Twin Engine Go Kart First Ride | Shaky Self Destruction!

[@leemer1]

Lathe tip: at 6:02 in the video your round stock is sticking out too far from the chuck to get a good surface. You have to either move the round stock in closer to the chuck or pilot hole drill the face of the piece and support it with the live center in the tailstock. Theres too much deflection with the material that far out of the chuck.

[@TylerSmith-cm2sw]

2 to 3 times the diameter for material stick out as a general rule

[@CarsandCameras]

Lots of moving parts in this build!

[@broo_sh]

yeah its have but can it wheelie hahaha

[@jimbagle.3939]

I feel like you should either make sure the power strokes are alternating. (When one engine is TDC, the other is at the top of the exhaust stroke). Or install a centrifical clutch on one of the engines.

[@kelso840]

Put a hose clamp on either side of the sprocket so it can't move laterally and you'll be good to go. Set screws are............. screwy.

[@kelso840]

@@NubsWithGuns a clutch on one of the engines is actually a really good idea.

[@georgeau2523]

Even the parts that are not meant to move

[@tomdrzewiecki]

You can't run two engines tied to one jackshaft directly. One engine will be fighting the other all the time unless you can get them synced together perfectly. Right now if one engine is running at 3600 rpms and the other is running at 3500 you will continue to break parts like the master chain links, shear keys, etc. To run two engines like that each should have a clutch which will allow the one to slip a little.

[@jasongardner9127]

Pretty sure each motor still has the centrifugal clutch on them. The last time they did this they left them on .

[@jatomic7793]

except they cant spin at different rpm.

[@rushking19]

@@jasongardner9127 re-watch the video there's no clutch

[@inspireonex]

@@jasongardner9127 7:29 no clutches on engines

[@jackpike9337]

Yes they think you double hp! Maybe torque but not horse power....

[@wags9777]

Word of advise. When turning longer pieces of metal, it's best to use a center in your tailstock. It will minimize deflection from the cutting tool. Without a center, especially on smaller diameter materials the material will push away from the cutter. You will end up with a taper or get chatter without a center.

[@krisley5178]

That sliding park job by Charles on the quad was epic! 👍😎👍

[@carfreak201047]

Its his quad. Doing what one does in slick mud as they should.

[@Knee-ko]

11:43 - Zip Ties and coat hangers. Quintessential C&C. And we love it !!! 👍👍🤣🤣

[@byron7165]

"This feels kinda natural..."

[@christiancooper478]

I'll say that I agree with that statement

[@BarnOwlProject]

Had me dying.

[@michaelmays9292]

That should be a sticker ,its not stupid if if works

[@nathanhelms1674]

@@michaelmays9292 I’d buy that 🤣

[@oscarzt1652]

23:04 that was a satisfyingly executed slide right there

[@jdmjedi777]

Perfect time to be home sick and just relaxing on the couch. Thanks for the upload guys! Edit (I'm just a couple minutes in but I believe some boat throttle cables are push/pull style and might work better as a shifter cable)

[@27Zangle]

Hope you recover and feel better soon.

[@Jay-lc1nh]

Thinking the exact same thing when they left the shop on the 1st run.

[@rugbyguitargod]

Same here; laid up sick with my 2nd round of COVID watching this episode!!

[@ProbeGT2]

The level of jankyness is what makes this video so awesome.

[@ralphhondaman]

Not only will the motors vibrate but the "transmission" you built is going to vibrate a lot. By cutting the rod and piston off that's going to throw it off bad. It's balanced to have both. And if it has a counter balance weight that's even more rotating mass. But its definitely a interesting build. Can't wait to see it dialed in.

[@hunnybunnysheavymetalmusic6542]

The best solution would be to pull the crank entirely out and put just a shaft through there, but that might not be remotely easy. Another way would be to pull off all of the central crank, pin and throw parts, and bridge the 2 ends [one with the spline and one with the transmission gear] with one heavy piece of tube slipped over it. Then take that, put it in the lathe to clean off as much imperfection as possible, then put it on a set of balance pins and grind or tack just enough weight to get it to neutral balance.

