750cc Cross Karts Gets Mufflers & Destroys Tires!

[@CarsandCameras]

I’ll admit it, you guys were right. Thanks for coming along for the ride! Next, quad carbs!

[@valerieshelton3953]

Yes

[@mauricedavis2905]

It's not the mufflers it was the collectors that did it 😎

[@deanishere7237]

Always be a favorite channel of mine... Keep up the great work !!!

[@singlebone]

why u did it to it like that, u just needet to swop your headers side and tunrd them up and it will be les problems and will look better

[@cobalt0681]

Now lets see how long it takes you guys to listen with the 2 stroke.......

[@leifhietala8074]

John's dad: "YER OUTTA HERE!" John: "Dad, you gotta try this thing." John's dad: "Okay, you can stay."

[@cbGamer481]

some one needs to send grass seed by the buckets full

[@Ratkill9000]

Considering theres a few dead spots in the yard, probably some shade grass is in order and maybe a yard of black dirt to fill in the burnout ruts.

[@camcarb3]

Yep. And in their latest video they're going full send with two carts around the yard. Seems mom and dad have given their blessing. 👍

[@0nzk052]

@@cbGamer481 jkkpok do you believe me now Gabriel Gabriel Gabriel Goodwill poop poopy LOL hobo

[@borginator1493]

Always cool to see good ol' Owen Wil.. I mean Charles! 😉

[@radarjoy]

He looks more like Ricky Schroder.

[@brettrandall5210]

Wow

[@ihavecrabs6765]

W O W

[@lylekehrer6159]

Them mufflers look cool on there, and being black, they tie in with the whole look with the pipe insulation y'all put on.

[@SVW1976]

There were times when I was skeptical about this build. Some of the choices for the cart I didn't agree with but seeing it at this stage proves I was wrong. Awesome job guys!

[@btpearce]

I cracked up when Issac screamed with the spider on his shoe hahahahaha

[@itsjustcam247]

A very manly scream, of course.

[@Shinyusedtoy101]

That scream tho lolololol

[@music10293]

That was the best part of the whole video!

[@garthnewman5859]

Reminds me of Homer Simpson's scream :D

[@MikeMayeran]

Try taking the Mufflers off and running straight pipes and see if it still runs good. Then you'll know.

[@zuestoots5176]

Nope. Those engines are very finicky when it comes to straight exhaust and aftermarket carbs. You kids need to learn some engine knowledge before you spew BS

[@ottersdangerden]

Simple test is a simple test.

[@motorcityracing7319]

@@zuestoots5176 you kids lol the guy your replying to probably in his late 50 or older judging by his picture

[@RaisingLionsNotSheep]

Those engines need mufflers

[@Paul7mac]

@@RaisingLionsNotSheep not for high rpm they need them on for low to mid rpm.

[@thomaspigg306]

I'm not a mechanic by any means but in 60 years I've learned that even with open headers you need a certain amount of back pressure just to keep the engine running and making horsepower. A great video Guys!!!

[@imagineaworld]

I think this is exactly how this thing meant to sound all along

[@mcsstudios101]

Those mufflers sound so good. You guys did so well on this. Loud is cool but quiet with speed and just hearing the ground and the wind is like no other. A different world silence is.

[@ajc894]

Now you have to find and fix the squeaking noise.

[@Ratkill9000]

Probably bushings are worn.

[@nodiggity7731]

the squeaking noise was the shifting lever by his arm you know the one they used before paddle shifters

[@toddb602]

They make line for that....

[@toddb602]

*lube

[@sergarlantyrell7847]

@@toddb602 Or just have proper pivots with brass bushings or bearings, make sure it isn't rubbing against the frame, and get rid of the wobble (maybe with springs). Using 2 cables instead of a bar would also be a good idea.

[@2earache]

Hey!! I used to drive that beloved double-decker bus in London a few years back and the guys at the depot were forever scratching their heads as to why a section had gone AWOL when they woke up for an early morning shift one fine day!! Thanks for enlightening me and solving the big question!!

