Install Big Bore Kit 50cc Scooter - 80cc or 100cc GY6 139QMB Engine

[@doublewide6]

amzn.to/2hlBHvK TaoTao Thunder Scooter Pricing / Specs. amzn.to/2ysvcOh Glixal Big Bore Kit 50mm amzn.to/2yqLgQT Scooter Tuning Tachometer amzn.to/2hkMXIr Goofit 50MM Big Bore Kit amzn.to/2ytMwmh Variator Roller Tuning Kit All weights amzn.to/2yrtRaw Gates Powerlink Variator Belt amzn.to/2ysU1Ka Glixal Performance Carburetor

[@rimantassadeikis3515]

sorry for disturbing but did you chose 80cc or 100cc ?? thanks hoping for reply :)

[@doublewide6]

amzn.to/2ysvcOh Glixal Big Bore Kit 50mm This is the kit I went with. It is 50MM which makes it 100cc. I kept the original head for more compression.

[@carlosmartinez-yh5ps]

is it a 64mm or 69mm head that u put back on i have a 50mm big bore kit but i dont now what one to use i have a 139qb 50cc moped

[@jeffmee763]

@@doublewide6 it's about 82cc not 100cc

[@black_booger5520]

tune the carb, I just did one of these 80cc kits, came with a 50mm cylinder and torn gaskets, ordered some spare gaskets and jetting kit, also had the luxury of research and time when doing this, DO NOT FORGET TO TUNE THE CARB, PERFORMANCE PARTS MEAN BIGGER JETS! was running an 78 main previously in the carb ran like a bat out of hell and was getting hot real quick, brought it up to speed with an uni air filter and 95 main jet although I should probably move down to a 90 or a 92 still testing but today was my first ride, also you might need a spare cdi since mine blew when I flipped the polarity on the stator by accident. have fun remember 16 foot lbs on the bolts that hold the rockers on and 7 lbs on the bolts that hold the side of the jug in. if the scoot sounds lean and mean then up jet

[@scrambler69-xk3kv]

Once you suddenly loose all air from your rear tire at 40mph like I did you will no longer see a need for a big bore kit. A real eye opening experience for sure.

[@larrykeesee1442]

Good job doublewide ..This job is harder than it looks..I used Lucas break in oil for about 100 miles to stop the smoking..Retired Larry..

[@jeffmee763]

You need this more on the 52mm setup as it is a tight bore.

[@exploringwithgriz2079]

Most people do these but have a stock carb ya Need to upgrade jets or buy a bigger carb,I’m doing a customers scooter right now a mvp but they are doing the whole nine yards not just the engine upgrade, my man ya did damn good for a first time ever installing one of these, I always use AmsOil for all my engines

[@jeffmee763]

You are right a 20mm carb and 90 jet 35 air with a cone filter works well.

[@bobcormier5098]

Nice job. ....i have question i have 50 cc gy6. I wanna do 100 cc big bore ......so can i use my cam. And rockers and rocker shafts work on big bore kit ?????????

[@BrucesShop]

Great job Bob. It is hard to film intricate work eh. You did well. It looks pretty high quality internal pieces.

[@WE_OF_THE_NOV]

You would think valves marked with "EX" would be Exhaust. It might be a good idea to use cross tighten/loosen technique to keep from warping warps, maybe it's not that necessary with a 500cc, but as you get to larger engines, it's a critical must.

[@bigmdesign9616]

Always fun doing a big bore kit !! Great job buddy

[@doublewide6]

Yup and performs much stronger with the big bore kit installed.

[@doublewide6]

This one is a little bit more fun than the average chainsaw big bore kit project. Thanks for commenting Mark.

[@billiewright7532]

I've done a bunch of these. I tie a piece of electrical wire on the timing chain just in case it wants to fall back into the crankcase

[@lenwoodcruze3594]

What jet sizes are a good starting point? All I have is a aftermarket air filter and orange CDI/coil....78 main jet & 32 pilot jet.

[@alanalilley3037]

85 main pilot jet should be fine

[@jamest.5001]

I recently installed a kit on a scooter same 1P39 QMB, I will definitely remove the engine, or put the scooter up higher where it can be easily accessible!

[@florisj92]

Maybe I have missed the part, but is a bigger cylinder head necessary for a 80/100cc cylinder?

