Big Bore Kit Installation Instructions - 49cc Pocket Bike Engine PS50 from Nitro Motors

[@MiniBikesStore]

SHOP HERE 👇👇👇 🚚 Delivery to 32 EU Countries minibikes.store/

[@workshop.wizardry]

Dont tighten the sparkplug so damn hard pls

[@nilsh.3285]

You have to rotate the cylinder gasket so the cutouts for the ports line up.

[@Tommysmess]

What I was thinking to lmao

[@michlsimon9883]

Is the bearing in the piston or ist the beraing out of the piston?

[@drplasmodius]

Tighten cylinder bolts in a star pattern.

[@CMBProjects]

So cool! I made a RC car with one of those engines!

[@sjemmiesjem]

not so sure about your assembly skills, or it be a good example of how to... - place cilinder gasket on cilinder to line up with ports - NEVER hit on cilinder/ or alu parts to make them fit - tighten bolts in star or diagonally across pattern - check NM torque specs especially with aluminum cilinder/cilinderhead when tighten bolts - don't overtighten spark plug

[@ProfileP246]

Was thinking about installing one of these, will it improve low end grunt for hills? good video!

[@Bigwhitechadd]

Lower tooth sprocket will give more torque

[@chrisclarke1965]

Cool project. On ebay they already sell pre-made race 49cc 2 strokes with the big boar kits already installed. 160$ tho

[@phillbooth2331]

Is this using the standard crank?

[@ilicicdarijan2018]

I installed this same big bore kit on my pocket mini cross and add 15mm carb and i have about 65kg and when is warmed up after 5-10min of ridding when i stop, it won't turn of motor on switch and in place work on high revs... I dont know whats the problem, and the same was with stock carb and when i added 15mm carb i think it goes weaker...

[@MiniBikesStore]

Hi, can you turn off engine by key when engine is cold? can you start engine when key is off? if yes then you have problem with wires, ground is missing somehere, if not the it looks like engine is self-igniting. this happens when is high compression in the engine and high temperature, you may need to reduce the temperature. make sure you have good oil and you mix it 25:1 for each 1 liter of petrol you need to add 40ml of 2 stroke oil. you may need to also regulate ratio fuel -air give more fuel less air. this should solve the problem

[@Unknown-mr2es]

​@@MiniBikesStore 40ml/1L?? hell nah you need 1:50 so thats 20ml/L for these small 2stroke engines. if you use 40ml/L you will get oil fouled sparkplug and you will smoke out the whole neighbourhood.

[@realestreaIist]

​@@Unknown-mr2es I know this is from years ago, but these engines are rated for 25:1. Not like chainsaws or weed eaters that use 40:1 or 50:1.

[@samsgarage1716]

Great video.I make go karts for my kids with those 49cc engines.I love to work on them.You have a great channel.

[@MiniBikesStore]

thanks for feedback

[@vatanozdemir4775]

Bro you put the zylinder gaskit wrong

[@ukaszmadro5624]

Cześć, jaka jest różnica pomiędzy setem który założyłeś a np cylindrem moretti dedykowanym do tego silnika ?

[@PancakePigeon]

Do they make a CVT for this engine?

[@skrotis9737]

what cc does it get from bigbore kit?

[@tran-zam]

the believe the stock bore is 39mm which equates to 49cc and the big bore kit is 44mm which equates to 63cc although it might be marketed as 80cc just type in 49cc 44mm big bore kit

[@ohio203]

@@tran-zam u sure idk bcs my engine is stock but has 44m piston and head and stock head

[@avalanche15301]

@@ohio203 39cc from my measurements, has a bore of 40mm I believe. The 44mm piston bring it to 49cc. If your looking for good power gains do some carb tuning or upgrade from 14mm to a 15 or 16mm carb then tune. You can also advance timing for bottom end grunt or retard timing for top end power and speed. You could also do a port match and port polish. If your really into making power, you could mod a carb to run nitro methane also (rc fuel).

[@panaplexi5708]

Does the kit help a lot or not in terms of performance

[@MiniBikesStore]

It does increase power to aprox 5hp

[@tiitus4179]

Does i need new crankshaft If i buy this

[@honda3189]

Hej wiesz może z jaką siłą dokręcić te 4 szpilki od cilindra . Mam klucze dynamometryczne i chciał bym to zrobić porządnie.