[@hunterpetrovich1460]

So it likes a little back pressure eh? TURBO TIME

[@lorenmars8181]

BEST SOUND EVER. That's the coolest exhaust note youve ever built! 8.5K tach bonus.

[@BigB-qk6zh]

I want Charles officially part of the team

[@austinsantiago2039]

This is the best you guys ever did with a project. For one it looks badass, is fast, and you can power drift it. And I can see how it brightens your guys day just talking about it. Great job guys that's an amazing looking machine!

[@its_e123]

"And then we went inside and ate pie. It was good"😂😂😂😂😂

[@steverosenberger8671]

It looks like you guys have finally got it right. That is the best that I have ever seen the Cross Cart run.

[@LoneRevD]

'Its so quiet!' Yep, so quiet you can HEAR John running into a bush lol.. Back pressure can be your friend... ;)

[@Thisoneguyinaz]

Thank you guys, it sounds, and runs so much better now with the new 2 into 1 on each side. 😎👍

[@propaneandpropaneaccessori3446]

Just install cutouts. This way you can have it loud when you want and quiet when you need

[@williwonti]

I suggested this for the golf cart that disappeared

[@doublea9482]

You guys really knocked it outta of the park with the cross cart! And now with those mufflers it looks even better! Well done gents! Now, can we either see a hyabusa reverse trike or a go cart rock crawler? PLEASE!!!

[@austin4x]

Imagine what she could do if you took off those training wheels! Also, wd40 lol

[@hankdoral]

I notice Charles is the one checking temps, he seems to be a thinker. I like it when Charles is in charge.

[@deanishere7237]

Cheers from UK... p.s you guys got a tool for everything... I love it !!!

[@nandrews8412]

Big big fan of that stove pipe expander

[@SmOoThYwOoDy]

I haven't checked out CarsandCameras for a long time. This is by far my favorite build you all have done. Great job

[@Anonymous-oy6rj]

Put the stock carbs back on and see how it runs

[@chuckwalters4759]

Love watching this cart get better and better! This was my favorate build you guys have done.

[@nashguy207]

I'M sure Dad is going to be thrilled when he gets home and see's the yard LOL Did the police come pay you a visit or did the mufflers please the neighbors Hope everyone at cars and cameras has a Happy Thanksgiving!!!

[@grumpyoldman-21]

the neighbors where only complaining about them riding on the road/s

[@nickmccain6598]

Yea. Enjoy the thanks of go karts. Eat a turkey while driving. It ain't illegal

[@nickmccain6598]

@@adrenalinsam good 1

[@Acoustic_Theory]

At the end he said his parents came home and they drove the Kart in the yard, so they also took part in the lawn destruction.

[@mapquestHs]

That exhaust came out perfect!! Looks and sounds sooooo good. Nice job!

[@jeffconn722]

13:42 Charles's poor smashed finger nail. RIP.

[@grdray2138]

Good video. Two thumbs up to Charles for continually checking the temp around gas tank and muffler.

[@logankuespert6664]

Are y’all going to ignore the ducarti in the background when they went to check the ruts in the ground, I want to see the ducarti again, who all agrees?

[@vegajonathan99]

There is alot of flutter from hitting all the baffling in the mufflers but glad y'all got it running better. 👍

[@PKMartin]

At 8:23 left muffler is smoking a lot more than right as well, seems like more evidence you need balanced carbs?

[@2computergamer]

One of the mufflers has a catalytic converter in it. They need a crossover pipe or they're going to always have that problem

[@crazyeyez1502]

Why would only one muffler have a catalytic converter in it, and not the other? Those mufflers came off a VTwin, and each bank has its own separate exhaust pipe. It would then need two cats..