[@NVMDSTEvil]

"trans" vibrations probably arent too much of an issue. Engines being out of phase I believe is the largest issue.. and the keys falling out. Hose clamps work wonders with the keys i've found, often have issues with them falling out in swing-augers on farm.

[@rushking19]

@@NVMDSTEvil the trans vibrations is an major issue. That's one of the reasons the last set up vibrated so bad . You have an crank that is out of balance being driven so yes it will be an issue that along with the engines not being in sync, being two different displacements and having different hp's and having a clutch just adds to the vibration more .

[@ralphhondaman]

@rushking19 that was my thoughts exactly. It's all balanced for a reason. But now by removing the connecting rod and piston then turning the engine at thousands of rpm. Something will give at some point.

[@Videoswithsoarin]

the piston being removed would reduce vibration but since the rod was removed the crank is no longer balanced

[@noahwinston8546]

not gonna lie the scenes when charles is shooting by himself are some of the most entertaining lol

[@Bucky15690]

This is a awesome build, the jackshaft is a great idea. I wish there was a jackshaft that could kinda have a differential on it. So your engines didn't have to be so in sync.

[@clintonmcnair5447]

Yes they do need to be in time both firing compression stroke at same time or 180 decrease out they basically have the crankshaft of both engine hooked together couple of good cart clutches would do away with All that shaking

[@jrkbgk1111]

@@clintonmcnair5447 that's what I was thinking, either centrifugal clutches or cvts instead of just going straight sprockets, would definitely help with the vibrations, or at least you would be able to start one engine at a time instead of having to do both at once.

[@clintonmcnair5447]

@@jrkbgk1111 centrifugal be way to go don't really need torque converter with the 4wheeler transmission

[@Videoswithsoarin]

@@clintonmcnair5447 the engines should not be in sync they need to be 180 degrees out of phase ti minimize vibrations because they will cancel out. one piston up while one goes down instead of both going up and down simultaneously. adding clutches is not going to affect the vibrations whatsoever

[@Videoswithsoarin]

@@jrkbgk1111 adding clutches is not going to change anything with the vibrations

[@dukie1616]

At 23:00 to 23:05 Charles pulling in slide with the four wheeler to pick up Isaac and John’s chuckle behind the camera😂 All classic CarsandCameras fun👏

[@BIllMcCambridge]

Cool build, And this just shows why manufacturers build integral engine and trans missions. But I love the Mad Max like quality of this build. Thanks for sharing y'all's adventures!!!

[@nickkelless]

That slide with the quad was perfect 😂😂😂

[@Canadian_Craftsman]

Would LOVE to see 4wheel drive!!😁✌️💚

[@NVMDSTEvil]

hose clamps work good for holding keys in

[@happyrootsfamily1276]

You need to balance the gy6 crankshaft it will cause extreme shake due to the piston and rod being cut off or add centrifugal clutches to your drive engines it will help also I've built off these gy6 transaxles a few times

[@Videoswithsoarin]

how would adding those clutches change anything? its not going to help vibration its redundant they already have a clutch

[@happyrootsfamily1276]

@@Videoswithsoarin they will allow the engines to self sync the offset balance of the rotating assemblies if the drive engines themselves

[@MarkValascun]

I feel like you guys could whack together a coupling for the cranks. So keyed on one side and attaches to where the pull start ties into the flywheel? Would that not be much better than throwing/snapping a chain once every 15 mins?

[@marvicty]

Charles is a hoot!!!

[@lonewolfandcub668]

I come for the jank and stay for the Charles lol

[@gavincline209]

Ike’s whole demeanor in the opening scene is just perfect and his whole transmission comment is golden! Lol

[@doonular]

Dual engines could be a big advantage for trail riding or for younger drivers. Where each engine connects to the first jack-shaft, if you could make something that would work similar to a pull start that only allows force in one direction, and free-wheels in the other, you would gain at least 2 improvements. The first would be that you could start the engines individually without overloading the pull start, and second, if 1 engine were to die out on the trail, the sprocket of the dead engine could free-wheel and the running engine would not have to drive the load of turning over the 2nd engine. That would allow you to still operate on only 1 engine and hopefully not leave you stranded. You'd also have the option of operating on either 1 of the engines at any given time, limiting power, say when a young driver was at the wheel.

