50cc gy6 scooter Big bore kit install and test
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- Опубліковано 17 сер 2022
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Today we do a 50cc gy6 scooter Big bore kit install and test. We got this kit from amazon and we are 95% happy with it so far! Time will tell what this kit can handle. We are excited to finally install this big bore kit and start the next level of upgrades to this qmb139 scooter. We will have to re tune everything to squeeze out all this kit has to offer.
DISCLAMER I am an Amazon affiliate and may make commissions on the products linked here.
PART LINKS
FOR 15OCC GY6
variator weights link
amzn.to/39ObiFn
cdi box link
amzn.to/39DyjdP
NOTE: this cdi box only worked on our 150cc gy6 scooter.
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FOR 50CC GY6
BIG BORE KIT LINK
amzn.to/3SXx7UX
CARB (this is a stock carb!)
amzn.to/3WLL3n3
20mm MEDIUM PERFORMANCE CARB! (for BBK, still works with stock setup)
amzn.to/3N8VDBm
variator kit
amzn.to/3M6M6YY
PERFORMANCE VARIATOR KIT (THE BEST YOU CAN GET)
amzn.to/3JenwGb
Variator weights (5s were too light... get7, 8 or 9 grams)
amzn.to/3M1LbZw
50cc GY6 belt
amzn.to/3PkoCBA
BEST PERFORMANCE CARB !!! ( YOU WILL NEED THE THROTTLE CABLE AND INTAKE MANIFOLD, AND AIR FILTER LISTED BELOW TO FIT THIS CARB)
amzn.to/3IRAg50
THROTTLE CABLE FOR PERFORMANCE CARB
amzn.to/3pV3auN
INTAKE MANIFOLD FOR PERFORMANCE CARB
amzn.to/43i8ZRI
AIR FILTER FOR PERFORMANCE CARB
amzn.to/43fjO79
GEAR WE USE
MAIN CAMERA
amzn.to/3WbSrak
SECOND CAMERA
amzn.to/3hHdpyR
ACTION CAMERA
amzn.to/3Wfi89U
ACTION CAMERA MOUNT
amzn.to/3jjZO11
CAMERA MIC
amzn.to/3j7xSgz
CAMERA BAG
amzn.to/3Vmt9W0
DRONE
amzn.to/3GhNV4R
DISCLAMER I am an Amazon affiliate and may make commissions on the products linked here.
MERCH
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Any suggestions for a new exhaust set up??
Fake akrapovic da best one for performance
Also get the mini bike nitrous kit 👌 it's nice
Update running a 90 jet and a 35 slow running jet on the 20mm carb as a 32.5 one. 1500 con spring and 1000rpm small springs work for me 5.5 rollers.
It needs porting polish in the cylinder head area and my suggestion is to use a Keihin PE/PWK type carburetor size 24 guys. I feel that on the Honda Beat 108cc carburetor can easily reach 120km/h
I just installed the glixal 52mm 90cc big bore with a naraku big valve head on my taotao thunder. It buried the speedometer to 45mph in just a few seconds and even held that speed up a hill. Stock carb with a 91 main jet and stock cvt. The power is insane and it hasn't even been tuned yet. If you want more power go for the 90cc. You won't regret it. Good luck guys I'm looking forward to more content.
That sounds awesome! Thank you🤘 should be another summer filled with scooter vids
I did the 80cc. Definitely a huge improvement. It’s still not going to break any land speed records but I can get to 40 within seconds now. Before it took 1/4 mile and a struggle to get to 43mph. I’m quite satisfied with the upgrade. Only thing I need to do is a valve adjustment. Too much tapping noise.
90cc will eventually break the engine, 80cc is the safe way to go you can enjoy it for a long time if maintained correctly upto 30k miles maybe even more depending on how you ride.
Guess ill have to do mine.. ive already put a Racing clutch, New rear drive gear, New ECM with rev limiter disabled and a Coil pack from a 150cc.. And i can get about 45mpg on flat ground, And 55+ with the wind at my back.. And im still 49cc.. Might have to use more synthetic oils if i put the 80cc kit on.. But i think you inspired me to do it and record it..
that old setup wasnt stock looks good man i love your videos im building my gy6 too
oh this is great timing. i just changed my carb this afternoon and i was considering a bbk as well. you guys are an inspiration (i'm not sure my better half would see that as a good thing, but i love it)
At least parts are cheap! Lol it's all for fuel saving science right?
