MotoVox minibike gets a 250cc dirt bike engine!

[@josephrockey2000]

Holy freakin’ deathtrap, Batman! I love it! You are the Mini bike Whisperer. Another greatly interesting and informative vid, Dr Black!

[@Black66]

Thanks!

[@eyehearther111]

The way you did the exhaust and intake is smart 👌 she's a beauty

[@rogermcdonald1607]

David your ingenuity is unbelievable! That thing should be a rocket ship! I wouldn't want my grandson on that machine. Those small tires are killing your top end. Very cool sir!! ✌😎🇺🇸

[@heavyd5670]

Props to you man on this build, I mean this thing is freaking sweet. It really does look like a mini motorcycle. hope you have lots of fun on this bike!

[@jamesgravel7755]

This is the video I’ve been waiting for. Nice

[@hobbyhobby951]

Awesome video man. I love when you try new things like this!

[@Rebel-Neck]

Badass! I look forward to seeing you do some testing with this bike! I very much enjoyed your ghost engine series!

[@thirdgenmacgyver2626]

I would still try a bigger carb , definitely need smaller rear sprocket, and the idle sounds little fast for that type of engine to me. Freaking love it and have wanted to build one like that for about 3 years now

[@honeybadgeractual5734]

Surely you meant a larger front sprocket, or a smaller rear sprocket to achieve a longer ratio instead of a taller ratio on the final drive. He likely has a 12T or a 14T tops out front, and a 60T rear, he needs the 45T rear and a 17T front.

[@timothyprice9064]

@@honeybadgeractual5734 I'm thinking, he could do it all with just the rear sprocket.

[@fhloating]

@@honeybadgeractual5734he said smaller rear sprocket?

[@JimCooper-f8g]

Taller ratio means lower numerically

[@austinallen4470]

This set up is almost exactly what I've been looking for. I want this engine and transmission in a mini jeep!

[@CK-mf6du]

I like your custom intake lol. Good job!

[@lesheath6216]

Well this pretty much answered most of my questions about how to install a chinese 125 onto my Murry Trac2. I'll definitely be using the 12" wheels and tires

[@dmann1209]

B66, you are the man! Awesome bike!

[@Black66]

Thanks!!

[@dxcenataker]

I was gonna do this exact build 2 weeks before this vid dropped

[@andrewkuhtz]

Great idea with the intake manifold! Bike turned out sweet. Ya big gearing change it should fly…

[@ryandunn5362]

I don't know anything about tiny motorcycles, but this was interesting and well filmed. Great job!

[@Black66]

Thanks!

[@AverageCitizen333]

Cant wait to see this with better gearing and a real pull down the strip. Subbed

[@Black66]

New video coming soon!

[@ilkoderez601]

This channel is awesome! ONLY MINI BIKES! (or mostly)

[@michaelcarson8534]

Just now thinking of this? Been there and done that, only using a bicycle frame, forks, and the rear rim reinforced with Harley Davidson twisted spokes, and the front redone the same way. Belt drive and a v twin motor. Your mini is really cool! Really cool!

[@Black66]

Yes, also did a bike on the channel. Check out the 400 or so videos on the channel with many different bikes and set ups. Thanks for watching!

[@michaelcarson8534]

@Black66 i like your channel and the workmanship plus pride you put into each build.

[@jesses1589]

Really great job on the build! The one thing is, you're going to have to pull the motor to do a valve adjustment.

[@j.finesseflights1403]

Gr8 edit and nice craftsmanship!!

[@eyehearther111]

Omg yes!!! Gears!!! I wanna ride it!!! That bike is sick!!! Good job. Think this would be one of my favorite builds you've done so far. Let's race. 😂

[@Black66]

Yeah it is cool with the gears !

[@QuangNguyen20]

That generic gy6 harness may need brake lights & brake switch in order for the start solenoid to work. Close the circuit at the brake light & brake switch if you don’t plan on adding them 12v ignition -> brake switch -> brake light -> start button -> starter relay/solenoid.

[@matthewf1979]

Every sharp bend in a tube is an effect decrease in diameter. Straightening out the intake/exhaust will give you more power and require larger jetting.