[@YardworkWithJohn]

OK here's my idea for how to deal with starting a two-engine kart: Have the right engine connect to the jackshaft normally with a normal pull cord. Left engine will have no pull cord, It will connect to the jackshaft but with a clutch you'd control with a lever. With the lever down, Left engine would be disengaged. Push it up and it would connect the clutch and now left engine is connected. So to start, you'd put the lever into "disconnect", start the right engine. Once it's warmed up, slowly push the clutch lever up so that the right engine starts rotating the left engine. Lock that lever down and now you have two running motors!

[@gordonlovelace7406]

To much going on! I love the concept, drop the twin engines and go with a vtwin. With your experience with the 670 it would be a blast!!!! My buggy has a Chinese gearbox but there is no way I could have this much fun!!!!!!

[@Casualplayer]

Yall need to ditch the 2 engines and go for a built 670 build again!!!!.would be EPIC

[@rightnowracing]

“This feels natural”. John did in fact NOT cut that out. 😂😂😂😂

[@SilliiBillii]

Ohhhh dear 😂well said Charles

[@outdoorsmandaily9181]

Him sliding in on the 4 wheeler cracked me up!!!!!

[@troydennis9449]

Trim off the ends on the live axle link, it’ll take out some more vibrations. Looks like they are a little uneven and vibrating the whole thing. Love how it’s coming along and love what you guys do!!

[@geoffburrill9850]

That must be one of the most complex projects you have built. Looks good. Can we see more of the Opel Gt.

[@CarsandCameras]

We’re waiting to post until we have a bunch done, it’s turning out AWESOME so far though

[@kevinAuman1]

My boy Ike is thee greatest backyard engine-"near" there ever was imo because everything ya'll build is either "nearly" running, "nearly" blown up or "nearly" perfect! I really just wanna hear him say "damnittt bobby" just once though hahahahaha

[@Drunken_Hamster]

>Leave the 5th wheel thing as is and use it for 5th wheel things. >Time the engines 270 out for it to sound like the drag rail, or 360 out to sound like a BMW boxer twin. 180 out is a solid meh IMO as far as sound, but you can also just do what you want; it IS your kart. The 360 will also be the simplest as far as the single turbo setup, or just plain timing it for proper scavenging or a single carburetor setup in NA mode. >Use ORANGE Loctite instead of blue or red. It's stronger than blue and made for vibrations, but can still be removed without heat. I have the orange stuff on my truck's driveshaft for over a year with zero issues. It's the offbrand stuff at advanced, though.

[@No1414body]

Ike and Charles are twins from different moms

[@musicauthority7828]

I suggest nixxing the twin engine arrangement. and going with like a V twin, or a inline four, or a V four, or a snowmobile engine. those twin engines seem to be working against each other.

[@aidanworthington]

might be good to put a twin belt drive on the primary to smooth things up . those chain's wont last too much lash when the engine fire

[@crazylife6319]

you guys seem more bonded, like a brotherhood now. more than before for some reason. hope all stays well

[@Videoswithsoarin]

i hope you guys have the engines 180 degrees apart to minimize vibrations. also in previous videos you put tape on the lock rings to keep the set screw i hope you havent forgotten!

[@tinygaragepowersports0122]

Even though it was a temporary setup "For testing purposes only" I agree that the cranks need to be synched dead solid good or clutches installed. The harmonics are breaking the parts. Definitely one of the funniest videos so far! :D Loved when Charles slipped in the mud. What is the model of Charles' Honda four wheeler?

[@Videoswithsoarin]

the engines should be 180 out of phase not synced that way they can cancel eachothers vibrations out to an extent. adding the clutches wouldnt do anything

[@byron7165]

Those duster cans don't contain much CO2. Most of it is a variant of Tetrafluoroethane. Depending on the duster, don't automatically assume that it's non-flamable.