[@karbaona]

Gabe Vogel usually the insulation wrap is what makes it smoke like that

[@michaelstewart7973]

Or adjusting the valves

[@sheldonhall4572]

I like the way Ike thinks, who needs mufflers? Lol. I agree, merely a recommendation not a requirement lol. Im sure your neighbors appreciate the cross cart purring like a kitten. It would be cool to make an open valve piece to the exhaust that can be opened or closed when you really want to hear all 10 thousand rpms in a less populated area. Also if the fuel tank does get too warm near the exhaust you could always make risers on the base and attach it to the chassis to get it above the mufflers. I don't think it will be necessary but something you should definitely check periodically during longer periods of testing ;) Awesome build, probably my favorite so far.

[@preetamdasika7636]

17:17 manliest scream in North America

[@alstone5257]

By far my favorite Machine you guys have built.

[@rjinator7447]

Probably already addressed but does your fuel tank have a vent? without one the carbs will pull a vacuum on the tank.

[@ollilehtonen6764]

It does

[@lorenmars8181]

Good point. Nothin get's by these guys though. Well, usually!

[@Rekonmoottorihiomo]

@@ollilehtonen6764 moi

[@ollilehtonen6764]

@@Rekonmoottorihiomo terse

[@mingusbreeze]

I had a Honda 350 F that had headers on it and one day I got a wild hair and opened the headers up. Sadly it was loud but ran like crap. Thanks, guys as always I enjoy your videos.

[@fuckheridid420]

Charles is pretty cool 🤘🤘 can tell he has some knowledge in the brain of his 😂😂🤘🤘

[@66tbird1]

Glad to see the new coils and wires. Now we've both been down that road.

[@BarnyardEngineering]

Next step: Make it road legal.

[@twisteded8036]

Well done boys good to see it running better. The 4 carb would make her run better than ever. Once again well done.

[@dieseljett1]

PLEASE for frickity fricks sake, PUT THE OE CARBS ON!

[@rjmdnw6343]

Word

[@robelston6390]

The sock trick a few episodes ago told them that they needed more fuel. Jets are way cheaper than building a new intake. Just saying... And mufflers.... Yall started off so well, and then just forgot the rules of old motorcycles I feel like i should start a youtube channel for the dark arts of carbs. No jet change, no carb balance, like one plug check. Changed the whole system and wonder why they cant figure it out....

[@Steven_McCrae]

Guys i just want to congratulate you on this fantastic machine youtwo *BUILT FROM SCRATCH* and she is running better than she ever ....oh and thanks for the amazing content too haha take care guys Love From UK

[@R1Flem]

It’s pretty evident that John has no real driving ability.

[@Zark-Muckerberg]

Yeah, crashes into bushes 3 [separate] times.

[@R1Flem]

Zark Muckerberg for real. You can’t steer if your locked up. No throttle control. Just wide open all the time.

[@IamJoeTV]

Among other things lol

[@xFinanceManx]

We been new

[@nashkar6561]

It's is a custom kart 2 with Miata parts lol can't be too hard on em

[@coronadrvr9863]

It’s about time! The lack of mufflers was killing this thing. I bet a 4-1 setup would run and sound amazing

[@carlharrelson4887]

I think y’all should build another lawn mower

[@TopAnimeGuy]

Gotta love it when you make a project quiet and it doesn't loose any power. Its even better when you GAIN performance! I think a top speed run is in order.

[@johnmorgan1629]

As the sheet is from the UK, shouldn't that be Aluminium?

[@2587scott]

I have watched a couple of your videos on the cross kart and have been thoroughly entertained. But gentleman, i have to let you all know, when the big guy screamed like a little girl from the spider crawling up his shoe.. that was the moment i knew i had to click on that subscribe button, hahah. Sincerely, we appreciate what you all do and the hard work that goes into it. And if you ever find yourself in the midst of a shitty day, just build something great around it.. or you could just remember Ike, screaming like a girl at a Justin Bieber concert.

[@harryconover289]

Do only only one thing at a time plugs , wires exedra it’s the only way do know but it’s much faster to do it all at once and not learn maybe next time ?

[@trail-tr2ql]

Harry Conover somebody suggested to take the mufflers off now and see what happens, I’d be curious to know aswell

[@robelston6390]

O.P. posted The rules of old motorcycles

[@kramnal13]

Glad to see that thing running like a champ.

