]

I love the concept I just worry about the strength of it. For an rc car yes but a go cart with some real weight and torque behind it i can see some stuff sheering. Can't wait to see it in action. Awesome video.

[@shinymud7]

Nice work. Love the music choise

[@Nick-PaiN]

Just like my revo! 👍 Frickin awesome

[@compassprecision]

Great video. Loved the background music to go with the awesome machining. Just subscribed to your channel!

[@jamiebouchard9862]

Sooo gratifying to watch a lathe remove material. My dream tool