[@martinburgess4814]

You guys have such great builds and ideas.Keep em rolling rolling.

[@dblizz68]

The maxi bike idea was cool. Kind like an extreme Rokon. They have some big tires/wheels but those would be massive on a bike.

[@DaveHiggoHiggins]

This is true carsandcameras jankery. And I love it

[@Brock_Landers]

Either two single cylinders, or a forged, bored and stroked v-twin...The mini dragster y'all built is an absolute work of art, but a fun offroader would be awesome with a crazy 50 HP v-twin that can do wheelies. It still takes ALOT of work to make two separate engines work in tandem.

[@trblemkr1d106]

That Opel GT you have on the lift brings back good memories...it was my first car in 76' . The chasis is better than most people think ( don't change it ) . The motor is good and faster than any MG or Fiat . One flaw is the stock carburetor..It's junk ( go with a Weber ) . The transmission is okay unless you are a gearhead 16 year old like I was . Replace the rear exhaust pod . With the rubber hangers it's noisy and will break ..with a solid mount it will crack the exhaust and make tractor noises . I put my 73' through hell ( I was16 ) and ran a damn good race against a 280Z in the twisties . But he pulled me on the straight at the end . Buuuuut ...I caught back up when I pitched sideways on gradual left turn ( used a little inside gravel and drifted into the right lane in 4th gear ) yeehaaa! Then lifted all four wheels over a slightly lifted concrete bridge . Now ...here is what stumps me . I ( Dave ) was smiling ear to ear . The guy in the 280Z seemed a little preturbed and squeeled away !?? Then my friend Ray was yelling at me in an octave that made my ears hurt while trying to pull his fingers out of the dashboard! Huh...go figure , I had a great time... This was at a beautiful piece of twisty blacktop we called Sleepy Hollow outside of Louisville Kentucky. Good times..good times . PK

[@theupscriber65]

Lathe tips: never use a file without a handle, always push sandpaper into the part/don't pull sandpaper (if it grabs you'll smash your thunb), 2x distance equals the square root of rigidity, make sure you have an estop near the operator, sfpm for cutting cold roll steel with toolsteel is about 100-120 sfpm. You calculate rpm from sfpm. Chip load should he 2-4 thousands per revolution on an old lathe. Larger nose radius will give you a better surface finish. Increase your relief angle as the material gets harder.

[@1one3_Racing]

Just for fun, make a forward control four wheeler. Like, pretty much a standard quad bike, but you sit out in front between the front tyres. It would be a crazy experience

[@bryduhbikeguy]

With the 'Tag axle'..you can turn the rims inside out,and build a sprocket for the wheels,add chains from drives to them like portal axles and make a mini-Monsters cart,or 'Swamp Buggy' by taking a front 'straight' axle from a 5 ton and flip it upside down to get clearance like a reverse drop axle.?/It doesn't matter if the shifter doesn't work well,as long as it works for proof of concept.

[@SongLyricsHD]

9:36 that is an interesting concept 😂

[@TheSonofruss]

You guys are having way too much fun it definitely needs some rear fenders to keep the mud spray better controlled

[@gooberclese]

We add a spring when the cable needs to push. Spring pulls while cable pushes. Easy system rig up.

[@gqp4800]

Glad to see you guys get a lathe. Lathes and mills, surface grinder,drill presses are cheap now that no one uses them. I am an expert manual machinist/ master well driller. Former occupations before retirement

[@thinkingmanhillbilly]

You need the right "T" nut on your cross slide on your lathe, if you take a big bit on something your tool post may jump off on you.

[@wags9777]

Use short set screws. That way you can install a set screw on top of a set screw. One stops the other from being able to back out

[@tylerwatts1004]

Twin engines is looking good. I strongly recommend you time the 2 engine strokes so you have them in 270° or 360° phase of the power strokes so they run smoother on the chain, less noise and they will give a cool v-twin or twin cylinder sound. Chains looked a bit tight also.