@@throttle_therapy LOL yes! has nothing to do with tinkering and making it go faster. it's all about the fuel savings. that's totally it 🤣
Man, my wife said the same thing about messing around with these cheap mopeds. I told her you know what? I like it.
@@hybridorbital85 that's kind of what i said lol. i'm not sure it worked though.
Thats literally my favourite channel
Want more top end change the rear end gear ratio comes 13/1stock! i put in a 10/1 gear my top end is 50mph i weight 230lbs. plus i did the big bore kit and carb and cam!
Put a motorcycle carburetor and motorcycle coil and put highest recommended tire pressure and you can add 5 mph. I have done a few upgrades.
Dude, I got a 2008 yamaha JOG R 50cc. Only thing done to it was removing the spacer off of the variator. It does 49 mph
Bikes running rich. The deep sound gives it away. Go down a size in jets for more power
So I clicked on your video and when you lined up the new piston to old. They look almost the same size lol. But fun video
Best variator weights for 250 pound dude. Got a 50cc agility with a "100" cc big bore kit coming
I know this video is a bit old already, but a BBK wont always raise your top speed. You might get a few but the increase is negligible. The increase in power is due to the increase in torque so it’ll get you to the powerband or to top speed a lot faster.
I stopped using exhaust studs. On the qmb hex heads with M6x1.0x20mm in length with blue loctite does just fine
Great idea!
I actually did a big bore kit today aswell! The timing!
Heck yeah. How's it running for you??
@@throttle_therapy its running good, i got the original 12mm carb on currently jetted to 90. Feels alot faster with more torque, but swallows gas faster than i can drink water hahaha. Ive got a 21mm carb on the way.
@@theoneandonly1983 haha! Awesome. That new carb is gonna be a game changer
you need to use either all sliders or all rollers the sliders activate if you will faster than rollers
do i need to change my crankshaft and rod to put a big bore on my gilera runner 50cc?
in 1998 I got a brand new yamaha Aerox 50 2 stroke, changed the rollers and removed restrictors from exhaust, otherwise stock = 55mph, felt epic, I was 16.
Heck yeah! Do you have one now?
@@throttle_therapy no have a Honda 110 wave semi auto, great bike! in the 00s had Gilera runner 180 2stroke, the king! lol
The 2 strokes had plenty of power. I had a Yamaha ca50 (1986). Easily did 40mph. Unfortunately back then I knew nothing about engines and I never added oil. Funny thing though-looking back, I never remember the oil light on. The bike had a separate oil container and it automatically mixed the oil and fuel. Obviously, that’s what did it in.
Do you still use the same performance carb you have linked with this big bore setup?
Get an aftermarket exhaust something that has a larger opening to get it to rev higher
Love this channel would u do a topspeed run with it straight piped
Just put a 49mm kit in mine. Waiting for tools to finish up.
Did your Tao Tao test scooter have a stock bore and stroke from the factory ? It was assumed so on all your hop ups and speeds?
So what was you saying about jett in the carb for this big bore kit I didn’t see it I didn’t hear it didn’t do me no good moving on
Hey what did u torque your head bolts at
Bro you should done
1.valve pocket
2.Porting the
3.big valve
@throttle_therapy where so you source your parts or does everyone just get rolling wrench Denver parts
The big bore kit from rolling wrench is 90cc the same cc u bought off Amazon for $80 and it has the same results
Been watching for while now.
Picked up what I thought was a stock Chinese 50cc scooter. Exhaust was messed when I bought it for good price. Was loud and ran good.
Then it went up to 9000 rpm and did 60klm quite easy. Belt frade up and shut me down. Replaced it with new 729mm kevlar belt and cleaned everything in case up. No scale so roller weights unknown.
With new belt it had same speed but now it only hit 6500 when full throttle and doing 66klm. Top speed down hill has been 73.
Have scale and have replaced clutch with performance one that had red springs. Not as fast anymore. Put stock springs from old clutch in and weight rollers. They were 5.6g each.
Here is my concern.
What size piston in it. Has a bbk been put on.
Anyway to tell without removing valves and head to measure piston.
Carb comes off this weekend to get cleaned and rebuilt.
Dont want to buy new 80 or 100cc bbk if it has one in already.