[@gregdorsha2335]

Good video. I would have liked more close detail. Thanks for including parts where things weren’t going 100% smooth. Great on screen attitude, it seemed that you had done this before it all went so well.

[@retrorestore]

Top job Bob, It should have a noticeable increase in power but I wonder if a bigger main jet in the carb will help.

[@doublewide6]

I put in a new carb it is the Glixal amzn.to/2ysU1Ka it has a stock 85 main jet, but I bought the jet upgrade kit, which comes with about 10 jets. I have not had time to work on the tuning as I just put the BBK on, but I will be making future videos on tuning it up.

[@doublewide6]

Actually, I think the stock jet is a 90 main jet 30 idle.

[@retrorestore]

Ahh, Yes Bob, I missed the link in your description.

[@WE_OF_THE_NOV]

looks like the TAOTAO is basically the same as my Wolf RX50, that good to know.

[@aleblanc3547]

It takes a lot of guts to tear into a brand spanking new machine, then again at least it's nice and clean when you work on it! :>) I appreciate you taking us along on this one; it didn't look like rocket science and I know it's going to make a world of difference. I haven't checked, but I wonder how much you saved by upgrading a lower powered machine verses buying a larger powered one?

[@gerrynightingale9045]

As long as you're not interested in longevity, you can 'mod' the crap out of the Chinese engine.(you'll know when 'I guess that was too much!' when the piston seizes from cyl-head-temps going ape-shit) You're right...get a 125 or 150cc scooter...the time & money you put into a '50' to 'make it faster' eventually becomes moot on a vehicle w/a wheel-base and wheel-diameter that was NEVER intended to do 70mph...! Hit an unseen pothole because you're moving that fast...and you're 'all done'. (I've ridden a 'full-mod' fifty w/the 'GY-6' upgrades at 65mph...and once was enough! A series of 'black-top''ridges & ripples' from heat buckling the road was enough for me...someone w/less experience riding a small scoot that fast would have been in 'deep shit' because the front-wheel was actually oscillating so much I'm surprised my old fat ass didn't start scraping pavement! It was like 'hydroplaning' with no water on the road...the only reason I wasn't 'toasted road-rash' was from slamming the REAR-BRAKE ONLY down as hard as I could to slow) I'll stay w/my "Metro" upgraded to 42mph on level-road w/light-wind...it'll 'pin the speedo' on downgrades, and even 50 is 'too damn fast' for the little Honda.(I started the Metro up this morning...and it was 9-degrees out! It ran PERFECT...I just wanted it to idle for awhile to circulate everything...who can legitimately demand 'MORE' from something that's already damn near perfect 'as-is?')

[@zadokmotorfreight2423]

Man, that was a really good video!!

[@michaelskagen1]

Have you thought about a toque converter pullys to take the place of the cvt pullys that are in the bit like the comet 30 sireas torque converter set up just useing the pullys without the mount

[@robertmotion]

man this is a simple and easy to follow video. thanks. new to CS repair. gotta question tho ... the bore kit your purchased only has a few components, why do the other kits sold on Amazon have so much more components to install a bore kit is this kit the bare necessities? i like that. if ain't broke...don't fix it. /Bklyn👑

[@johnrobinson4639]

And on the emissions tube on the front of the cover has to be blocked with a piece of gasket

[@joonasjuujarvi4943]

John Robinson booi colm down whit these comments

[@larryhullinger4141]

The aftermarket big bore kits don't have those

[@larrykeesee603]

I USED LUCAS BRAKE IN OIL ON MY REBUILD..THE RINGS ARE HARD TO SEAT IN...

[@thedaydreamer7972]

Great video, I have couple questions, If compression is an issue with a scooter, or even is the bike runs erratic and you have tried everything else, does rebuilding the top end, say going to a 100 BBK fix the compression issues and possible issues with the way the bike runs?

[@reelormondfishing]

Will the Big Bore Kit work without boring the engine block

[@christopherdarrough2667]

Little trick to that timing chain put wire tie around it that way you have something to pull on then cut it off when you put the cam in

[@christopherdarrough2667]

The head gasket holds the bottom guide in place there's a Allen head bolt behind the Cvt that holds the top when in place

[@watermanone7567]

Very nice work. Do they also make a different cam? Also do they have a carb jet kit to give more fuel with the big bore piston? Thanks for the video's.