[@comethiburs2326]

i say this needs a balance pipe for the intakes, a form of light signal telling if one engine quits, and a 2 in 1 header. A starter and alternator assembly mounted between the engines would help, too. and individual clutches for each engine. wont shear anything that way.

[@K3NnY_G]

16:00 I mean, that indent is exactly where it's supposed to hook, it's not exactly intended to have a clamping load but it's honestly mint.

[@masoniain]

Instead of pre-Charles, it should be BCE - Before Charles Era.

[@804_Rider]

Cars and cameras video for the drive home from work? Yes please!

[@terminalpsychosis8022]

This may be the best multi-motor machine you guys have built. Ok, the 3 in a row drift bike was pretty cool. This one actually has potential to be really impressive. what 400cc+. It's big, but beefy and nice travel. Could be a contender if can sync the motors.

[@Sloppyjoe96]

yall should build something like this but with a fully functional motor, like a working running 400/500cc atv engine

[@donaldhalls2189]

Guna try ya, looks like it should be a lot of fun when you get it worked out, all the best to yous and your loved ones

[@Xxjoker21xX]

The two Different Engines are putting undue stress on everything it will just keep destroying its self until you put identical engines or just one Big one!

[@byron7165]

@15:56 IKE! How did you miss an opportunity to say "For testin' purposes only"?

[@topfuelkustomz3729]

😂😂😂

[@WesReneau]

An idea for the engine plate chain adjustment. Over time I’d think that nut/bolt combo slips. I think a turnbuckle in either side with a ham nut would be more reliable and provider for easier and more minute adjustments. Great build regardless

[@darrellkelly7614]

Best moment ..Charles's Nad splitting slip n fall

[@ThaVoodoo1]

Great Build!. Twin digital RPM Gauge would go well.

[@reddog543211]

Keep diggin guys.....she's lookin good !!

[@zmac7467]

It would be a neat project to build a dump trailer out of Ike’s auction purchase. Definitely something you’d use on the farm.

[@davidkilbourne5422]

thanks guys! I hope you all get er done!

[@robsmith1752]

Cool build can't wait to see it in full swing

[@gfrankum63]

The twin go-cart build is a riot so far, but the Opel GT has me intrigued, especially since you have that wrecked Miata nearby.

[@oldman9161]

when johnny is away the boys gonna play..... 2X4 shifter..... with the wood adapter kit LOL

[@Njf4192]

The reason I liked the video is because that sick four wheeler drift park 23:00

[@cboudreaux1011]

The 300 model that yall have should have 3 different low med and high ranges. Also if the front diff is shifted past what the cable limits it will have a lock diff position. They use parts from Suzuki bikes.

[@henkoosterhof5947]

About your torque convertor or motor. Every time you start up its generating heat because of higher power needed ( called inrush ). Wait a bit longer or try to find a motor thats suits your powersupply I agree with the remarks about the material in the chuck. If you get it working clock the engines 360°. 1 tdc firing, the 2nd one tdc exhaust/inlet. Put 2 motors on that dolly. One on each wheel.

[@SocketSlinger]

You can do a industrial hydraulic drive between both engines and actually make more hp. I did it with two 3.5 Briggs flathead engines years ago. When one is one TDC of compression stroke the other needs to be on exhaust. The pause traction yard cart I had the setup on would fry the original yard tires off. I could only imagine what these two would do if they were in sync with each other. My setup was with a single 8 hp updraft carb and two exhaust. I also used aluminum flywheels because between the two there's no need of the extra weight to carry the engines to the compression stroke. It would rev to 9,000 rpm in seconds. I also used heavy springs and home ground cams, along with match and flow porting and valve replacements from a 4 hp bb. It was fun though. I was 15 at the time and had endless supplies of engines and my dad's machine shop, being I opened my small engine shop at 12. I'm old and broke now but would love to do two of these newer ohv engines like that.

