Building my LEGAL stunt 48cc motorized bike! FULL TUTORIAL and ride! 

4:37 *connecting rod. I got flustered

This is the only video on RU-vid that shows this engine on a bmx bike. Thanks for sharing your hobby and your insight. Keep up the great work.

Actually this makes me think of the cool things they would build on the old British TV show Junkyard Wars from the late 1990s. :)

Very impressed with your skill set for a kid of your age.

Clutch goes opposite the throttle.

That’s a creative outcome sir, nice job ! One observation; the chain tensioner should mount to put the tension to the slack side of the chain run. And another viewer comments that the clutch lever should mount on the left grip Now ride it til the steering head breaks off, or until the cops impound it 😃

Great to see young generation using tools to build. Great job!

Btw if your making one of thos make sure you get a good frame cuz mine snapped in half while going 10 kmh

Never cut wire (or a spring) with your tin snips!😱😭creates little grooves or imperfections in the blades and when you need to actually cut metal with them again they will make a jagged and very rough cut, full of little “meat hooks” as we call them. Yuck! Nice video though! Good job!

This is cool, thinking about using a pocket bike engine with a 47-49CC displacement . Cool build. Motorized bikes and Beater Cars are a awesome way to get around

Top notch video. I might do this, but with a 20" lowrider cruiser bike.

That’s sick that you did that on a bmx frame I’m a Moutan bike person I do have a bmx but never would I imagine someone doing that to a bmx definitely really dope

Since this bike is primarily built for wheelies how's the frame holding up? Has it bent anywhere? Worried it will break in half with the top tube cut out. Awesome build man!

Basically a paperboy's company car. :)

Chain tensioner should be holding the lower chain. Doing it that way will create excessive wear on the plastic roller

Great Job! I plan on doing something similar where I put one of these engines in a old razor pocket mod scooter.

I feel like to slightly improve this great design just add some bracing for the frame around the motor to keep the frame from bending on you. :)

Hardware Unboxed coming for you background music😂

If you drill 2 one quarter inch holes in the bottom of that exhaust it helps it breathe and sounds deep and good actually.

Run maxima formula K2 mixed at 32:1 along with ethanol free 91 octane gas and you will never have a failure

Basically a common form of transportation in China, Vietnam, India, Thailand, etc.

You can get a sprocket adapter the mounts it on the hub to the sprocket find them on e-bay

I should have had one of these when I went to college a few years ago and I did not have a car because there was no where to park.

u gave me the idea to buildmy own lol my bmx was only 13 pounds before then added the 80cc/66cc engine kit and ported the cylinder added a reed valve and expansion chanber i hit 55 with it lol but the torque and uphill power is awesome

Seems the engine runs heavily. You could use some oil mixture there, a bit of 2t oil with gas will do.

The motor has to be a certain way. Otherwise fuel/air ratio will not give max results. Engines built a certain way for liquid to travel

you can hear the engine chatter when you don't feather the clutch when going slow/ coasting

That old weird tire rubber thing is called a rag joint.

It is legal to ride when I do not have a driver's license on such a bike when the content is 48cc and how much power and speed it has

Good video there mad fun I have a bunch of bikes on my channel but haven’t tried pegs yet

The idler pulley shld be on the bottom of chain bro.. the "loose" side or NOT the "pulling side"..

Oh my got awesome video 😍

DONT let you're 2 strokes coast, pull in the clutch when you're not on the gas, as the motor will be turning over without any lubrication when you engine break!

You still did do good just make more videos on how you did it my son would definitely be the first one to watch he's still buying everything like you did and he's putting it on a Haro made a couple of mistakes but you still dead good just to get you more views just make sure you fix the things that you messed up in the other video and you got this Bud once it's fully set and done make a video on how you did it and what you did to do it to show people it's not so hard and you'll get a lot more views of people trying to do it good luck and good job bud

When building the motorized BMX do you have to place the fuel tank higher than the bike motor or does it work fine keeping it at the same level? I was just thinking about this to simplify the ascetics of my motorized BMX bike design while keeping it functional.

It is very likely that is a 66cc kit.

Good for you Kiddo great job!

Next, Phantom 85 on a 26 inch BMX.

They make a smaller sprocket for the race bikes, since that's geared for a 26 inch wheel and that's alot smaller I bet it would even out and probably pick up some speed

Do some intake and exhaust mods

Take the bottom of the exhaust off more torque and top speed

Why did you have to bend the frame for this build? Did the exhaust not clear the frame/pedals?

Excellent tutorial.

I bet the frame snapped im welding the bars instead more strength.

I was happy to get a cheaper BMX bike from Walmart for around $88 for this project. Cheaper BMX bikes are really hard to find because of the virus.

