Homemade Upgrade 200cc Engine to 50cc Mini Dirt Bike !? (Pocket Bike)

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[@DShomemade]

From now on you can find all the pictures and information about the new Projects on the New Instagram profile: instagram.com/doctor_ds_youtube/

[@igormiloradovic5982]

Ķiikkķj

[@kresovk9730]

Kako se zove novi profil

[@pedjatransport3219]

Druze najjaci si. 👏Podrska i veliki pozdrav iz Srbije.

[@fmajer358]

a db killer mislim nisam siguran jel je il nije

[@edohdabla7066]

C'est bien

[@horstszibulski19]

Suspension travel successfully eliminated... :-D

[@logancurran]

1 pothole and the fork will compress, the front wheel with lock up and you will go flying

[@TGilligbauer]

Lmfao

[@codymaxey8759]

Thought the same thing, as well as the rear wheel hitting the jackshaft bearings

[@zmrkljz]

The point here is not to make the final outcome functional and better. This is followed because it is unusual, well filmed and fun to watch. Most of these projects, once they are finished, go to waste or recycling anyway. :)

[@fahb68]

.... and when the front wheel "come up" on the suspension travel????

[@EnergySeeker]

i think the chain protection need to be much wider to cove 100% of the chain to be safe so no cloth gets stuck and pull the driver

[@harryburford6629]

get that motor level down more,,, cranksharft will be starving for oil .those motors must be LEVELl,, everything then gets its proper lubrication,,. put a chain teninsoner on that chain ,,otherwise great video

[@connorwilson8078]

Bro that’s literally the top speed of the 50cc anywyway 😅

[@alpacino7401]

It's always good to realize an idea If you jump, the rear chain will probably jump too and the chain guard at the front protects you from the chain, but not from the heat from the exhaust

[@Orbacron]

Gonna need a spring loaded chain tensioner on the back sprocket chain when the shocks are compressed

[@benedicto.050]

The rear chain tension is jeopardize by the suspension travel.

[@stzf9861]

Very dangerous transmission, you have to make additional protection over the chain, this one is not enough.

[@roypatterson9910]

I noticed that the end you must have locked the suspension so it can't travel, because if you didn't, the chain would surely have slipped badly!

[@allsorts79zander84]

A little late watching this vid. Nice build but totally disregard the suspension travel front and rear. 😂

[@okayxdumberx]

Only real problem I see is that the engine is mounted at almost a 45 degree angle so the dipper for the oil will be less effective meaning you might get barely any oil going onto the components of then engine

[@abundantharmony]

18:11 The back pully mount is digging into the tire. That's also why you rode so slow. Any faster and the bumps in the ground would wreck you.

[@908__jay6]

Dude deadass forgot to turn the choke off that's why it's not running like it's supposed to these things can easily go 40+mph* with right gearing

[@db7948]

Should have just fixed the 2stroke much cheaper and easier also way safer, that chain looks lethal

[@Krisper401]

There is a governer screw near the throttle lever on engine if you unscrew it youll have much better top speed

[@cdp50359]

To improve more, level your carburetor. The way it sounds, it is flooding out some, or starving for gas. Also be sure your getting adequate oil flow. Your engine isn't level again, this may not allow the oil to be high enough to get splashes inside the crank case. Great build

[@guerosern]

Yup

[@mikeanderson2730]

Cool upgrade, a bit more fun. Only problem i see is the front fork/suspension, it has only 1-2cm travel before the wheel hits the motormount. On a dirtbike the front suspension has a lot of travel, so you should probably take a look at that. Interesting channel.

[@hi-kb4cw]

Two words. CHAIN TENSIONER

[@dannhisbikes8013]

i swear you were running it with choke on

[@AcousticNRG]

Was probably faster with stock motor lol

[@joemama.2031]

lol

[@jonahlitz3402]

This guy says stupid he didn't bypass the governor he's probably getting a quarter of the motors actual RPM range

[@jonahlitz3402]

And here's the best part even if he did get all the power it would flex the shit out of his swing arm cuz he mounted his jackshaft right to the subframe😩

[@tiemenjansma4685]

@Lane AWD lol powerband on a 4 stroke?