[@amandarego9684]

Cool video! I've been thinking about buying one of those engines and fitting it to a mini bike. You can buy them for a little over $300. That's probably less than what I have in any clone engine I have

[@drchan5893]

great video sir, I put a CB250 into a pit bike and it go's like a rocket, it's bloody dangerous being so small and having so much power no matter what gear your in it will try and throw you off. you can lower the motor and tilt it back it still works.

[@scu-dub]

Original owners want to buy it back now😂....just too good with these bikes man👍🏻

[@jamesgravel7755]

That thing came out sweet. I absolutely love the intake idea. Just flawless and the pipe? Just beautiful. I’ve been thinking about getting one of these engines. For 300$ that’s not bad at all. I bet a tillotson carb or a clone carb off a stihl 090 chainsaw would be a good substitute for your set up

[@SUPRAMIKE18]

Can find some decent knockoff Mikunis if you search hard enough.

[@DRIZZYS8U]

I would love to see the cheapest mini bike build you could do. I love the videos man

[@jamescolton1051]

Love the inspiration Something to think about. I can see a 80 two-stroke on one

[@RainbowSheep_was_taken]

Im making a universal 4 speed transmission for mini bikes and gokarts. im currently trying to find the optimal gearing for the predator 212 then ill keep makin designs till i can make one that is perfect then i will make prototypes.

[@kylen4791]

still working on this?

[@RainbowSheep_was_taken]

@@kylen4791 yea bro im still designing. I am hoping to get it done like in a few months but the only problem is money. i need money to cast it, a lot of money, i cant cast at home but im planning to make 1 prototype at home for testing and marketing. Production will be in china and assembled in my home cuz its cheaper but the problem is chinese companies for casting have insanely high minimum order quantity, 100pcs or more, and lnly the mold costs 5000 usd. The quoted me 10k for 100pcs but im tryna find a cheaper option. Ill figure it out tho dont worry, im making tachometers for mini bikes, im hoping to sell them and make money for the gearbox.

[@thegreatkrimpus6139]

@@RainbowSheep_was_takenhave you tired crowd funding or trying to get the casting done somewhere else ?

[@RainbowSheep_was_taken]

@thegreatkrimpus6139 i havent tried crowdfunding yet, because i dont have everything fully designed yet, i am almost done i just need to do finishing touches on the clutch area. im going to cast 1 prototype at home or let some do it for a very expensive price for testing and marketing or whatever. then ill try crowdfunding or maybe sell the files to someone. money is the biggest limiting factor here

[@lijlij1973]

@RainbowSheep_was_takenchecking up on this we need this to be added to the minibike market

[@andrewwolvin964]

I met him in the parking lot of my work he’s a great guy

[@MidTownMinisRashad]

That was my buddies George’s old bike, glad you could finish it up that’s an awesome build

[@justincuellar3101]

Just throwing this out here, been watching your channel for years now and the information from your builds helps us a lot. If you want to dial in maximum rpm and temps from carb tuning, try using a run leader tach and temp gauge to get the most out of the builds. I noticed that whenever my bike was too lean or too rich it wouldn’t hit its max rpm and didnt get the head up to temp

[@justincuellar3101]

From a filter change to a velocity stack on my vm22, I lost 500 rpm alone and my motor was hiccuping, went from 54mph to 48 on my hisun 196, stock bottom end, stock springs with aluminum push rods, and a super 30 tq on a 40t. Bike definitely has more in it and was asking for more fuel

[@justincuellar3101]

Good information for us stock rod guys, 6500 is our redline and with a tach we could do a mild budget build accordingly, stock springs keep me limited to 5500 and the pushrods should get me close to 6k, makes me want to run a very cheap mild cam just to get the right power band from 4-6, kinda neat running a torque converter cus the motor doesn’t want to rev itself to the sky from the parasitic load

[@BustedKnucklesBuildsTexas]

Killer video , cool bike !!

[@UncleChUck33]

Wow so it iz possible electric start too 💪🏼💯💨💨💨💨 woohoo

[@medacolden9458]

Sweet, now lets race my dirtbike with it! 👍😃

[@greggory448]

Definitely a quad motor with reverse. I know hondas are between 14 and 17 Horsepower. At a 250. CC.

