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

[@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

[@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. :)

[@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

[@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

[@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.

[@carsandstuff365]

That upper chain looks terrifying

[@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

[@allsorts79zander84]

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

[@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.

[@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.

[@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

[@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

[@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!

[@stzf9861]

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

[@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

[@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

[@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

[@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.👍👍

[@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...

[@Krisper401]

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

[@syedalbukhary7545]

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

[@PixellHaven]

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.

[@mateogomez9968]

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

[@notfast_ed4.0]

That’s the coolest pit bike I’ve ever seen! Nice job 👍👍👍

[@geo2cv6tron14]

A little bike with a big engine : cool 👍

[@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

[@RollinMyOwn]

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

[@Authorityoneverything]

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

[@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

[@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

[@gabrielcristiancinematic]

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.

[@hi-kb4cw]

Two words. CHAIN TENSIONER

[@지니-y8y]

18:13 The rear wheel chain connection does not fit the center point of the suspension connection and is installed at the top, so the chain stretches when boarding. The biggest mistake.

[@rickybeaugie668]

The chain doesn't stretch it gets slack.I doubt if roller tensioners would help!

[@amarsiko9601]

Also the steel plate touch the wheel when he bounce or sit on it

[@db7948]

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

[@gazaziho]

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

[@milutinmirovic]

Sta se sve nece uraditi za rodenog brata BRAVO 👍👏👏👏❤❤

[@jackstephen4240]

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

[@pocketrocketschmizza]

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 😬

[@lovejcdc]

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

[@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.😮

[@paolocane8875]

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

[@mr.svenky6780]

svaka cast malo ljudi se ovako trudi ;)

[@soaresringo4049]

Super job 👍😁 bravo 🍾

[@feliperenan6627]

Love your use of protective gear throughout the video!! Messing with bikes is fun, but so is staying safe! Cheers!

[@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.

[@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!

[@stanlyr.v.1016]

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

[@TheKamil2310]

homemade with industrial tools. so swag

[@jamessearle2339]

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

[@MR.N-777]

Good job. PS you look funny on such a small cross👍😂

[@profetarmageddon]

Definitely the best video on this subject!!!

[@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

[@maikonalves6055]

Parabéns Rafa agora os vídeos vão ficar top

[@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" 😱

[@wenepzoli]

Thank you so much for sharing! Congratulations on making a great video, great artwork and a fantastic end result! I wish everyone another successful day and of course strength, health and peace! 👍🍀🇭🇺☝️🌞

[@tothbotond5927]

Köszönjük

[@wenepzoli]

@@tothbotond5927 Nagyon szívesen! További sikeres szép napot kívánok neked, illetve mindenki számára szintén, erőben és egészségben, békében! 👍🍀🇭🇺🌞☝️

[@dannhisbikes8013]

i swear you were running it with choke on

[@RafaelCantarella]

The inclination at which the engine was mounted will cause a serious lubrication failure.

[@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?

[@m.o.b894]

Let we get him 2M be the end of the month😊

[@badsanta3180]

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

[@ivanvlajcevic5528]

Dobro se trudim tako nastavi pratin te od 2019

[@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

[@MongrelOne]

Ok im confused at how the chain stays tight when the suspension compresses this doesn’t seem right to me sorry

[@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

[@reesewawarosky1058]

I think you should have went with a lower chain route, or did you do something about the chain loosing up? It looks like at 18:13 the chain gets very loose when you got on it. Is that loose or am I just seeing things?

[@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.

[@coloncrusador]

Could've just did a big bore kit on the stock motor.

[@Rakyyy]

yeah because we need a child going mach jesus down the road

[@coloncrusador]

@@Rakyyy a whole engine swap for larger displacement to get stock motor power? If you ain't adding power ain't no reason for the whole project.

[@gregoryroberts9405]

Y is it so slow? Should fly.

[@Survival_is_Key]

Aren't you worried about the rear chain getting loose every time you hit a bump? Because of the angle of the chains almost straight up perpendicular with the motion of travel of the swingarm that's why dirt bikes have the motors almost perpendicular with a swing arm so the chain doesn't get loose when you hit bumps if anything gets tighter your setup is going to get Loose as hell and the chains going to pop off spring tensioner on it just a heads up I've been around the block a few times

[@narcissisticnihilist9718]

Bumps my wreak havoc on the tires anyway, lol, man those contraptions were close to shredding tires. defintely need a tensioner/idler arm for that chain

[@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

[@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.

[@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

[@connorwilson8078]

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

[@agushart1]

aduh very good job apik tenan

[@stevantrninic8211]

I am sure little brother will be very happy🎉

[@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

[@j.r.7351]

Svaka cast Majstore

[@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

[@brycel2614]

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

[@robwright3845]

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

[@highlightzilla9581]

Dude the lil 50cc seems just as fast lol

[@Frisky_FZR]

Definitely should’ve thought this through a lot more

[@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

[@404-g6e]

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

[@LegendsReturn]

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

[@conkgord]

excellent as always. ''m going to call you Kimi as you remind me of The Iceman in F1

[@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

[@Никита-е2н1ч]

Go pro kosy 😁

[@reggiexp69]

looks cool save? not sure with those chaines swinging around :)

[@Evilslayer73]

It look awesome young man :)

[@MonahCinema]

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

[@lindalakota38]

Nice sprocket they made looks tough as heck

[@Наталья-п9и2ы]

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

[@Егирьмихей]

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

[@jiasyete]

very cool modification bro

[@austinlockwood961]

Best iv seen in a while

[@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.

[@Nikosakii]

Did all this and left the governor on