Racing Dirt Bike Engine In A Home Made Mini Street Quad First Test Ride - Part 3

Today we are building a mini street racer quad with a CR 125 two stroke dirt bike engine. the dirt bike engine makes around 36HP so this thing is going to be FAST! its definitely going to need a wheelie bar and some good brakes. I'm taking inspiration from an old project called the mini green atv that I built years ago. I want this mini street quad to be similar to it but much faster!
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[@matthewf1979]

That Arc Droid plasma cutter is ingenious. The ability to trace your design is the best thing I’ve seen in a while for the home shop fabricator.

[@denisnekrasov8992]

thanks. found the site))

[@Ratkill9000]

Never heard of them. But that could save some a lot of time than trying to make a CAD type drawing for like the CrossFire Pro from Langmuir. Pricing seems to be on par with a CrossFire Pro and looks like it can only cut smaller pieces by comparison.

[@matthewf1979]

@@Ratkill9000 For the small home shop and people that don’t have CAD experience, I don’t think you can find a better setup. You can do CAD still, but that tracing function and the software it uses lets anyone use it right away.

[@la_plata3588]

@@matthewf1979 CAD is pretty easy you can use the software on a phone. the arcdroid is good for small garages but price and how small it is wouldn't be for me. jds garage has a bad ass set up the most expensive part was the plasma cutter his can expand to pipe cutting

[@teemuronkainen]

Doesnt that need some water under that table?

[@ryanwalker388]

I agree with slowing the steering for high speeds. Also, you can align the front with 1 to 2 degrees of toe in which slightly point the front wheels at each other. This will make it want to track straight and not dart around at speed.

[@alvaro_builds]

Toe out worked a lot better on my homemade mini quad, feels more stable. I tried toe in and it was terrifying to steer, it reacted much faster

[@J.D.Shelnutt]

Yea toe in seems like it would be worse, transferring weight to the tire that’s turned in even sharper when it begins to turn vs out. Air pressure may make a diff and just making sure fronts are aligned, the look towed out but may be the lens

[@kitchenbriks3685]

Toe in on the rears and straight ahead on the fronts is what gives you the best high speed tracking.

[@Cracked1ce]

Yeah i think there was too much toe out, you can tell by where the tires are wearing that it is toed out.

[@shaynegadsden]

Yeah toe adjusts its steering the problem is zero caster angle that is what makes you want to go straight

[@darthgbc363]

For the plasma. If you don't like the pierce points in the final parts, than have an approach (lead-in) from the pierce point to the edge of part. Basically, start cutting a 1/4" away from part or inside hole.

[@brianchrusciel7822]

If you want your gas tanks to be more round. Try cutting your material to the proper length to make the diameter tank you are wanting. Roll it a little tight and get it tacked together them without adjusting the roll put it back in the roll and run it around a few times. It will come out almost perfectly round for you. I used to build duct work like this for many years. To figure out how long your piece will need to be decide what diameter you want and add half a material thickness to that and then multiply by pi 3.14.

[@kzarnold3678]

C=2(3.14)r. but most rollers I've used you want extra to get material started. Then cut out the flat spot. I've even put some good tack welds on outside ground them down a bit and ran the part through the rollers like that to work any issues

[@mandrakejake]

@@kzarnold3678 what he said was l = Pi * (2R + 0.5t)

[@leosweeney7955]

He also could have cut perfect circles, instead of tracing to the cylinder and pulled the cylinder to them. At least the ends would have been round.

[@onlygaming69]

I hate math😤

[@brianchrusciel7822]

@@leosweeney7955 he would have had to work the crap out of the metal to get them to fit to perfect circle end caps. The way I used to do it I never had to work it very much to fit caps on the end

[@jaxbigcat2889]

Just when you smoothed things over with your neighbors riding around on your quiet electric bike.