[@jjhack3r]

Honda Xr250 is 22 horsepower and that bike isn't a race bike whatsoever

[@jesses1589]

That motor is a CG250(230) CC china engine. 5 speed, about 15 HP

[@BetterAnthonySpano]

This is a super cool video man. I love it

[@crybabylocr4012]

I love all your projects

[@NVScrapper]

Wow that was a really cool video...LOL the shifter fell off...🤣🤣🤣 You are an awesome mechanic Black. Can I please have your autograph 🤩

[@Black66]

Thanks! Yes, but it will cost you...😃

[@BetterAnthonySpano]

I know he didn’t mean it funny when he said it. But when he said “I can use 4th gear as 1st” I laughed

[@krisley5178]

Cool experiment. I'm surprised it didn't look like it was trying to pull the front wheel up at all.

[@Black66]

I have another video on this bike with different gearing. kzbin.info/www/bejne/aF7Io2uafbx2jMk

[@timbattle3415]

You have it backwards, all the other minis need shifters!

[@jjhack3r]

The gears are probably too close together for him. He should just get a smaller rear sprocket.

[@theLyzhendricks]

Agreed ​@@jjhack3r

[@BetterAnthonySpano]

I was waiting for it

[@robertmichael8036]

Awesome 😎👍 man little beast

[@guerosern]

Bad ass brother 🫡🫡🫡🫡

[@teshuvahemmet3036]

Nice job 👍

[@domturiace670]

yes finally not a predator . I dig it

[@Celternix]

I feel like the carb needed to be facing higher so the fuel can flow down but it seems to be running alright. Good job 👍

[@musicaquellegaaalma-cc6kq]

you is good mechanic for creation speed mini bike thank for your videos is very nice

[@z1berzerker]

Nice 👌 thinking on this build 😎

[@jaylingreen8977]

This motor normally is paired with a 35t sproket and a 18in wheel with phat knobby tires You are in tractor mode. Please give this engine a fair shot and make a follow-up video/part2 with proper gearing and jetting. There's not enough info out on these 5 speed clones and we the people would really appreciate it. Keep up the great work as always🫡🫡🫡

[@Black66]

Thanks! The updated gear ratio video has been out for a while now, check out the playlist on the channel kzbin.info/www/bejne/aF7Io2uafbx2jMk

[@francorocha8014]

Just to think a 16 years old built it . His name is George. I told him he was crazy lol

[@TruthANDTurf]

Hi, hope your fealing great, if you dont mind me asking, how do you get a 208cc dirt bike frame, i cant find anything. Please and thank you:D

[@faxbest1336]

Love the build but you should repaint the frame so it looks nicer!

[@SpACeCruizeR2o3]

That thing man wheww i tell ya 💪🏼💯💨💨

[@johnk6346]

Wow custom bikes 🤠

[@Deborah42077]

He'll ya look at you brother that's bad ass ❤

[@tjgames1964]

I happy to see this video on my birthday

[@Black66]

Happy birthday!

[@tjgames1964]

Thank you, sice, I got my mini bike. i just have been watching you for tips i love all your videos and i am in arizona to ​@Black66

[@MrJjhemi]

Great job

[@sdcanyoncarver2203]

Come on buddy, you need to put a KX500 or a CR500 engine in that mini bike!!! That would be RAD!

[@crownedgorrilla]

Royal jz just did one like this...super kool

[@OGbqze]

I've been thinking about putting one of these engines on a 1970 Triumph motorcycle. Do you think it would be a viable option to cruise around 50mph?

[@ogbigtsbikesandstuff887]

Neat project 👌

[@DustySteel]

Your brake bleeding technique is awesome!! Does that 250 have a big bore kit on it yet? If not, that’d be an awesome video. I’m about ready to install a 222cc kit on my Honda XR150L.

[@Black66]

Thanks! No big bore kit yet.

[@DustySteel]

@@Black66 I actually just installed mine. It’s a lot faster now!!

[@zxrotation8111]

Hey black I just got a lil rascal from gps! U should do a video on that frame next for sure

[@AveryCastro-qs2df]

Thank you so much you help me build my bike

[@Scott-ow3tz]

That's sick I always thought about this

[@Flavorsonlyyy]

Please build this up I’ve been wanting to see someone do this for quite a while , imagine and 65-85cc 2stroke engine. Man it would haul but lol

[@jasonmcwilliams143]

That’s bad ass bro

[@Black66]

Thanks!