[@richardblom9211]

I thought my phone sound was turned dow for a second...

[@malidene]

Love this video, that cart needs to be built as a kit build. Man it is sweet. Great job as always!

[@norm1233]

100% that 440 2 stroke cart will beat this crosscart

[@jamesblanco4843]

Norm Idk about that, if it had a gearbox mabye but its still not producing enough hp

[@RaisingLionsNotSheep]

Yeah that won't happen

[@norm1233]

@@RaisingLionsNotSheep you fail to realize two stroke 250cc dirt bikes compete with 450cc four stroke.... Don't get fooled cuz one number is bigger

[@norm1233]

@@jamesblanco4843 yeah with a equal gearbox I should say

[@McDoobles]

Hah. I have a 98 CR 250 and a 2010 CRF 450. There is ZERO competition. That’s an uneducated opinion if I’ve ever heard one.

[@KeatonsCarlott]

You pulled it off. And yes. Your on the rt tracks. Finally, a solid win. Keep it up .

[@joakoc.6235]

Thats too silent, maybe some speed holes in the mufflers would be fine XD

[@TheDr.Magnum]

I have a feeling that things are gonna hit new levels over the next few years with yall

[@jennifergregory9767]

I knew it needed some exhaust. a little back pressure goes a long way with those engines. I had an old cb750 and when I straight piped it it never ran right. It bogged and miss fired just like the cross kart. So glad it's doing better.

[@johnstrickland8788]

So I shows this to my kids.. After Thanksgiving, got to go get some tubing. Great job guys. Really enjoy the videos.

[@kenwinston2245]

exhaust tuning to aid in scavenging the pulses out at a certain rpm range used in high rpm engines like formula and Indy cars, looks like you nailed it! what a sweet note 😃

[@thelonewolfesoldier]

Everytime you work with these two guys all I can think is, wow owen wilson and will ferrel are so nice to help this kid out with his go kart XD. Love it though you guys always send it super hard, keep doing what you are doing !

[@bobwhite5440]

engine sounds good. probably improve even more when you get the matching carbs and check out the mufflers to ensure they are identical internally.

[@bitterend2603]

Love the build guys. Keep up the great work.

[@CR4ZYxRY4N]

Awesome balance of sound and power

[@FeArhsma21]

Yep, back pressure it's a thing. Hey God Bless you guys, great job!

[@n20cpri]

Man that thing is shaping up nicely! AWESOME!

[@lefthookdemolition7495]

It's so much better ! Good job.

[@droneman3163]

Dude with the ideas you said at the end you just took the fun outta it

[@GordonPrice]

Cardiff UK based fan! Love your videos,

[@Jason-vx4eo]

Wow.. what a monster. You guys always got cool stuff going on. Thanks for sharing with us.

[@collinmartin1286]

How do you guys not have a million subscribers yet!

[@kcav5374]

That thing is bad ass! Now I REALLY want to see it at the drag strip !

[@CH-gq8es]

I was watching cars and cameras behind the scenes then this came up now just how lovely of a Monday morning

[@philiprowney]

4:20 - We hear you in the UK and love your do. #shoutOut

[@GodschildinNC]

Nice work!! Glad to see it all coming together so well!

[@davidbullard6472]

Awesome guys, next project... fat cat build out of old three wheelers please. Love the videos

[@whatsinanamethatthecaptive577]

Back pressure only helps 2 stokes since the exhaust is open during the start of the compression cycle. With a 4-stroke engine, the valves are all shut during the compression stroke, so you don't need any external pressure to get good compression - the cylinder is effectively sealed. What may have helped is the header you made going into the muffler, a good header will create a vacuum in adjacent cylinders to "suck" the exhaust out so it doesn't need to work so hard to expel the exhaust.

[@rimshot223]

Glad to see you got it sorted out!

[@norsevikingsir4932]

It's amazing what a little back pressure can do.