The rollers are not stock weight so that got me thinkn
I put a 72cc big bore kit performance exhaust and belt upgrade and changed main jet can do about 75-80km on a flat road so long as there aint too much head wind. I doubt your bike has a big bore kit as you'd be doing well over 80kms. Im about to put a 100cc big bore kit in soon and upgrade clutch springs and change rollers. Hoping this will get me to to around 90kms/hr or a little more. Prior to installing the bbk I could only get around 60-65km on a 50cc.
Id recommend just going for the 100 cc kit straight up as youll probably find with the 80cc kit wont be fast enough. A little bit more work on the install but will be worth while.
Im a pretty heave guy too weigh around 110kg
That's awesome bro! Gonna need a lot of tuning though
Yeah! It has a long way to go lol but that just means more content!
you can 3D print a gasket using TPU filament
What's really fun is standing on the floorboard down hill and leaning and turning no hands
Sounds like fun and road rash lol
How many grams of flyball good for this type of motor
Was it fast enough. At 40. Minn. Flats?
How about the UP GEAR The right gear might get you 15 MPH more??
I got a super ninja zxr6 50cc…how do I make them faster?..
Is this bore kit compatible with Honda metropolitan?
Do I order the 64 valve or 69 valve cc kit ?
My stock 50 runs at 50mph so it seems mine should go pretty wuick
How much bigger can u go?
Anyone know if I can do this on a 2023 tnt Roma
Hey that's where I got my 90cc Big Bore Kit from I got it from Rolling wrench and it's a true 90cc is not 100 but it works so good on my bike I definitely check it out on my video if you want to see see it it's actually really cool
BBK can be done in an hour no problem but taking your time and being thorough is well worth an extra hour if your not doing this on a daily basis.
And being the perfectionist I am, there’s no way this is getting done in an hour 😂😂
Get the wider belt it will help tremendously
We will look into that!
I picked up about 5-7 mph by adding a windshield, 1/2 hour project 😅
Actually?
I have the same oneal helmet. Nice!
🤘🤘
You should have port and polished it before installing and you would have had a chance at 50mph
Official Outlaw riders.
So I’m installing the same 100cc cheap kit, I have a performance air filter and exhaust, what jet sizes should I use?
What size jet did you use
What kinda breather set up is that? I wanna find something like that to run on my 86 helix and get rid of the big ugly plastic box
Its the Nibbi intake tube from Amazon and a UNI pod filter. Works pretty good👍
I plan to get an air fuel ratio to tune mine when I get the bbk
Good idea! Would be sick to get a wideband on the scoot. More gauges more coolness lol
@@throttle_therapy definitely, and you'll be able to dial it in perfectly. I hear people lose a ton of mpg after they go bbk. That's wild since there are carburated 110cc bikes getting over 100mpg. I want to maintain the awesome fuel economy.
@@hybridorbital85 that's a great point! I am going to keep an eye out for a decent kit. That would be an interesting video to make
@@throttle_therapy absolutely! The guy from the 49ccscoot forum used one in a video but he didn't go over how to set it up or much about how to use it. Still informative.
I remember when you said you would not do a big bore kit because you wanted to push the 50cc
Put a windshield on it, I picked up 1-2mph just from less wind resistance
I agree. My stock 50 with performance variator and belt goes 46 mph with a 15”windshield. Going in the basement for the winter and getting a bbk for sure
You oughta do a video of you putting a 150cc engine into a 50cc moped. Just a suggestion for you
In the spring!! We will do this🤘
44 mph with all that tuning ? Feel like it should be way faster. maybe add a few teeth to the gearing since it looks like it has a lot of tourqe and add some different weights to you variator
I think the scooter had a kit on there alredy bcaus the original piston should be 39mm for the gy6 scooter
Totally possible! I did buy it from an old man tho… not sure he would have installed something like that but maybe he got it from someone who did
Pick up a 44mm crankshaft and add that to your bbk
Mine does 45 on flat with no bbk .the only thing I did was put 4 gram roller weights it's revs at about 8k rpm and I'm not stopping there
Mine did the same just took forever to get there. Now I get to 40 within seconds
@@grazz7865 with the bbk?
@@isaacwcash6394 with the bbk. Gets to top speed MUCH quicker but not really much more top speed than before. But I can keep up with traffic now.
@@grazz7865 I bought one comes in monday am excited ! also got some rollers with it too
@@isaacwcash6394 nice 👍. Take your time. Go over each step carefully to make sure you didn’t Miss anything. Some steps are a little tricky. But at the end of the day-well worth it! Let me know how it goes! Good luck!
about to install mine this weekend, doing 40-42 mph right now on straight and level, hoping for a big boost with those extra 30 ccs
How did it go?