[@d0mixxd632]

Możesz normalnie dokręcać ręcznie na wyczucie tylko pamiętać by przykręcać na krzyż i będzie porządnie A wiesz może jaką świeca się tam znajduje Bo nie mogę kupić ani nigdzie znaleźć a jest tam niestandardowy gwint w dodatku nie wiem jaką długą kupić świece

[@martybrowning6702]

What about the carb? Bigger piston means more air, more air means more gas!! Seams to me that if you want full potential of this kit need to find a bigger carb or jet it yourself! I have a big bore kit ordered, just got the new motor in, but... going to look into the whole carb thing!

[@datboibottemtext]

you wanna hear a funny joke it is still 49cc

[@NIS_ONE]

@@datboibottemtext then what's the difference?

[@forgeforreal9674]

Can the original crank hold together with that cylinder?

[@charliessonynetwork3439]

Yeah some guy made a yz 75cc piston and barrel fit on the original crank and bottom end. And it ran.

[@fmfinlay9602]

Very calming video

[@tyladube801]

Yea till you're actually working on the engine yourself😂😂😂 that's when things can get aggravating from there

[@happyjuppi]

Brak istotnych informacji na temat tego kitu..o ile zwieksza moc, jaka byla srednica tloka oryginalnego i aftermarketowego, czyli z 49cc ile będzie pp zainstalowaniu kita? Pozdro

[@panbobr5411]

65cc 44mm kit seryjny ma 40mm wiem ze pisze po 4 latach xD

[@mangilitheinz3765]

Is there a big mini moto thats have front absorbers?

[@MiniBikesStore]

check our hobbit sport

[@lorunner1213]

Where do you find performance parts for this engine?

[@SuperSodamachine]

ali express

[@JcGrande7]

Where did you get your exhaust?

[@musicmarketersbotswana2300]

never stop winningggg

[@adam_-adam]

is there a noticable difference in power?

[@MiniBikesStore]

aprox 1-1.5hp

[@yousifkakoz5593]

What kind of exhaust is that

[@MiniBikesStore]

standard pocket bike exchaust

[@speedokoterefinishnetwork4937]

Very good video

[@MiniBikesStore]

Thanks

[@Chmelnica]

badly rotated seal under the cylinder. The cutouts on the seal are for overflow channels. I do not understand the meaning of grooves (windows) in the piston. What is it used for? What are they opening?

[@SandyLambo-ee8qb]

Boss saan pwedy makabili yan

[@joshchatwin1517]

The piston bearing and rod don't fit my stock crank I don't get this how are people making it work the old smaller ones fit but are way to sloppy

[@gfriedman99]

Does big bore kit require resetting the carb?

[@MiniBikesStore]

no, you do not need to reset the carb settings

[@martybrowning6702]

Don't adjust the fuel to air ratio unless you need to!! It's one screw that does both! You add more fuel, you cut out the air! Factory carb is fine.... however... I build a lot of race cars, bigger piston mean you can get more air and more fuel! I'll be making a video of how to jet one these little carbs! Makes a huge difference!!! And it's a very very small rejet!! Looks almost the same, That's because factory piston is 40mm this is 44mm very very small!! Wish someone would come out with a true big bore!! Like a 50mm!! Build carb, little bigger exhaust exit....have something then!! I may machine one someday and see what I can do with it!! Sounds like a challenge!! Yep..

[@christopheroneill2961]

@@martybrowning6702 what oil fuel ratio?

[@NIS_ONE]

@@martybrowning6702 you ever machine anything

[@camwhite9036]

How much does this increase the speed

[@charliessonynetwork3439]

It takes it from probably around 3hp to 5 MABYE at a push

[@arjedferrer2402]

Hey I'm joshua can you please do a full assembly at tinker motors DMX 49cc

[@MiniBikesStore]

Hi Joshua please click on the link, this is the same bike just different name, full assembly instructions, I hope it will help. Bart kzbin.info/www/bejne/aXTYqWuhrNZmnrM

[@Gamen4Bros]

Can you sponsor me a rear sprocket for a video?

[@bubatzpirat396]

They are 7Dollars

[@denniskachale6307]

hello? liked the video, can i fit a big bore kit on a Chinese lifo motorcycle?

[@martybrowning6702]

Have you tried it yet? Not I'll be installing one on my son's for Christmas...That's one thing he wants...but I will let you know

[@sophiemamiya1740]

What should I do If my pocket bike doesn’t give electricity to the spark plug

[@MiniBikesStore]

check our videos "pocket bike not starting" it will be problem with one of the switches, cable, or coil

[@gameexe6337]

so i bought one of these (actually, 3 of these) and upgraded one of my bikes with it and this kit has one huge flaw, the top part is separate from the cylinder, being held down by 4 very long bolts, metal expands from heat and the bolts lengthen and the cylinder starts loosing compression and the engine dies till it all cools off and returns back to original shapes, than the bolts will be loose and have to be tightened again, than it will start again, but same thing will happen again,after several times of this happening the cylinder becomes a few micrometers shorter and the piston starts hitting the spark plug and bending the sparky bit inwards and making it touch the other sparky bit and not making any more spark, gotta add a second ring between the spark plug and the head to pull it in a little, huge headache to get it to a state where its functioning properly

[@jasonchitwood7436]

That's why you use stud's and lock nuts just like the Japanese bike's.