[@Shadow0fd3ath24]

carb sounds like it needs some jetting, it would help a lot i bet considering it has no airbox and a different exhaust setup now....also lengthening the pivot away from the steering shaft that connects to the steering rods will slow down the steering a good bit. did that with my go cart as a kid

[@J.D.Shelnutt]

Lengthening increases throw

[@jetink600]

I wasnt a fan of this thing until you cranked it up then i instantly realized how insane it is. Also I'm getting an arc plasma because of this channel so if any other companies wanna send him free stuff just know the advertising is worth it 😉 lol

[@tejdz1337]

there seems to be something very wrong with the powerband on that CR125 engine. it seems like the powervalve is either siezed or the actuator arm is disconnected not letting the powervalve open. the engine should rev WAY more and make way more power than this

[@funkydunkygaming]

Or he's letting off to early

[@tejdz1337]

@@funkydunkygaming yeah but the way a 2 stroke works itll rev to max rpm even on the tiniest bit of throttle. It seemed very hesitant to get out of the mid range, even sputtering at some points in the video. but i could always be wrong, only judging of how his hand was twisting the throttle. maybe he tried to rev it out off camera and decided it was too dangerous

[@ratherBweldingChris]

I never gave it full throttle when riding it. I’m trying to show what this thing can do while also trying to be respectful to my neighbors

[@colinfuller2271]

Love the "Impaler" on the front !!!!.🤣

[@bigmac..]

Try wide handle bars should help and maybe a dampener too. Toe-in the front little

[@bradleyj.fortner2203]

It's already more stable than I thought it would be. I really was picturing a Hot Wheels car with a bottle-rocket taped to it.

[@kevinsellsit5584]

I think it will be fine with 1/4 inch of toe-in. Right now, it is toed-out and that makes it twitchy because the slightest turn of the bars puts the wheel on the inside of the turn turning sharp and the outside wheel going almost straight (fast turn). Toe in will force the kart straight unless the bars are turned enough for the inside wheel to go past center ... the outside wheel will push until the inside wheel passes center. Much safer on short wheelbase kart. P.S. Love your analogy. Made me picture a Sidewinder missile hose clamped to the side of his kart. Zoom Zoom!

[@ildefonsoraydominguez6252]

How do I test my control module on my HEI distributor

[@kevinsellsit5584]

@@ildefonsoraydominguez6252 There are two terminals which exit the coil on top of the distributor. Use a 12V test light. Connect the clip end to any clean metal surface then touch the pointed end to battery + if it lights you have a good ground. Turn the key to the run position with everything plugged in check for power at the bat + terminal on the coil. it should light. Then test the "tach" side by having someone crank the engine while you hold the light ... it should blink very fast. If not replace module. If yes check for spark at the plugs and replace cap and rotor if necessary. Another common problem is the carbon tip that touches the rotor will fry. Remove coil cover, unbolt coil (key off) and look under the coil. There is a rubber washer and a carbon tip with a tiny spring on it. If the spring is crispy or has no spring left to it replace it. It can be purchased separately, or it comes with a coil and or the cap.

[@jonstorey6414]

Try swapping out the steering for rack and pinion. The steering you have is known for that problem. If you do change to rack and pinion and you find the steering not fast enough. You can buy a box that will quicken the steering

[@rallycrossbuilds]

That's a sweet little bike, would be really cool if u could take some banshee plastics and cut them up to make a mini banshee 😂

[@retired-pipefitter]

Toe both front tires out a hair past straight and it should get rid of the death darting. Awesome man.

[@alaska4229]

Please buy a full face helmet, build is awesome keep up the good work 👍

[@M-oneeleven-M111]

I was about to comment exactly the same thing, especially with build like this where if it goes it's just going to flip. Awesome little quad but I totally agree with you 👍

[@ratherBweldingChris]

I have one but It’s hard to get a good reaction for the camera with a full face helmet

[@alaska4229]

@@ratherBweldingChris safety first!

[@alaska4229]

I just wrecked my 3 wheeler today and if I hadn’t worn my helmet I would not have a lower jaw right now

[@xboxkiller08]

Your tyres look a bit over inflated resulting in you riding the centre of the tyres making twitchy steering. Release some air so they run flat. Good luck and keep it up 👊🏻

[@CrashRacknShoot]

You know when he puts on a jacket and helmet, even he's sketched out by the thing! Lol this little thing is awesome!

[@mrshaneyt43]

Brilliant 😅 I always love to see that big grin when you take your builds out for the first test . Get the twitchy steering sorted out and will be so much fun . Don’t want you going down the road on your face , you got videos to make to keep us all entertained 👍😉

[@nyetcattheronislav2052]

Man you ARE A TRUE LEGEND for all the parts you need to buy RESPECT 💪

[@ptreeau1]

Great job, looking at the tires you might want to let the tyre pressures down, from the video you are running on just the centre of the tyres not the hole width of the tyre. Just a great little machine to have some fun on. Keep up the good work...

