ScooterNations - Fitting A 70cc Cylinder Kit/Big Bore Kit 

Thanks so much for the in depth tutorial, I feel much more confident about doing this myself instead of bringing it to a shop now. thanks!

Even though I couldn't understand a word he was saying. This is one of the better vids I've watched on this procedure.

The arrow on the piston should face TOWARDS the exhaust exit on the cylinder, so not always down. If you don't do this the piston rings gonna explode and rip your cylinder.

Took me a while to realize he was speaking English... My dumbass thought it was german or some lmao

Great video, helpful walk through instructions

You did all the job very good and very carefully. Very nice video.

Brilliant video, thanks for sharing.

If I didnt have a best friend from Manchester, England..(and I am a Southerner from Dixie , so) I would have been really lost. Not saying the dudes a Manc, just saying that a Manc makes up brand new English words on the fly. Its a damn crime what they do to the English language, but I love them. Takes a patient ear and some getting use to. This dude may be Irish. Very fine mechanic this man.

are you upgrading your motorcycle in your kitchen! nice!

epic sound quality dude

Hi tks four your great video, wheen you up the cylinder four 70cc or 75cc you need to put a little extra oil wheen you fill the petrol tank or not need? Tank you BERENGUER

Nice!excited&nervous

Cheers! ill be doing this!

I used to do that stuff on my moms kitchen table lol!

Is it regular Two-Stroke oil that you mix with gas that you smeard on the cylinder?

gracias desde Colombia.

I just bought a genuine buddy 50 2stroke. Is this rebuilding. Engine the same step ?... And like the video best so far

This looks like a Polini Corsa Mid-Race cyl kit for a Piaggo engine. am i right?

So obviously after doing this you'll change the jets but will you change the spark plug?

iv got a 70cc bigbore kit on my vivacity x-race only had it 3 weeks workin fine then cut out and wont start again i cleand everything it started fine worded all day and night then wouldnt start again i baught brand new carb still wont start any advice please ?

Hi thks four video excellent I have a Piaggio Zip 2T I have a sport exhaust or ready I like to fix a 70cc malossi kit my carburettor is standard Dellorto 17.5 can you please let me know whitch jet size I use on many thks mate

What colour is that gunmetal grey? And where would i get the spray paint from

Greetings. good video. Could you recommend me a cylinder for a tecnigas triops exhaust. my scooter is gilera runner50cc a.c. Thank you

hello im putting a 100cc big bore kit on mbk mach g ive got a 21 mm carb what size jet do I need to put in thank s

Hello guys! I want to ask if original is 50cm cilinder, but im putting aftermarket 70cm cilinder to scooter, what about exhaust mounting? Do original exhaust bolts wil fitt on bigger cilinder? Thanks for answer :)

Also Whitch best size carburetor nakaru 19 or 21 tank you very much

That is a very informative video! I am still confused on the circlip in terms of specific orientation, location, removal, and reinstallation. Everything else has been really good in psyching myself up for my first BBK installation.

Nice video well done and put some more thk

what size are those piston rings I need replacements?

oily thin lil head gasket is chronic as hell what was that astroglide?

great vid. dose it change the distence of where the exhuast conects to the cilinder head ?

Do you know of any mods for a 4 stroke zuma? I have the 2014 50fx

Hi I have a Japonese scooter Sym Fiddle version 1 I by a 75cc nakaru cylinder to fit on you thing if I use stand carburetor we give more speed or I need to Chang the 19 or 21 carburetor tks

did u use 2 stroke as lubricant ?

How many miles to wear in the kit

yay!!! a good luck cat!!!

hi i am about to fit my yamaha jog cv50 with a 70cc big bore kit and i am wondering what i need to change my jet size to. thanks.

Do you fix engines in the kitchen??? O.o deamn i cant do that...

tried this today and the frame fell and bent the mount screws for the big bore kit thats my life in a nutshell lol😂

Hi man, with 70cc cylinders specifically with stage6 ones that i got. I noticed that if i won't warm up my scooter for like 5mins first thing in the morning for my daily use, it will have that bog down on takeoff at 1/4 to half throttle which will be gone after a after a few hundred meters of reving up. But if i warm it up its mainly fine.

What bike is this? And engine?

very nice I like

Is this worth doing ?? Or does it knacker the bike ?

21mm dellorto carb best one

I think its better to change the conrod and the bigend bearing as they will have to cope with more power so it would be safer

i have a 70cc cylinder and piston on my speedfight 2 i beleive i need to change the exhaust and carb jet aswell? is that the only things? and if so what size carb jet and howd you do it. thanks

No channel porting needed?