[@doublewide6]

Yes they make an A9 cam for it. I bought the Glixal 20mm carb amzn.to/2zA0UNk because they sell a small kit with 10 main jets for tuning.

[@Smodlee]

Mine is smoking what would cause that after I did the exact thing what u did? Should I put better grade oil the scooter is brand new 2022 and don’t know if it’s got that mineral oil in there for transportation

[@fenceman7067]

Did he ever make a updated video after installing BBK

[@davidl7134]

I am going to have to do this just don't know what clutch is best for 100 cc and my bike.i don't know if I can use stock clutch and variator with 50cc to 100cc upgrade lol

[@angelluna1582]

One question, did you use the same cylinder head-cylinder head for the 100cc kit?

[@petefroud5308]

Great job . Nice tip on the clip install Bob .

[@doublewide6]

Thanks Pete. It worked out well that way. It is probably a little safer to assemble on the bench also.

[@petefroud5308]

To right Bob the clips can be a pig to get in .

[@dlcoyte]

WHERE did you get that muffler from...??? I like it a lot.. Did my own carburetor and now going to try doing an 80cc bore kit next on it... Wish me luck...

[@devonsutton4562]

I have a question what size carburetor did you put on that Big bore kit is that a 50cc carburetor an 80cc carburetor 100cc carburetor or a 150cc

[@amithapriyangika7241]

How many years can i use a scooter with a such modification

[@cemtkeenan2750]

Can i use a 80cc head on a 50cc cylinder? Or can i only use a bigger cylinder with a smaller head not other way around?

[@miguelorejuela3592]

i also have a thunder 50 I'm wondering if you would know what size roller weights can i use to make the scooter faster ?

[@BackyardRevivals]

Roller weights wont make the bike faster unless your weights are out of whack, you could try removing 3 of the 6 rollers and you'll either see it go faster or slower. If it goes slower try heavier weights.

[@TheWickedclownz123]

I’m surprised you didn’t get a new cam

[@IosuamacaMhadaidh]

So how long a job would you say this would be for someone mechanically inclined but hasn't done this specific job yet? I have a Tao Tao that needs a big bore but it's my only ride at the moment and if something goes wrong whatever I only have 2 days off a week. It seems like an hour or so. Sound about right?

[@Volusiaev]

I don't know if I missed it, but does the the carb need adjustment or bigger jets because of the bigger displacement?

[@iantahmasbi]

I would assume just a bigger jet.

[@mhxxd4]

Mine worked just fine with stock carb

[@mrdkuss5012]

Just what I was thinking I’m sure it will do ….defo will help a lot ,!

[@lavanicm]

Can you use the same carburador or you use other carburetor with more capacity??

[@PortugeseWalrus]

What kit do you prefer more? The Glixal or the GooFit? I need to replace my top end and I would like to just do the big bore kit instead of going back to stock. Thanks!

[@doublewide6]

Glixal

[@PortugeseWalrus]

Is there a Glixal Kit that comes with the head and the valves?

[@PortugeseWalrus]

Also have you heard of the brand IMPUSA?

[@Lorddarthvader1701]

This has been interesting, I kinda wished I did that with the Honda Metro's that I used to have. Would have been a cool project

[@doublewide6]

The Metro's are nice little bikes I think the new ones are even fuel injected and liquid cooled. They are also a much more reliable scooter than the typical GY6 Chinese scooter. It never hurts to by handy if you are the owner of any scooter.

[@gerrynightingale9045]

The Honda cannot be 'modded' this way...because of the liquid-cooling factor.

[@chapposhoez5319]

Did u break in the engine or u switch it new?

[@AllenMacalehanister]

I installed the big bore kit and it starts and idles but when I give it throttle is doesn't drive it just revs up a bit. Did I adjust my valves wrong?? I hear a slight clicking from the head so idk. Please help I'm so stressed!

[@ironicmanx9886]

minibike4ever02 1 probably but first adjust the carb by installing bigger pilot and main jets and the the low idle by adjusting the screw.

[@AllenMacalehanister]

@@ironicmanx9886 Figured it out valves too loose stock carb runs amazingly no bogs, Thanks for the help M8!

[@iTsMike010]

Why do you have 2 Bore Kits listed in the decritption?