[@Dan_Kornfeld]

The ArcDroid is a brilliant piece of kit! Very nice chain guard.

[@joyszillachannel7289]

I love this your project . Simple cute little but very fast and intimidating

[@Rayalas323]

Another straight beast of a machine! Loving the channel and the creativity of your work.

[@jackreacher1963]

Wow thats awesome. My friend had a 4 wheeled vehicle but it was eletric motor and it was neat to ride it around corners it felt like a go cart.

[@morganweast4228]

I agree the plasma cutter will be a game changer. What a nice Man, I've watched 2 or 3 channels where he has given it to them for there use.

[@HiFi5i]

If you start and end the plasma cutter somewhere away from the intended cut line, you won't have those overlarge holes at the start/end points of each cut on the piece like you see at the 10:00 mark.

[@bigtsperspective5831]

The first ride giggle makes me smile every time. Luv the simple builds

[@brandonwyatt3901]

That art plasma cutter is just amazing it's just like art it's way better than cars and cameras this is just amazing everything I love

[@34bartm]

Great build. Love it. Hey bro, you tires are over inflated. Look at the wear pattern. Two stroke 125 usually don't have much torque

[@TWLML420]

It’s been a while since I’ve watched any of your videos you sure have come along way with your fab skills and the tools and gear you have now

[@hemibreath]

You remind me of being a kid, I had a wooden shed I built janky bikes and go carts in. Didn’t have welders just drill and bolts in the 70’s, very small amount of lathe work from metal class in school! Like how you add the detailed of problem solving and silly things like starting that thing on the bench “price less” 👍

[@tinkerne-round4079]

Glad to see you finally got a plasma cutter!

[@fusiondensity3287]

Gas tank would be good in front of the handle bars sideways. Nice build👍

[@nwafab5335]

You're showing out with that arc droid - it looks like the ultimate home and hobby set-up

[@joelmacleod17]

Put pieces of slit garden hose between the tank and mount, sloshing will wear holes through the tank. Nice build, i like the Arcdroid.

[@gubbo_wubbo4906]

Cr 125 engine U might wanna check for warped cluck disks and high jetting? Also like a wheghted flywheel can help with holeshots so yea

[@deathwatch76]

To take the twitchy out of the steering, widen the bars. It's something we do in Mountain Biking for downhill riding to gain stability at speed

[@crazylife6319]

i dont think ive ever seen you with a second set of hands giving you some help n i gotta say, its pretty impressive how you handle that. keep being you dude

[@mxjamy537]

Add more caster to the steering. That clutch was not originally a hydraulic system. Take that hydraulic setup off and just get a cable and perch.

[@johnmorgan1629]

Once you get the steering sorted, would be interesting to see it go down the strip.

[@EngineeredToDesign]

When I built the first steering setup on the power wheels I used one of those go kart steering racks and found they took a bit more turning and weren’t as “touchy” as a push pull setup. Might be worth a try to make it a bit more comfortable to drive..

[@musicauthority5635]

I agree with you right down the line in every point that you pointed out. like wearing the safety gear, it's a better to have a little road rash than to have a lot of road rash. and that the steering ratio is way too quick. you will have to lengthen the pivot points at the spindles. or shorten the pivot point at the the streering shaft or both. and the darting will require a proper toe in adjustment. however due to the extremely short wheelbase the steering is going to be a little bit different then other vehicles. but with the previous adjustments made it should be a lot easier to get used to. when you said it's terrifying that's a good thing. a person sould expect each build to be thrilling to ride.

[@danandyong6653]

Most wheelie bars have shocks in between adjustment zones so when the machine comes up fast there's not a sudden stop at full travel.. that also reduces the chance of rear wheels coming off the ground when full travel is reached. Also, your wheelie bars would need to be longer to use shocks, and reduce solid hits

[@nameless502]

Really sweet build, but it looks like insanity, going that fast on a public street…I know cameras can be misleading, but exactly how fast is it?

[@DetroitMicroSound]

Look the bike up, it came from. They're motocross racing bikes...

[@bren-xmotorsports55]

Bout 75/80 top speed I'd say. Depends on gearing

[@bryduhbikeguy]

Sounded fun...Looks scary as Hell to ride.Glad you lived.I agree with the 'rack and pinion' comments.Good luck.