[@rayota260]

@@tiemenjansma4685 a powerband exists for every engine, it doesnt matter if its a two stroke or not

[@jackstephen4240]

If the front suspension is compressed it’s going to smack the front motor mount 🤦🏼‍♂️

[@RollinMyOwn]

I'd be worried about shock compression and clearance inherent than that ans a couple chain tensioner it'd be great

[@gamerpreset7858]

that thing is gonna break so quick, engine is facing the wrong way and that your suffocating the poor engine with that tiny pipe

[@Yosser70]

The engine is the right way round, hence the bike going forward ;) You are right though, it will break but because of the catastrophic design of his chain drive! Going from the back sprocket, which is obviously mounted on the swing arm, the chain goes to a fixed jack shaft, thats fixed to the frame. So as soon as you sit on it the stain will go very slack (as seen in the video)

[@hessxpress3016]

also, the backside of the motor is up in the air. All the oil is gonna be up under the piston.

[@badsanta3180]

Вам нужно идти в компанию Лада там всё также делают как вы 😂

[@matthewf1979]

General purpose engines need to be mounted level for the oiling to work. They are splash oiled and will not work in this orientation for very long.

[@Jarda_B]

another disapointing think

[@Frisky_FZR]

Definitely should’ve thought this through a lot more

[@jackmiller4706]

why are people praising this video? (fully understand that its for a child) why did you just leave the motor running on choke? open the choke and that thing would have so much more power, i understand its for a little brother, but running on chokes gonna kill it, you can build a throttle stopper or something to keep him from goin full throttle, it would just need to have a good bit of throw, ive done it myself for my little brothers, or you could also just gear it down a whole bunch throw a bigger sprocket on the rear, and then gear it down even more (if you need to) on the jackshaft

[@rileybeer2836]

Cool but one big bump and the back tyre os going to hit the bearings and the angle of the engine is going to cause an oil problem...but i find it good work because he managed to fit that big engine in that tiny bike

[@geo2cv6tron14]

A little bike with a big engine : cool 👍

[@caroflage6260]

Ummm....whats gonna happen if the front fork....like moves? Plus the engine mounting angle is far from ideal, because of all the oil flooding the cylinder.

[@anthonycordero9271]

And let's talk about the breaks. There not gonna work that well. There not good to stop at high speed. There not rated for 7hp engines 😬

[@highlightzilla9581]

Dude the lil 50cc seems just as fast lol

[@stanlyr.v.1016]

I think the rear wheel is gonna hit the chain connecting mechanism while the shock is doing its thing...

[@shaunhuckabee5904]

Those pull starts and UTTER JUNK! My son has the same bike and I've replaced his 3 times but I've upgraded him to a KTM now! No issues!!!

[@skidhvh]

I'm 14 and i have same little dirt bike, i put bigger carb from 85cc, low resistance filter, 70cc stroker kit, faster engaging clutch springs, sport straight piped exhaust, little battery driven fan to cool it, disc brakes, short throttleand a bit bigger sprocket for high speed, now it wheelies from the start and i managed to go 80kmh on it

[@Authorityoneverything]

That dual chain system was making me nervous, glad to see that you added the guard.

[@handyhippie6548]

i've seen a few cheaply made chinese pit bikes before, but this one takes the cake. bicycle brake calipers, and what looks like a modified bolt on bicycle engine!?! you might want to box in that frame since you have a lot more engine. you may start to get cracking in the frame otherwise from the extra weight and torque stress. edit; i was with you up until your jackshaft placement. you effectively eliminated your rear suspension. it needs to be as close to the swing arm pivot as possible to avoid the chain tension changing with suspension travel. you'll be snapping chains with what you've got here. at least now when it becomes a problem, you'll know why.

[@jamesbaileybailey1672]

I'm taking to work at all fold up the first little bumpy hits yeah let's watch am registering so like a clown he'll get wider than a ball and bulshit I'm calling bulshit

[@mateogomez9968]

20:52 i didn't see the chain protection there! Hahaha, great project. Congrats

[@edmo43]

Thank you friend for sharing your vlog about adapting the 200cc engine to a 50cc minibike. I am concerned about the chain guard. Great job.👍👍

[@sicks6six]

Why did you not buy a big bore kit for the 50cc engine. 90cc that would fly. Still be light and 2T torque. Exceleration. Speed. Everything better that that thing that went in. Plus new kit costs £60.😮

[@gazaziho]

Really it's a perfect work from a qualified person . Just need more protection for chain .. Still dangerous

[@paolocane8875]

I think it was better before, faster and more fun with 2 stroke..😅 but it looks nice anyway.😊

[@user-yg7qn1qd9l]

Как не слитает цепь он звезду приварил к седенью а не к маятнику При сжатия подвески цепь покинет чат

[@budzillasohoski9858]

Dude…I’m at a loss for words. From a guy who builds, invents and creates things I tip my hat to you sir. Making something like this work dependably is no easy task. Well done.