[@handiman5001]

Not finished again -- John has to learn to finish things to show that they can make a great machine

[@moonlighthaze222]

What’s happening is the engines have their own spikes and drops in rpm in a single revolution. this is transferred through the jack shaft as a back and forth load. When this same Principle was used but with less parts like the multi engine mini bikes there was less to break and it lasted what yall put it through. This has more stuff to break between the engines and isn’t suited to the constant differing loads. Possible syncing the engines might help this but won’t solve the issue completely as there will still be random differences in torque between the engines. This is why multi cylinder engines share a big chunk of metal (crankshaft) cause that piece transferring loads needs to be very strong.

[@Robert-ni6ut]

Great viedo. Would love to see the maximum bike 🏍 built out of that old trailer 😀

[@trashsmithfab]

“It ain’t stupid if it works” “I say we try it” Please put this on some merch!

[@Sladedevman84]

That thing is super sick!!!

[@twocvbloke]

With the way it's set up in the transmission, that thing'll be a true boneshaker, and nutshaker, and brainshaker, gotta swap the former crankshaft for a straight-shaft to stop it vibrating itself apart... :P

[@seanbragg1696]

And you can probably add starter too jackshaft or just weld nut too jackshaft and use drill since you can put in gear

[@nobodycares85]

With your two engines, if you had a clutch on one, you could start it and it could turn the other engine over when the clutch engages.

[@rephlexc]

Oh man, this is a sweet build guys. " We don't even know if the transmission works" haha.. Classic.

[@jhh8688]

use bolts drill holes in the head and run wire thru it works and keeps set screws in place

[@lewfec7336]

Could be an interesting build to do a side by side mini ramp truck as a rescue vehicle for the next big event you guys do. Wether it be 4x4 or rwd as long as it's still compact to get through trails and sturdy enough to carry 2 people and a broken down kart or bike on the back with a winch.

[@TheBiliken]

Lol! This feels kind of natural! That one will be around for a long time. Hilarious!

[@DJswope73]

One of the funniest ones in a while🤣

[@jamesbeemer2477]

I would install hydro pump coupler’s to the engine drive train to help cushion it against all the vibration.

[@scotthartwig7190]

Just to hopefully remove the idle shake issue, I'd put cheap clutches on the engines to get them to have some give between them and the transmission, or to make it simple, use only one engine so the jackshaft isn't constantly fighting itself. I agree the two engine design is cool, but the twin engine is always going to be fighting itself unless there's some give between the two

[@leokline3541]

You need centrifugal clutches on the engines so they can run independently. They have different power and rpm's. Right now they are fighting each other.

[@derschwarzgeist]

Centrifugal clutches wouldn’t change anything past the engagement speed. What they need is something like a viscous coupler, or a coupler like what is used to connect hydraulic pumps to motors. Or do things the smart way and use one damn engine.

[@WingmanJohnny]

Once yin's guys finally get all the kinks out of the spleen machine. It will all come together and be super cool. Keep up the great work yin's guys

[@speedpartsKomets]

Wrap your sprockets where the set screws keep coming out with electrical tape. Use a small drill (where the set screw hits the shaft) using the hole of the set screw as a pilot for drill, drill slightly into shaft allowing the tip of set screw fit into recess your drill made in shaft.

[@TheREALScooterJesus]

the next project should be a kart you can use for filming your builds driving around that has crazy good suspension and is made for filming from, is quiet, and can tow any broke down vehicles.

[@hunterchartrand6646]

The piece of 2x4 hits close to home haha, the 670 in my boat is mounted on a piece of pressure treated 2x6, hasn’t failed me yet 👍🏼

[@robertfriedrichsen6273]

I would suggest putting centrifugal/over-running clutches on both engines so if one engine is down a little, the other isn't being drug down with it. Also easier starting and less wear and tear on the rest of the equipment.

[@teagzy07]

Definitely want to see more out of the dolly trailer. Mini bike as mentioned or put a wide front,a body of some sort and a 670 on for a mini monster truck or drag car

[@jasonpetrich4141]

I think it's time you call this thing the black pearl!!! Cuz its cursed and I believe you guys might be some great go cart pirates!!!! Let's go black pearl!!!!!