70cc top end rebuild (2-stroke) 

Would it be necessary to upgrade the variator and clutch with the 70cc kit or can you get away with just a top end rebuild and a new pipe to support it?

I have a 2002 Zuma. Do you recommend plugging of the oil pump (injection), get a 21mm carb and go pre-mix? Any recommends on the jetting for the 21mm, with 70cc Pollini?

Thanks i followed step by step worked out great

Do you need to do anything with the carb going up in cylinder size 50 to 70cc?

Hi, I noticed on your rebuild video that you were working on a buddy. I recently put a 70 cc upgrade from the standard 50 cc. I left the stock carburetor and exhaust on it when I upgraded. When the motor is cold, it has very good compression and picks up speed nicely but once it is warmed up, I lose a lot of compression especially going up any type of incline. I noticed when I opened it up again that the piston was not hitting the top of the cylinder wall. Do you have any advice for me in this sense?

i have a vx50 with a 70cc bore and the pison ring broke off and got weged in the jug and the pison thats what i call epic motor fail top end that is

Isn't the cylinder also called the jug in these air cooled 2 cycle engines?

Whats the name of the longer spark plug you put in the cylinder head?

Great Video Does This Work For C3 As Well

Is a 70cc big bore kit the biggest big bore kit you can get for a 2 stroke?

You have to built a Piaggio 86,4cc 2 stroke engine swap 🤪Malossi MHR power💪

So buddy 50s and kymcos have horizontal minerillis like a bugeye or the vertical like a prebug?

g clips are a pain in the arss to get in lol

ty. good video :)

why was there no flywheel or headgasket?

Oui merci

do you have a video of how to drop a jog motor from a buddy? or roughhouse if possible

Where can I order parts besides eBay for an 09 Kymco sting/yup 50cc 2t? Thanks in advance...

Why not try if will run the engine or not? Start it up.

I though that the chrome ring goes nearby the top of the piston

Hey what’s the old spark plug you used? And the new one? I have a similar engine which is on my Chinese quad. Just want to know if I should do the same spark plug change you did. Thanks in advance.

Sorry Im a grown ass child😂

Your old plug is the same as the plug I'm running in my 96 jog.....interesting

That's nog a real minarelli verticale engine thats a realy cheap nockoff

Pgo is actaly a copy of minarelli

Do a a scooter with a piaggio engine tune it to its limits!

What park plug you used ? Have a part number?

hell yea man,straight to the point,them 4 strokes are a whole other monster huh?

This helped so much! Just bought a tgb key west of Craigslist and was told compression was fine, turned out it wasn't :( however he sold me a 70cc bore kit with it! Your video helped a ton!

Really satisfying to watch, great knowledge. Thanks!

Can you please tell me the model of that spark plug? Thank you.

G-CLIPS N PISTON RINGS,HOLY SHIT DUDE,DO THIS BUILD(MINE WITHOUT DETACHING) AND SEE WHY SOME MECHANIC CHARGES YOU 200$.ITS REALLY LIKE A 75$ JOB BUT WHAT A PAIN IN THE ASS,AND ITS THE SMALLEST PART (ETON BEAMER 50)

How did you take that entire thing off to begin with??

How much clearance do you need for the piston head? So it doesn’t hit the plug.

I have a Genuine Roughhouse and I bought a 70cc kit and I would like to know what spark plug should I put on it?

that wrist pin looks huge compared to the one in my kit,g clips too

What is the reference of the new spark plug that you put in?

Anyone know what spark plug he used for the new Polini kit? The longer one?

Minarelli knock-off motor, used in PGO scooters where i live, this motors downfall i the inlett side, IT SUCKS BAD!

Sure that not the crome ring is top ring ? Never seen a black ring as a top ring

Can i put one of these big bore kits in a pgo xl xrider ATV? 50cc 2 stroke

HOW... MUCH IS IT TO TAKE THE ENGINE OUT OF THE FRAME LIKE YOU DID... I. HAVE A BUDDY AN A ROUGH HOUSE . IM THINKING ABOUT DOING BOTH .. THANKS 👍👍

The simplicity compared to a 4 stroke. Wrenching would be a breeze.

that exhaust is too small its not going to perform very well you need a gianelli go exhaust or bigger

I replaced the gaskets on my 150cc and the inner gasket was leaking again at the bottom i took it apart and the gasket is properly seated what the heck happened and will it happen again? That inner case gasket was leaking on the top before when running the engine now the replacement gasket was leaking on the bottom.

ok hold on....I got the naraku minarelli 70cc kit and 70cc head and it came with the rubber head gasket AND a metal head gasket. I thought I was supposed to use both. Should it just be the rubber gasket?