[@walterwhitaker1395]

Say goodbye to the suspension system 😭! All I can say at this point is "JUST BECAUSE YOU CAN DO A THING DOESN'T MEAN YOU SHOULD DO A THING" 😱

[@robwright3845]

Surely the front wheel will catch the engine mount due to suspension travel??

[@jamessearle2339]

Hi have you not just deleted the front and rear suspension by fitting the engine and sprockets that way ?

[@DeathKnight553]

i have to say the time and effort you put into this is nice i love to see it, but you have major clearance issues with the front of the engine mount and the steer wheel, plus the homemade jackshaft to the rear wheel, there is no room for the suspension to compress, and adult rider would go flying off the first time they put it down after riding a wheelie, with a kid it could be manageable, but first pothole or dip offroad would send them flying i would say the effort into this build was really good, but the technical aspect is horrid i mean just look how much that rear end dropped when you hit the gas while riding it. If you really wanted to make this work you would have taken the suspension out, i see trips to the ER and frequent tire changes in the near future with this build

[@NOPPYify]

9:45 ”I’m a genius”

[@Filzkiiz]

YesSiRr!! Mate... you are the Man!! Your doing some Kool stuff... I don't know why my Noti Bell didn't work... but now Iv caught up!! Lol!! Thankz again for sharing some Of your tips and tricks... really appreciate it. Take Care.. Stay Bless... and as always... Stay Safe out there...

[@soylaliux3141]

*You upgraded 50cc to 200cc. Your title is wrong

[@poopty]

It turned to dangerous at 13mins 😂, the exstra drive shaft next to ur knee and the weld this n that out of the way haha

[@jronald262]

Nice! You should put that motor in an old motorcycle. Everyone has some old dirt bike from the 70s that doesn't run. Slap that motor in there.

[@Displacement-destroyer]

Nice concept but both those chains are going to fall off right away😢

[@adrotoscroto6501]

Im guessing you are still learning, but please for next builds take notes from the comment section. There are a lot of mistakes on this build.

[@josephwinters9766]

pretty cool but need to work on that chain sprocket and suspension to hard of a landing will put rear tire rite into that bracket and lock up rear wheel, but I think its cool i would ride it for sure. good job

[@wompstopm123]

i love these, i want to have one in my trunk at all times, i love having something super small that has 8 horse power in it.

[@zoobear02]

And why would you mount the pillow blocks on the frame like that and not the swing arm. When you have any suspension travel, you're just gonna throw a chain

[@TheKamil2310]

homemade with industrial tools. so swag

[@poopty]

He just kept going until it worked 😂💪🏻

[@user-rl5we9bs3y]

газ зацеплен неверно, надо за тягу гарбюратора тянуть, поэтому он и не может раскрутиться, ты тянешь за тягу поддерживающую обороты автоматическую, переделай как надо и поедет

[@aleksandaraleksov2878]

The part he welded to connect the chains, IT'S Literally Touching the Back Tyre WHENEVER the suspension is Moving.

[@aleksandaraleksov2878]

It May still haven't made the Tyre cut a part But, it will happen. A specially the Grаpples.

[@aleksandaraleksov2878]

Buy it was really fun to watch,👍🏼

[@scrapinpennies4365]

Weld the swing arm solid, weld er solid

[@syedalbukhary7545]

9:45 haha just love the fact that you raised your hands up with that expression "no comment". Love your video!!!

[@user-wh7nf5fk5m]

Парень со стальными яйцами 😁 если цепь от двс оборвёт будет аяяй

[@roypatterson9910]

That Jack shaft you made will never work properly, because you mounted it to the frame, but then your chain runs down to your sprocket that has a suspension to, and when you hit a bump, guess what, the suspense is going to lift up and make the chain come loose! Lmao.

[@profetarmageddon]

Definitely the best video on this subject!!!

[@CoralReefkid]

Awesome build, inspired something similar for me too

[@battldogeurmum698]

There are quite a few questionable design choices present in this build

[@drone-dream6583]

if you sit on it the chain is not good or dit you put a tensioner on it?

[@talen_0052]

Does anyone know what kill switch he got? The one with the key

[@brycel2614]

the small exaust is probably making the engine lose power you should make it bigger

[@alexharvey9721]

Very cool, but doesn't the chain fall off as soon as you hit a bump because it's not at the rear wheel pivot?