[@richc9503]

This thing is my favorite build from you guys, close second is the rail!

[@jerrywyatt3144]

Love the longer vids keep it up you guys have good projects

[@AmraphelofShinar]

I'm sure no one will agree with me but the mufflers are a huge improvement. It sounds so much better.

[@upsidedowndog1256]

Ike's belly laugh is a great way to start a video. Inline 4s really respond to 4 into 1 exhaust but I have mentioned that before.

[@jberry1982]

Nevermind y'all did exactly what I wanted to see on there guess I need yo watch it thru b4 typing out my useless comments sounds great to

[@TheRedMenaceR]

I think you could open the mufflers up a little bit, but I'm glad its running great. Cant wait to see it with better tires too!!!!!

[@jaredbudzinski8434]

You’ve mentioned a third snowmobile engine is in the mail. Looks like this big project is about wrapped up. Time to make a mini rock bouncer!!

[@cocacola3452]

The Harley mufflers add to the Storm Trooper look. Great Job! Watch out for the itsy bitsy spiders.

[@BigT27295]

Thanks for the journey...

[@owenbame1131]

It looks awesome with the muffles like that

[@paulhooker8248]

Having owned several Honda's they do a lot better with a little back pressure on the exhaust. Good to see the mufflers

[@fredericrike5974]

Maybe tying two cylinders together is having an extractor effect? Several different tuners built four into two headers, four into ones( I think those had the best top end but weren't strong out of the hole). Isaac, you said a mouthful- many things were changed at one time. The CB 750 stock came with a two into one on each side, with no crossover, so I;, tempted to think the stock carbs want a good go through and a try- the factory handbooks had the start settings for the adjustment screws. Wow- it lit up and went stealthy! If you leave it not running for any period, I'd be sure to drain any moisture that gets in the pipes out- your mufflers are higher than your exhaust ports.FR

[@poopyhead8358]

Not gonna lie that kart looks awesome in white and black great choice of color scheme

[@angryclown1990]

I hope this helps: Internal combustion engines do not need back pressure in the exhaust. Back pressure is litteraly the opposite of what you want. An IC Engine is an air pump, the more air it can move, the more power it makes. If there is back pressure in the exhaust, that means the exhaust is not efficient. High performance exhaust systems REDUCE back pressure. Why do you think engines make max hp through open headers? Race cars don't have mufflers and have as few bends in the system as possible to eliminate back pressure. The reason mufflers help small engines run better (when they aren't modified) is because they are designed to add a scavenging effect. The double wall pipes, the inside design of the muffler, and the shape all work to create a vacuum that pulls more exhaust out of the cylinder, keeping the plugs cleaner and making more room for fresh fuel/air mixture. Ever seen an H or Xpipe crossover on full sized car exhaust? Same reason, it's to create that scavenging effect. You NEVER want the exhaust gasses to be backed up, restricted, or moving toward the engine. You always want every bit of the exhaust to move out of the engine and away from it as quickly as possible. And no, diesel engines don't need back pressure either. They may use compression to ignite, but they are still IC engines. Engines DO NOT need back pressure.

[@tkskagen]

Glad to see that your Parents enjoyed "The Build"!😻

[@sadelcol]

Been saying it for a while that engine wasnt allowed to have the scavenging effect that multi cylinder engines love. Glad to see you put an exhaust on it and I bet if you pulled off the exhaust it would run like crap all over again

[@Unending_One]

It is now my favorite build. All you guys need is to figure out how to make an accurate speedometer, get slightly bigger back tires, and just slowly upgrade and tinker on it. My old favorites were the Black Widow and the Murray, but now this one is my favorite (other two a very very close 2nd).

[@mainemakersgarage5266]

Of all of the tools and equipment you guys have I can't believe you don't have a heated ultrasonic parts cleaner for carbs. My experience - Had a set of 4, cbr600 carbs that have set on bike since 2011. Complete disassemble and "manual" cleaned 5X w/ no success. Last and final attempt used a heated u.s. cleaner and engine now runs perfect.