[@thijsiphone]

i just ordered a glixal 47mm kit whats your opinion about the glixal quality? because those cilinders are really cheap! i only payed about 30 dollars including shipping. btw thanks for the great video! and a little tip i would never use the electric start because if your timing is off you would have destroyed your valves or piston.. i would reccomend using the kickstart and kick it gently for the first time.

[@doublewide6]

I ordered amzn.to/2ysvcOh Glixal Big Bore Kit 50mm and really thought it was a very good value for the money. It is winter here, so I have not run it too many miles with the new kit, but I am looking to make some more video updates this spring. I have already notice a HUGE improvement over the factory performance. I really like the scooter, in the spring I'm going to set my variator weights for best performance.

[@thijsiphone]

Thanks for the response. I bought a set from aliexpress including a A9 cam koso variator derestricted cdi box and the glixal 47mm. Did you chance the jet also? im running a 85jet now with my stock 50cc what size would you reccoment trying?

[@thijsiphone]

And its good too see that your performance is much better with the big bore kit. im looking for power because stock 50cc 4 stroke is sh*t when it comes to power lol

[@joegriggsjr.6511]

My so called "needle bearing" went bad on my bike. Under warranty but of course I am going thru it with manufacturing comoany but in the mean time. I have options. Guy at shop offering another stronger engine 70cc or the same engine replacement. Stronger engine$320 same engin repl $160. Or just let warranty do its job. My question is what if I ride this bike that hard that it would just tear up again, y would I put the same engine in it? Why not go with the upgrade? Although it will void my 2 yr warranty unlimited miles. Oh yeah. It's been 8 months since i bought it brand new. Using right oil and right gear oil which is where my arguements with the manuf come in at but i just sent proof today that i have been servicing th bike myself today. I saw an ad on your video "something.....sol". About warranty rights. I am watching the video for the 2nd tim but no ads came up fo me to get that info. Love the video.

[@beatdowngaming8423]

What oil should I use for my 80cc bbk ?

[@لطيفالحلفي-ح7ض]

I have motorcycle Honda spacy skoter 100cc. I need to just the jacog. What namber felar should I use inteak and namber feler Exhaust

[@Okiramasu]

can you use the 50cc head with the 100cc piston?

[@xxxdemonitation9538]

can you still ride with no license or is it considered higher than 50cc

[@AllenMyron-u7d]

Good job

[@AllenMyron-u7d]

Myron

[@jackke3707]

How many mph did you gain? And how much torque was there. Loads more or not much

[@doublewide6]

amzn.to/2rEL0ib this is the kit I put on. Love it... Lots of bottom end torque and top end speed was up by at least 5-6MPH. I need to get my variator weights adjusted I'm running 7oz. and it needs to be heavy for really fast starts. I'm waiting on spring to get everything tuned in, also don't want to kill engine until it is broken in. Great kit no complaints from me.

[@Josh-li2ds]

What are the 2 little plastic rings for

[@fozzysrchobbies1343]

Hello I know this video is a few years old , I do have a question though. ? I just installed a 80 cc big bore kit into my scooter and it sounds like the piston is knocking. I have taken it apart again and cannot find anything . Piston is nice a tight in the sleeve, rings are clocked spaces are offset from each other. I also checked the timing chain there isn't any slop in it. Both small holes of the cam where in line with the head when put back on. Valves are set to spec. It runs and idles and there isn't any performance issues just has a knock and its driving me nuts. Any suggestions . Thanks

[@fozzysrchobbies1343]

@@onelove8509 yes stock head . I took it all apart again. It seems that the metal gasket is the issues there is a slight variance in the cemter. Top of the piston is hitting it. I'm waiting on a new gasket. I have read several different settings for the valves. From .003 to .005 on top. To .004 to .008 on bottom. ..... Thanks for the info

[@storckbeats1971]

I installed an 80cc big bore kit onto my 49cc moped tao tao and it was running but was only pegging at 30mph? what is the solution to this?

[@jasonharris2790]

How is it running for now?

[@allenthomas914]

How much faster does it make it?

[@ericgalarza776]

I think the ppl at the shop I got my 2017 binteli sprint have been over charging me plus using used parts! 80cc bore kit for $80! Full maintenance $70!$150 for labor! Damn labor cost more than the parts!