[@Msmudboy]

no hate love the build but for the motor ad chain stetup did you not think of suspension travel

[@Angry_Django]

I'm pretty sure u could get that motor to run. Air, compression, spark, and gas. It's alot easier to troubleshoot these smaller engines. Nonetheless great job

[@user-uw4sy2im8j]

Руки на месте а вот голова нет....

[@mercuriallimit]

Before i was like, ackkk the upgrade shouldn’t be too hard… and now I’m like, how much? LOL Great video and great upgrade bro!

[@1NIGHTMAREGAMER]

idk if youtube translated title but it says it backwards it's 50cc to 200c it says it the other way around

[@takumifujiwara3223]

I think he misplaced it.

[@kipbreitmeyer8517]

It sounds like it's running with the choke on

[@colbywestendorf5731]

I have a Harbor freight 212 that i put in my mini bike pretty much the same motor and it should go way faster than that. Yours pops and backfires and it shouldn’t do that

[@MonahCinema]

Так подвеска работать не будет не спереди, не сзади. Это просто попытка № 1 и всё. Доробатывай и доробатывай.

[@lovejcdc]

Great job man, I am sure your brother is very happy.

[@gabriel_242-d8z]

This was entertaining but i noticed a couple of flaws: 1. you used the angle grinder to grind the chain to shorten it which could have created a weaker spot on the chain 2.i noticed the chain next to the engine is quite loose 3.The engine is mounted metal on metal, which causes a lot of vibration and noise 4.The exhaust is really close to where the rider's leg would go, he probably won't touch it with his leg but it could create a lot of heat 5.not only the bigger engine, but you also added a lot of weight on the bike with the bearings, the 2 chains and steel parts 6.You removed the foam protection on the handlebars, which are meant to protect the rider in case of a collision with the head from an impact Despite these flaws i enjoyed watching and i still learnt some stuff and it ended up being entertaining.

[@FZ1RIDER]

I would of used a predator 212 but who cares, people underestimate the power u can make with a cheap 4 stroke, for a few hundred dollars u can really spice up those 200cc 4 stroke and it doesn't take a master mechanic to do it, there super easy to break down and rebuild and it makes really good family time with your wife son and or daughter. Great job

[@gordperrin9521]

It seems very heavy..but heavy duty as well!!

[@barky5965]

Svaka čast,ali ja sam uočio jedan mali "problem" sad nisam siguran da je nešto strasno jer naravno ti to bolje znaš od mene jer ti to u stvarnosti vidiš,uglavnom....mislim da ako naškoči na neku rupu sa prednjim krajem da ce nosač od motora malo da začeše po gumi,možda ni nije tako strasno ali eto.

[@lindalakota38]

Nice sprocket they made looks tough as heck

[@CarlosEduardo-kk8cq]

the suspensions will work and the tire will hit the engine support, not to mention the chain swinging, and when the rear suspension works the chain will slack even more, which can cause an accident

[@VidalOP]

hey, which glutch did u buy?? thank you

[@theboogieman401]

That was a dope little build would of got alot more power out of it too . That going to raddle every bolt off lol 🤣 sick !! Swap a ghost engine next

[@tomislavmuzic5068]

10:50 David be like: A U PM!!!!!!!!!!

[@Clunker_garage]

Great vid wish you had the original version to race it !!

[@kelvinyeo9249]

Why are all the new support frame not painted ？

[@american_airlines_flight11]

Just big bore the stock engine💀

[@hozakari5067]

yea im glad u got rid of that sticker

[@dambusse5907]

this inversion is very expensive, and this bike will not dampen? because certain accessories are very close to the tire

[@Calthecool]

The gearing is way too high, try using a rear sprocket with like twice as many teeth on it, and it would accelerate much faster. You could also use two different size sprockets on the jackshaft to reduce the gearing. With an engine that size on that small of a dirt bike, you shouldn’t be able to go full throttle from a standstill without doing a wheelie.

[@jacobg5122]

To be honest, it won't make much of a difference. Those 200cc engines only put out about 7 horsepower at 3600rpms. They're made to last a long time running at a constant rpm under a constant load. Something like a generator or a water pump, which is why they're built with such heavy internals and a huge oil sump. The best you can do is put on a dual clutch style cvt to modify the gear ratio as it revs up, since it's only got about 2800rpm difference between idle and full throttle.

[@archive3do769]

It's a child's motorbike lol

[@miguelcalixtro4939]

Las mínimo no requieren algún tipo de papel para poder rodar? Cómo placas, de circulación, etc?

[@user-cg1ou8qi8b]

I kind of cringed then i saw how close the exhaust and mounts were to the suspension, If you ride it intensely the tires will hit the engine or the mounts