[@ChaosWolfJoe]

Hello! Love your content so far and saw the steering issue. I think that toe-ing the tires in just a bit more would assist in your steering issue. Depending on the application, like off road, the tires will be toed out (That means the wall facing you is closer, and the furthest part of the tire is wider. Imagine a V with the point being you, and the tires parallel to the V). Or opposite. The reason you toe out is because you want more control and more finnesse in your steering, they tend to stay in a groove better. You toe in the front of the tires for control, as the tires naturally want to find the center of the vehicle and ride it out. I hope this helps, if not this project, then another!

[@redz83]

I just love when you post this videos! Thx m8! Keep up the good work! When you smile during driving I'm also smiling!

[@honeycuttracing]

The Reaper's Roller Skate😁😆, bet your neighbor loves you so much he leaves you flaming bags on your steps🤔🤣

[@honeycuttracing]

Just another SCAMMER!!!

[@bikedoc4145]

''Danger Will Robinson Danger'' Looks a little Darty at high speed 😱

[@pyroboobysmith359]

Too much air pressure in front tires?

[@joshblainer2652]

I really like the tracer on that plasma table

[@uptopswag8446]

That plasma cutter is Badass I want one!

[@trickfkitmakeitwork886]

You need caster on the front wheels. You have the caster facing out words. You need to pull the caster inwards a few degrees. Think of your wheels like a shopping kart they mount the wheels at a tilt to go straight. Caster and camber is what you need.

[@esqueue]

Love your video. I noticed that on your cuts, it is starting on your final piece. I don't know what it is but there is a setting that lets it start on the scrap piece instead of the finish piece. That way, the start points will appear clean, compared to how they came out. Keep up the entertaining videos.

[@kdub0988]

this is DANGEROUS and IRRESPONSIBLE......... i love it!

[@glenwhitacre2754]

Try a steering damper like some motorcycle's have, great video looks like a ton of fun.

[@abdur-rahmanaroyewun339]

His use of bricks are always impressive

[@brianbiro9094]

That thing is HELLACIOUS MAN!!! get the front aligned though 💥💥💥💥💥👊👍👍✌🇺🇸

[@jeffreystorer4966]

Good on you. Mate has Honda Odyssey with zzr 6oo engine but the little quad rocks

[@tracitabor]

I would suggest checking the front end alignment. Also check your front tires and see if they have any odd wear marks. Air pressure can cause your issue also. What an awesome build. Keep up the good work.

[@AFFMotorsport]

Wheel alignment and lower tyre pressure will help, very little contact patch with the current pressures.

[@diogoazevedo684]

"Oh its sketchy", let me just do some full throtle pulls, just to make sure that its sketchy 🤣

[@michaelcouey1383]

How much caster did you build into the front end geometry? Also, you're only using 2" of your front tires (watch the clean lines on the tires while you're riding). That's going to make it wander a LOT as it moves back and forth over the peak of the tire overinflation hump. Notice the backs don't have the strips?

[@leosweeney7955]

Are you saying this because of the width of tire, because a motorcycle, might have an inch or less touching the road? Just curious.

[@michaelcouey1383]

@@leosweeney7955 with that much crown of the tire, when the weight shifts it's grabbing more on one side or the other and will make it twitchy because it wants to pull to the side with more ground contact.

[@AndrewMalkin]

It looks like he might have some toe out as well. It could be the camera lens making it appear that way though.

[@shaynegadsden]

Looking at the box section used for the front there is no caster at all

[@janeblogs324]

There's also no suspension, a go kart uses chassis flex to let both tyres contact the ground. But lack of caster/Ackerman/trail engineering is re tarded. Watching him work is enjoyable but the lack of forethought is cringey

[@BenNawrath]

I can't believe how often I see you ride without glasses lol

[@josealmeida8731]

That plasma cutter solves a lot of essues, specially time essues

[@leosweeney7955]

Make a couple hitch pins for wheelie bar, no wrenches to reposition. Maybe add a steering stabilizer.

[@F5Tornado44]

Dial in a little toe-in. That should help a bit and for a dampening effect, you can get a steering dampener for a VW bug and fab some mounts for it on the frame and the steering shaft. The dampener for a VW bug is pretty cheap compared to a motorcycle or quad steering dampener.