Fun build dude,,but your shadow is the one who deserves the likes lol..

Looks like a fun toy to have.

Yeah and your Welds going to break up by your gooseneck or on the bottom watch and see what I tell you because I've done before this tutorial .trust me I've done this on a Matt Hoffman trick bike with double wall rims. I would take pics and show you what it happened about three weeks ago and since then I've done got rid of the bike and got a mongoose grudge that works perfectly for wheelies ...be careful bub where a helmet in case it does snap

Nice Schwinn bmx

smart ass kid. good job bro,just a little fyi. you an get these kits off of wish. sometimes u can find the whole kit for 50 cents! but they sell thes kits on wish all the time. all sizes 48 cc -80 cc. sick video dude.

I was excited until you cut the pipe off the bike and busted out the welder. This is for broke ppl with no welder 😂 Awesome tho 👏🏼

When you cut the top bar off it turns it into an accident waiting to happen. Why do people try to convert the worse bike frame.

Have you ever considered a e-bike conversion kit? Would be more practical, this thing is crazy

Nice video. A little loud for my taste tho. I have a electric bmx. I like a more stealthy ride that you can take anywhere.

Gotta rev it higger atleast i did with mine had that similar little bog like it wants to shut off after lettin out the clutch revit up a little higher n try it or u might be just lettin the clutch out a little to slow ...

Great video well done

Basically the vehicle of choice for a paperboy.

Looks good man

My motorized bike was on a beach cruiser Frame and it got up to 45mph going up hill

Do you think if it was but on a 29 inch bmx you would still need a chain tensioner?

I always think it is cool how even though the BMX bikes are very small a full grown person can still ride on them if they are average height. 🤔🤔🤔🤨🤨🤨

You didn't show us if the piston was in the correct direction... You know the pins in the ring grooves go towards the intake side... right?

Put a stereo system on it too

that's sick but damn are those engine burns on your leg? Those are some savage battle scars :O, maybe it needs a heat shield as well. Totally epic video though thanks for doing this.

I've got tuff rims on my bmx, i'l see how they'll do with the sprocket

Have you tried trail riding on this pretty cool BMX bike?

I got that same engine kit...I just need tools

lol, motorized bike people don't really care about making "legal" bikes, it kinda takes all of the fun out of it. Anyways other than a few mistakes like incorrect chain tensioner positioning, and not using a 2 stroke gasoline/oil mix (24-1 or 32-1for break in) you had a nifty idea putting it on a bmx.

BIG BORE KIT AND IT WILL BE FIRE BRO

U should seriously make sure the lil c clips that holds the wrist pin in is completely seated. That’s the biggest failure for these engines, they vibrate out very easily

I got a lot of parts to build me one just like this where u get the bike stand

I don’t know if you’ll see this but I have a problem with putting on the chain it hits my frame since it’s too close to the sprocket any suggestions on what I should do?

When mine was stock it went 35 mph that one should too

Looks like you have done this before!

Im 15 but i will buy that

so at 4mins did you say you had to find the adaptor plate?or was it in the box?

you have to put a 35 tooth plate with this one it will not go fast

Обкатку проходить не надо. Осталось только схватить тепловой прихват когда будешь катать его руками

Cool

I got a question ..the kit I got..there is no head..it's all one piece..ever seen one like this..does it work. I'm building now

Seems dope homeboy

Do you think a motor will fit a 2015 kink launch?

The 2 stroke kits are loud make more power need more work and have a clutch but are much cheaper the 4 stroke kits are much more expensive quieter but make less power

Most people install the chain tensioner to lift the bottom,, return part of the chain. How is yours working out for the long haul?

🐐 🐐

I have a couple motorized bikes which are 26 and a double seat but I got to try this with a 20-in and did you have pegs on yours?

Yep I just got the century fc 90 also

Hey dude my bmx looks like it wont have space to put this and I want to put one of these beasts on it but instead a 80cc do you think it will fit ??

good ish my guy u think i can put pegs on a alpinestars MtB its a retro with the str8 handle bars

Noice

Where do you find cheaper used BMX for building a motorized BMX bike because new BMX bikes are expensive?

En qué parte de USA lo mandastes a comprar yo quiero uno como hago dime y seguiré los pasos.

wish i could do this but i have no clue where my dad put my bmx

Well? Has it. Blown up yet?

i really wannna put one on a slack dirt jump MTB frame do you think it would fit without cutting the frame?

yo its ben a few years and just curious if the frame ever broke

That’s a 80cc cause size of intake

Hey can you tell me if I can fix the sound because it's too loud

Would you need a drivers license to use one of these

Mine don't stay on idle when I squeeze the clutch it shuts right off?