[@tellmesomething2go]

scooter shops charge more than automotive shops. $35 an hour should be good. Shops charge $40. and up for oil change. I can change oil twenty min. $20. plus $3. for oil, if you want to charge for that. Some of these shops get out of hand. Try to check around.

[@christiangang3144]

It that a 64mm or 69mm valve

[@stauf09]

How do you fix a 50cc spark plug socket when it gets loose.or when treading can't hold spark plug no more

[@whitechrist2965]

You can buy a spark plug hole repair kit at any auto parts store and you can search KZbin for vids showing examples.

[@johnrobinson4639]

It sounds like he doesn't have the rocker arms adjusted right.

[@jeffmee763]

What is the compression psi on a 50mm setup with the standard head setup thanks if anybody knows. Jeff

[@viosog9661]

6 bari

[@JohnCalebWarren]

Love the video, I just picked up a 50cc scooter for super cheap & plan on doing the same thing. Would you recommend going with an 80cc or 100cc big bore kit?

[@WeRise445]

Mine lost power 🔋 won't start any more. Been sitting for a while now.

[@worlds_flipers76]

What kind of oil typ the cylinder

[@carlossanchez8135]

Which one bore kit that brought like $

[@nashguy207]

Good Job Bob!!! I'M curious to see how much torque and mph you gain from the upgrade. Let us know.

[@doublewide6]

I will let you know if future videos thanks for watching.

[@soli5257]

doae it work for 2 stroke?

[@MissouriOldTimer]

wow, that cycle isn't nearly as expensive as I though it would be..

[@doublewide6]

Yes, I know. I was looking for used scooters and they were priced more than the new ones. If there is a local dealer they add $500 to the price for unboxing and assembling the bikes. I was not sure about buying it online and having it shipped, but as indicated in my last video it arrived perfect and I can't believe the quality of the build. amzn.to/2hlBHvK TaoTao Thunder Scooter Pricing / Specs.

[@garyhogan7449]

Wouldn't it have been easier to completely remove the motor from the frame ?

[@dokesz530]

2-3 times full throttle open before u start the engine.

[@johnrobinson4639]

when I had put the big bore kit in one of my customers scooters scooter it started up the first time I had hit the starter. You don't have to use the kick starter, all you have to do is push the scooter just enough to get gas to the filter. It is my opinion and mine alone that this guy tried but he skipped a few really important facts.

[@kenshi600]

What did he skip?

[@brianboyd8882]

Thanks for the info, even though this video is a year old. I jus installed an 80cc kit in mine and it's not starting and I changed the spark plugs and will try this

[@johnrobinson4639]

And he is talking inch lbs. instead of ft lbs which myself have always used ft. lbs. I have never heard of inch lbs myself

[@larrykeesee1442]

John Robinson the head torque is 13 to 16 ft pds..

[@cubanassasinmma1648]

Why do gringos say teio teio?

[@budo138]

72 cc

[@victoruntila4498]

80 cc it's 100 cc

[@amatureskater15]

"Tay-0 Tay-O' hahahah got damn bro.... least try and say it right

[@hondafreak232]

YOU FORGOT THE GASKET FOR THE CYLINDER !!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@jailbreak5755]

I noticed too

[@jeffmee763]

@@jailbreak5755 No, he said he put it on you can see it is on.

[@michaelhightower8160]

🤨😳🤔WOW!So how can you tell an 80cc big bore kit from an 100cc Big bore scooter kit?🤨 Because if I order a 100cc scooter big bore kit that exactly what I want my order to really be. Because if a seller sends me an 80cc 👀😡🤬and I paid for a 100cc big bore scooter kit .I am going to let the seller know right away so I can send it back for my full refund back😉👍.Lol don't just send me anything..

[@troyeddings6577]

Five or 8 mph, it's not worth it!

[@larrykeesee603]

I USED LUCAS BRAKE IN OIL ON MY REBUILD..THE RINGS ARE HARD TO SEAT IN...

[@greedyfbaby]

do i need to change my crankshaft and rod to put a big bore on my gilera runner 50cc?

[@larrykeesee603]

I USED LUCAS BRAKE IN OIL ON MY REBUILD..THE RINGS ARE HARD TO SEAT IN...

[@larrykeesee603]

I USED LUCAS BRAKE IN OIL ON MY REBUILD..THE RINGS ARE HARD TO SEAT IN...