[@DM01710]

Great build!!! keep tinkering and perfecting you will have a right little beast 😃

[@crazydoggentleman7930]

I randomly stumbled on this video and I am so glad, what an awesome project. I’m no engineer but I would widen the steering rack to help stabilise the steering, it might also help distribute the weight better when braking. Maybe look at how the Can-Am Spyder is setup 🤟🏼

[@arnaldofettuccine5227]

Did the same thing on a mini lathe, kinda seen that coming 😲😁 no harm no foul.

[@cockneypatriot9042]

That’s a death trap. Proper widow maker that. Love it. ❤

[@FkCriminalJoe]

If you would get the jetting right on that carb it would run a lot smoother bc it sounds to me like it’s voting down on take off and on the top end

[@pfrmarques]

Love your content and all your work. Rarely come here to comment but please, change that gas tank. Do one of your nice alloy square tanks, it doesn't deserve that. Keep up the great work.

[@petemartus8876]

Nice bike bro! You are good with your hands.God bless 🙌

[@FarmerFpv]

It's been a while since I commented. You seem to be enjoying your builds much more. Keep on trucking, bro.

[@troyhawn6163]

Great content my dude! I could feel the excitement through my phone for sure. Maybe a steering stabilizer would calm it down a bit along with some toe out if it is even possible to adjust 🤔 Edit: I meant to say toe in not out. I get confused on it, but toe in is definitely the way to go

[@mikkel1249]

RATHER BE WELDING , THIS IS MEANT WITH THE BEST OF LUCK AND LOVE . you are one of the greatest builders i watch on youtube but when it comes to driving it seems like you are afraid to get a Little hurt of your monsters - it would great for yourself to get some professionel help to race maybe get some hours on a race track . keep up the great work we love you out here

[@Lucas12v]

In addition to slowing the steering rate, a little more caster on the front end would help it track better. May need to play with the alignment too.

[@drayhoodrc]

Great set up it’s the front tires

[@TheUnholyPosole]

This makes me want to watch Silver Bullet after this.

[@maxsmoove8578]

Put a cable clutch back on it the hydraulic to mechanical ones are extremely unreliable. Great build though that little thing rips. True craftsmanship, love to see it.

[@idolikethisband]

Let some air out of the front tires.. Looks like they only touch the ground on the middle. Looking at the wear pattern.

[@craigkrage2689]

Should have made the tank out of straight angles to match the frame. For the love of God man put heel guards on it. You drop your foot and the rear tires will rip your foot off of your leg. You do amazing work and love your creativity and energy. SuperTalent.

[@johnevon3030]

You need some kind a foot guard/ fender on those rear tires, one slip of the foot will be catastrophic, otherwise very cool..

[@basher_9754]

Proper nacker smasher that tank 😂😂😂

[@notimegarage8632]

This is awesome, just fit a power wheels body around it, give it a look!

[@jameswarren423]

That thing is crazy awesome! Once you get the bugs worked out this thing is gonna be bad ass just be careful because it definitely looks like a death trap !great video and good luck!👍🏼🤩💪🏼

[@acurarl9929]

Great toy looks like it rips good

[@t.mbikeadventures2008]

Ever thought of welding sheets underneath the frame to protect the engine and most other things as it could be a good idea if your ever gonna go off road but such a sick build!

[@davidlyons8278]

You are extremely great at what you do….

[@scottearls7340]

you have the break line ran near the exhaust. When the fluid gets hot it causes expansion and contraction under temp loads and can cause your breaks to fail. And you don’t want that to happen at speeds like this. It could be fatal

[@tinkerne-round4079]

Red beard had a steering multiplier on that yellow Shriners cart they built.

[@hoffmanshaven]

Damn that thing looks terrifying! I want to ride it!

[@fozzy7199]

that thing looks like an absolute death trap, so obv i luv it

[@geoffreyjones2000]

You look like a giant on that machine, sir

[@olivernice8291]

I love it. Fantastic build and great videos

[@kenneth4098]

Sweet little ride

[@heartsky]

Congrats, has a mean but fun look.

[@artofdisguy3401]

Increase the steering arm length on your spindles will slow it down, Also looking at your tires on the front, either they are over inflated or severely under, the contact patch is about 2" wide and not even on both tires, Rear tires need a pressure check as well they are riding centred and not getting full patch.

[@kappa2356]

its amazing and sounds great... but is little lean and with a 2 stroke is normal that it dies when cold in first gear. give a litle throttle after releasing