[@phoenixarizona8441]

Baja warrior with a 250 dirt bike engine and street legal kit would be sweet

[@Scott-ow3tz]

Go 17 tooth on the countershaft sproket. It will make first and second at least useable

[@Black66]

Gearing video coming soon!

[@stevenervin4113]

Cg250 if it's a pwk30 run a 38 pilot 120 main. Air screw out 1.5-2 turns

[@Black66]

I live at 3700 foot elevation. My jetting will most likely be different than yours.

[@Austin-qq7kt]

That’s fckin sick!

[@mini_rocky5189]

Where did you get the front wheel IS AMAZING

[@Phillip.G.Lucion81]

What kind of mig machine are you running dude waht a way to have a summer great builds

[@Black66]

Thanks!

[@stevenpleasant5834]

Hi, I really like this build you did where did you get the motor mounting plate from or did I miss you building it I will go back and see if I can find it but if not how did you do it thanks.

[@EmZyAnarchy]

Anychance you could tell me which wiring harness and electrical stuff you got i got the same engine and i have to swap the wiring out

[@Black66]

The links for the parts used are in the description of the video.

[@thomasedwards9024]

you should definitely check out my 250cc coleman ct200ex!!

[@JasPlun]

I want to see you put a Kawasaki V twin FR 691v engine on a mini bike! Probably stick out the sides too much, but I still want to see it done by somebody.

[@joshuamcleroy1594]

How do you get your speedometer synced with your videos?

[@Black66]

I use the camera software along with a Dragy performance meter for 0 to 30 times.I also use digiHUD app on the phone for top speed .

[@Zachhhansen]

Do I need to oil my clutch and chain after every time I ride it? If not how often should I?

[@anthonyh.1512]

What size is the tire that was mounted to the bike originally? I have the same 8 inch wheels and I’m looking to fill the space with a larger tire just like that. If you could tell me the size that would be a huge help. Thanks!!!

[@BetterAnthonySpano]

Did you get that sponge bob idea from my video ?👀👀👀👀

[@stevenpleasant5834]

Hi, where did you buy the motor kit from? thanks.

[@Black66]

It was on the bike when I got it but you can pick them up on Amazon.

[@ameerisaacs9529]

sick build !! is that a 38mm exhaust ?

[@Black66]

Thanks! Check out the build video for the exhaust. kzbin.info/www/bejne/h33HhJhtqq57q9k

[@frofrobikelife2516]

Now that how you called a mini bike

[@hattratt1458]

How good is that engine I've got A. Chinese. Kasea Skyhawk 150 And I'm thinking about getting a 250 for It was looking on Amazon and saw that motor.

[@spencerhigdon1428]

Did you make the mounting tabs your self or can you buy them some where

[@albertmichall5732]

I love it.

[@dobermanpinscher11]

cool cool mini--what engine is that with a reverse ?

[@AaronParker-x6d]

fireeee!!!!!!!

[@SergioM.69]

🔥🔥

[@818adventures]

Do you charge for maintenance?? I need internal check ups as my bike is acting strange and I have not as much knowledge as you .

[@Black66]

Thanks! I only do this stuff for video content.

[@JosephCox-l1g]

Where did you get the wiring harness

[@Black66]

Links for the parts used are in the description of the video.

[@jonathansaldana8042]

Dude, i picked up one of these motors as a project, and the wiring is absolutely killing me. cannot figure out how to get spark.

[@Black66]

Maybe the stator or the rectifier/relay is bad...maybe

[@romanleonard2154]

Stock 301 please.

[@livinlikelarry8782]

Bravo🎉🎉🎉🎉

[@scarpinoja]

What kind of tires are you running? And which do you recommend for road use?

[@CurtisNorth-vs8pr]

Hey im thinking about putting a 420cc, 15hp, off of Amazon onto my Coleman CT200u EX and straight chaining it and getting a performance carburator. Could you do a video on doing that?

[@Black66]

Yes at some point I will do some big block content.