Hi i have a 70cc and yes you nedd too put oil in the petrol tank.

just recently did this and I am having and issue with as soon as you apply throttle the engine wants to bog down/die... any ideas?

Is this all I have to do? I'm buying a Tomos sprint that only goes 25 max speed stock engine but heard if I buy a 70cc arisal kit it'd reach 45. Please anyone feel free to answer

Just asking can the 50cc stock crank hold up to the stress and pressure of a 70cc kit because i dont wanna get a 70cc and it breaks after a few days

does scooter stops throwing white smoke if the mobil oil is very less remaining in engine

Nice video, too bad I can not understand ONE WORD THIS MAN IS SAYING!

what lube or oil did u use to lubricate the inside on the cylinder etc.?

Where is the original Head gasket? That is why the head looks likes its leaking? No Disrespect, just wondering? 5 star vid. RH DDS

thank

I know it gives a whole lot of trouble, but doesn't it bother you to mount a new cylinder, specially a 70cc Polini which is my favorite mark btw,without 1st having cleaned all that greasy filth all around that cylinder area? Not only may dirt and/or solid residue fall into the crankshaft compartment but also such a special part sure deserves it to be done. When I fitted my 70cc Polini aluminum cylinder,God knows, how clean and shiny my engine block was...

Hi tks four your video good info tks, I fit my 75cc on my 50cc scooter and now wheen I drive the engine is very very hot I don't know before whit 50cc I don't check, wheen I fit the new 75cc cylinder I don't fix back the cylinder cover I just drive and I find is very hot my question is a normal or not tank you

hey does this still work my mate has a 70s kit on his aprilia rx50 and hes even had a hole melted in the middle of the piston ??? it hasnt lasted long

Nice cat

I like watercooled 50cc

He's working on a Piaggio Zip 2 stroke engine.

hi, what torque the bolts to be tightened

lol pretty risky putting the piston pen springs on their spot with your block right under, all open xD

please make sure you compress your piston rings i did it and snaped them

el único comentario que yo hago es que deberían presentar también montages y ensamblajes de toda clase de motos importadas y colombianas como es akt esport y enduro y hasi sobre todas las marcas de motos anivel mundial

what kind of oil are u putting on the cilinder with ur fingers?

what size main jet do get with kit

Simple as that

That's a Polini 70 cc Big Bore kit?

Good video but you failed to do several vital steps related to engine re-assembly. Even with a suposidly bolt on kit it is still always advisable to check ring gap clearence and I would never start that engine before first checking your squish clearence. Sucks to have a spark plug through the top of your brand new piston crown cause you failed to do a simple check.

What lube did he use

Lol your cats pissed no foods out,

can i use a malossi piston in a stage6 70cc bigger kit?

can this be done without dropping the engine ?

your meant to put cloth behind the piston in case the clips drop and make sure arrow on it points towards exhaust , hahahahah

My clyinder dosen't come off. The Head comes off but the cylinder not.

Where’s the cylinder gasket

you do realize that in the way that you're talking more than half of what you're saying can't be understood?

Cherche piston ax100 Suzuki

1:07 cat!

I got an CPI Oliver city i just bought for 320 euro it dosen't run well in the engine cuz it needs a new piston, but starts very well Also i need a new Brake disk and Caliber and then i got a scooter in perfect condition :D

more fuel new jet for carborator, remember and clean where the seal will be and tighten the screws a little here and there, not tighten hart immediately, see that it does not fall shit in the engine and see that you do not lose clips into the engine

I’m about to do this on my motorbike too, now I know to take the bla faa bla waa waa and put it in the waa faa waa faa bla bla bla faa 🤫 I almost had it.

778 thumbs up for the cat! :) Good video otherwise too.

What are those long sticks called that holdes the cylinder in place? I know the word in danish, but can't find anything in english

Sorry, can you post a video about the 60 speed Vino engine how to blow a motor to learn from you. Or videos. IAM from Iraq. And your Facebook page name

Are you speaking Klingon?

You cannot use nyloc nuts. They would melt.

What the Hell kind of engine is that, Mate. Cheers. RH DSD

You forgot to see what your squish was

cilindre 46 mm ? Its may lets 2 fail!

هاي

47,5mm is a 70cc

Could you add some subtitles? The audio is truly terrible and kind of makes the guide a lot less helpfull

whaa?

:D

Simple as that lol

You should always upgrade the crank and bearings if installing a 70cc kit. These WILL fail if you don't.

give the answer when are riding 70cc it will use more fuel