Scootertronics 139QMB Engine Upgrades

[NobbysPcHelp]

she's scary!

[mrawesomenessssss]

anyone else see how ugly she was

[bababega]

hi i have a 4 stroke 50cc scooter if i want to make it 80cc will i need to by exhaust or something else cause some ppl say it will only go for 2-3 months then i`ll need to repair something...

[zaurastar]

where do all live?

i need this 30 miles an hour is too slow for me..im a girl..i cant do this!

and how much faster will it go?

im in atlanta!

i am waiting to recieve a pink JCL scooter 2008 edition 4 stroke

[zaurastar]

where do all live?

i need this 30 miles an hour is too slow for me..im a girl..i cant do this!

[MrBorderghost]

Why do people say 139qmb honda clone i dont know of any 49cc scooters that had 4 stroke engines in from honda they were all 2 strokes accept the honda cub c50 or monkey bikes but thay were a geared engine and chain driven. were has the honda clone part come from as far as i know this is a mass produced chinese engine or maybe tiwanese as i think the first 4 stroke cvt engine moped was the kymco filly...

[lee47848]

@MrBorderghost old metropolitans from the 80's had the gy6

[MrBorderghost]

@lee47848 Are you sure i would have thought if they had a four stroke 49cc then why did they not use it throught the 90s on the likes of the honda vision and express etc i can not understand why they used 2 strokes for so long if they had a 49cc four stroke with cvt transmision that worked so well....

[lee47848]

@MrBorderghost yeah i looked up parts for a metropolitan it had all the same parts but i wouldnt trust that they would fit exact with chinese why i didnt get them. and i dont know why they quit using gy6 seams stupid they are very easy to work on.

[shcoloh]

What r u a DJ jump off a bridge

[NosBlaster]

hey, I've got a sym, stock engine, just took out all restrictors, malossi multivar and lighter sliders..v-max about 43 mph. Other 4 stroke 50cc scooters (aprilia scarabeo, kymco agility etc.) go about 50 mph with just the restrictors out..I just cant figure out why! Looked up countless german, italian and english forums but I just can't get an answer..

[chrilla1980]

Hello...nice vid.

I have a problem with my 139qmb engine and wonder if you know what it could be.

It is hard to start and i cant start it with the startermotor....sounds like it gets to much air or fuel or something like that.....

Things i have checked on it so it is ok is: throttel membrane,valves,fuelpump,spark is ok and comp is ok.

Would be great if you have any ideas what more to check over.

[elricdean]

dude stop the fucking drums

[josefho15]

Is 139QMB and gy6 same engine?

[MrBerenguer67]

i good video,if i fix a red cluch springs 2000pm what you recommend in torque spring same rpm or less to give best speed many tks

[edyrazor]

hello.i have a question.. i have a 139wmb 50 cc but my question is taht i can upgrade it to 125 or 150..i mean big bore cylinder?

[scootertronics]

Hey bud you better watch what you say here.That is my wife and Tommy Thunder will find you and I don't think you want that.

I guess you have got nothing better to do.

[GoranKPhotography]

hahahahaha

[pcipciak]

hey! i also have that scooter! it is Moto-Magnus Capro! i want to put in mine:

90ccm NARAKU kit

High-Speed Racing NARAKU transmission

bigger NARAKU jet

klevar transmission belt

cone air filter.

i expect that mine will have 13-15HP. what do you think about that?

[cummins243]

also would it be possible to put a 150cc gyg engine into my 139qmb scooter...

[cummins243]

if i get a big bore kit...do i have to buy a high performance camshaft or can i use the stock one....also do i ahve to buy a high performance exaust???

[scootertronics]

No you can use the stock cam and you also don't need to have hp exhaust but the perfomance will not be at its full potential. The exhaust would be a good choice and more needed then a cam. I would recomend the exaust if you want that big bore kit to do all it can

Tommy Thunder .

[scootertronics]

When adding an upgraded larger performance exhaust most times more gas and air are needed. Try high performance air filter and larger jet.

[shitnazz]

i wanna ask some question bout my scooter,

after i change a racing exhuast,my scooter become more worst,only up to 80kmh... wot should i do ?

[scootertronics]

add larger carb jet plus high performance air filter

[mahooma123]

nice :)

[NAPALMJUNKY]

thanx heaps guys, awesome video series, just what i needed to see to get me started, cheers from Andy in Australia...