Port timings mechanic ?

Thats what he said😂

What's the torque spec for the head bolts?

Thanks Matt, that's the engine my basket case Malagutti Yesterday has. Just moved to larger storage unit today, still got 10lbs stuff in 5lb box, made the decision, if my junk don't sell, it's headed for the dump, this is a scooter unit, still need to store and rebuild 3 other scooters. Love your explanations, makes the job much easier.

Excellent

so I got a 2008 kymco super 8 50cc 2t... I bought a Naraku 70cc bore kit. it only came with the cylinder part with the exhaust port and the guy had to swap out the 10mm piston pin and piston with a 12mm piston pin and piston. it also came with gaskets and piston rings... I swapped it over and got the rings on and cylinder sleeve on and lubed it up and torqued down. I didn't get to upjet it yet cause improper thread size for the jet I bought to go with it.. and the exhaust won't fit due to the exhaust port is slighted so I have no exhaust on it. I crunk it up and let it warm up and then turned it off. I also got a aftermarket air intake too. it will crank and run but when I accelerate it hardly will move at all. can you tell me the areas I can work thru to get the issue fixed? please and thank you

What's the best way to set the squish band on Athena kit I've been messing around trying to get this squish right for a week with solder and calipers but keep getting uneven numbers I couldn't even get close with the factory head so I put a o-ring polini sport head on it i hear it needs to be at .9mm the Polini head fit good hope it works ok

I would appreciate a video showing how to take the engine off the bike like you have done on the Genuine Buddy 50. What all has to be done to drop the engine/back wheel from the bike so it can be worked on up on a bench?

whats the new long spark plug part number? thanks dude love the vids!

Thanks man

Hello.Oil mix with gas changes when upgrade from 50cc to 70cc? Or it iis the same for both 50cc and 70cc? Thank You.

Have you done compression test. If done can you tell me how much pressure required to get best ignition?

Technigas Silent pro rust like hell if it doesnt get a coat. it can even rust so much that you can get it of the cylinder without breaking the cylinder

If the bore is changed to bigger displacement and if the fuel injector is not programmed accordingly then will it work?

I heard these were easier than 4 strokes but I didn't think I could do with my eyes closed... Holy fuck that's simple

The script on one side of the ring goes up it's usually the letter N stamped on one side of the ring ...well that faces up

I replaced everything as you showed, but my scooter wont start for nothing. It starts for short time with start spray, but then dies and wont start

where can I find a good name brand big bite kit, would you recommend one? Thank you

I have a tao tao 50cc scooter. it has a 10 inch wheel on the front. any way to put a 12 or 13 inch wheel on the front?

Does the shroud even cool how is it not cooler with it off and the fins receiving air honda doesn't do this 🤔

Where can I find a replacement base gasket (that green one) for a roughhouse 50

For scooter with fuel injector, change of cylinder kit is possible?

Hey rolling wrench I'm looking to buy one good used one let me know if you got one

The black pistonring are supposed to be on the bottom on most cylinder kits

Is this the same engine as a 2006 SYM Jet euro x50? Please let me know.

What do you recommend for premix?

Is that fit on my kymco super 8 50 cc 2012 model

Thinking replace hold motor out to custom built gt6 go kart motor?

I have 50 psi after big bore on my Keeway 49 Fact. What could be a problem?

I'm glad that its a pgo big max motor

So whats better a 2stroke or a 4stroke i got a buddy he gave me a 2stroke and another buddy has a taotao 4stroke but id have to give 80 bucks for it and bad thing is no titles

the only problem i have at my house is space,same exact engine,this can be done without taking engine off the scooter correct?

how many cc is thi scooter

How much did it cost

What’s the spark plug

Imam kumko agiliti citi 50 2t r16 koji cilindar od 47

Do you upgrade the carb ? I mean re-jet and what is the main jet size for this particular PGO SETUP ?

Exactly what kit did you install and where was it purchased?

Excellent ! come to Brazil!

excessive vibration on engine....not balance cranshaft

I was wondering if you could give me some ideas what would cause the end of the crankshaft to snap off. This happened to me with a gy6 50cc engine

did you use the same piston?just for show?

its not a jog motor it a PGO HOT 50 motor

Do two strokes not have camshafts???

wheres the fan?

I advise you: remove the cap that obstructs the entry of air. it is likely that you can melt the cylinder