[@mati-_-5149]

what it gives?

[@jesusfigueroa3370]

What size is the spark plug?

[@gfriedman99]

CJ8

[@segaloado7231]

great vidio

[@robertalcorn7332]

I though piston arrow went up?

[@bigeroberson]

49cc is the big bore. The cylinder you put on yours just looks cooler and the ports are a little different

[@drunksanta1427]

same stroke, bigger bore, more CC

[@vaclavfiala3947]

so this kit increases cc right ?

[@MiniBikesStore]

right and compression

[@martybrowning6702]

Like I have been telling everyone... For full potential of this kit...carb work needs to be done! Bigger piston, more air and more fuel you can get!!

[@qldminimoto47]

no it does not improve cc's.. cc's = bore size & stroke, its a 44mm size bore, same as stock & the crank is the same, so cc's cannot be increased with just the same size barrel. the only difference is this headkit has boost ports. Come on, how do people not know this??

[@derkommentarschreiber3603]

It doesnt matter if you replace the crank only if you go up to lets say 75cc thats where it‘s not efficiant to run a stock length crank

[@jaicegomes2881]

He didn’t tighten the bolts in a crisscross pattern 😭😭😭

[@BLACKRAIN390]

How much faster will it go

[@MiniBikesStore]

not much faster but it will be stronger

[@MiniBikesStore]

Please SUBSCRIBE to get latest videos about Mini Bikes kzbin.info/door/jmGnctv7sAks8Dx4cNB4hQ

[@Ace01010]

where can i buy this and can u do a speed test or can u tell me what kinda speed do u get

[@josephtaverna1287]

Yes mini bike store I like to see the finished project and see how fast that red bike will go because I might be interested and buying one of those Motors fitting it on a Schwinn Orange Krate

[@bongarcon8806]

Put cooling water Diy in Ali

[@satriovilando7399]

Beli mesinnya di mana kk

[@rocket7314]

hello, I have such a question because he stood by the winter in the basement and in yesterday if I wanted to fire him, he did not want to help me?

[@moped1011]

Vidéo excellente

[@MiniBikesStore]

thank you

[@dregsta]

Just by the accent I know your Polish. Pozdrawiam!

[@diegoarthurnascimento]

Haa corda fica pesada na hora de puxar é normal

[@fistofthenorthstar9010]

How many hp?

[@MiniBikesStore]

aprox 5hp

[@eddiedodson5879]

Mini motto remove ignition barrel

[@sebastiankowalski6844]

kurwa jak piszesz tytuł po polsku to speak też po polsku XD

[@trzcina0147]

ty chyba nie wiesz ze tytuł przetłumaczyło ci z angielskiego na polski xD

[@danbass4049]

I boat a big boar kit it is the same as the one in the bike stock don’t let this scam you just a couple different shapes in piston please don’t let it happen to you

[@tyladube801]

But do you realize that s different piston gives you a power and performance boost cause it's called a ported piston and piston head it's has better porting than the stock cylinder head and the stock piston has no porting on it

[@hiddeland8244]

you forgot to put oil on piston and cilinder iguess

[@MiniBikesStore]

I did put oil before installing the piston

[@That1E_K1129]

Bro put no oil on the skirts of that piston around the rings. before slipping it into the jug🤦

[@defenetlynotthelizardlord8425]

why dont you upgrade it to 70 to 80 ccm

[@MiniBikesStore]

it is instruction video how to instal big bore kit

[@pepeng2236]

Berapa mas harga motor gp nya

[@jepperasmussen2581]

To many mistankes

[@motojazda176]

Siema

[@mikoajwerbel9815]

Po polsku!!!

[@norbek_enduro_-1836]

Mi też

[@nathanthomas9530]

Hay pal wonder if you are interested in sponsoring me with your minimoto parts

[@Paul-lt9xz]

Hi

[@charliessonynetwork3439]

Idk what kit you got but you got ripped the F off buddy. Didn’t even come with head studs? wtf!!!

[@MrDoboz]

it's his own store lol

[@christoslandos3945]

Easy as fuck

[@d0mixxd632]

what is the size of the candle?

[@تحشيشمجتبى-ت3ط]

Hi