@@wh3747 I’ll let you know, I gotta 50cc and I installed a performance exhaust and performance racing spark plug wire and cdi, my top speed is 40-45mph, I’m about to put a 100cc big bore kit on tomorrow
I did an 80cc kit and let me tell you-huge difference. My bike was like yours with the 50cc. 42-43 mph but a good 1/4 mile and a struggle to get there. Now I’m at 40 within seconds (maybe half a block)
" Good on you little guy " 😅
Hey i just put a 100cc bbk on my bike and have an upgraded carb and air filter on it and i was wondering what i could do to make it as fast as possible. i have 6g var. weights. what do you think i could do to make it faster? I have yellow clutch and contra springs that came w the bbk and was thinking of putting them in. what else do you think i could do? Thank you!
im thinking of doing a bbk. and getting different variator weights. im looking for more top speed but still wanna do decent on hills. im thinking of doing maybe a gram more then stock? maybe like 6.5-7g weights. let me know what you think and great vids!!
realized you answered my first question in a diff video and didn’t even see it. thank anyway!
If you do the bbk you will need a bigger carb anyway. In the scheme of things it's pretty cheap to do the whole kit. You will save money in the long run doing the kit right away instead of trying to get the same results without it. The bbk is definitely a must for uphill speed. Thanks! We appreciate that🤘
@@throttle_therapyOh okay. im new to workinf on stuff like this and i though i wouldn’t need a new carb. if i were to do a 100cc bbk would i need something like a 20mm carb? or bigger. thanks again for the answer!
Taylor Reyes-Vera yep, we did a 20mm carb with ours but you could probably go a bit bigger. We were going to look into running a carb off of a 150cc on ours.
@@throttle_therapy okay great thanks! and what about the exhaust and variator weights after the bbk ? any thoughts on what i should do with those ?
Taylor Reyes-Vera that stuff you might need to test a bit. We haven't dialed in our varitor weights yet. And I'd look on Amazon for an exhaust. We did a video on our exhaust set up. Its a bit loud and needed some modifications but it works. Hopefully that helps
So how are those tao scooters? I used to have a tao quad and it was the cheapest pos that only lasted for a week. I want to make a quick little scooter on the cheap and would love a Honda or a Yamaha but everyone for some reason wants scooters these days. Are these worth it or no?
They are fun for cheap! Easy to work on and from what I can tell they are reliable. Or save up and pay more for the Honda or Yamaha.
What main jet did you end up using?
Try a 92 main .
you have to break it in first or just go on a big downhill for a fast break in 🤪
anybody know what the model is of that scooter hes using is, I've got one just like it and ive been wondering
It’s a TaoTao Magic 50cc
Yeah that’s what I’ve heard, have you been able to find parts anywhere for that thing, it seems to be non existent on the internet
If you didnt change anything in the carburator, it might be running way too rich. Generally when you increase the amount of CC's, you should tighten the carburator jet. Depending on your climate you might want to install a 72-76.
I think you might be mistaken friend I think that you mean it'd be running too lean it'd be running perfect if it was the stock size bore if you're increasing the size of the bore and keeping the carburetor the same it would be leaning out the mixture rather than enriching it
@@joseph.seaker9082 Thats what i thought at first too. But mine was running waaaay to rich after the mod. I Googled around and it turned out that a greater CC will also incease the vacuum and that influences the feul ratio sucked in through the jet.
Wouldn't the larger bore require a larger jet. Also with the larger carb?
Unless you change the gears . Your just accelerating faster. Same top speed.
You already had a stock 65cc engine. Im a moped mechanic here in the Netherlands and the size of the stock gy6 piston here is 39mm. Of course the Laws here are diffrent, as we can only drive 25km/u (15.5 mph) without a helmet and 45km/u (28mph) with a helmet. I dont know How the laws are in your state. But i think you can drive faster there ;)
Oh thats awesome!! We can go way faster here! How strict are they if you break the rules there??
@@throttle_therapy they are very strict here, we have what we call a ‘rollerbank’ its a meter the police uses to test the speed. If the bike goes to fast you will get a ‘wachten op keuren’ or a WOK, that means you have to bring the bike to stock and have to do an insurance test. Otherwise, you are forbidden to drive the bike and it will get seized if they catch u
In the state of Maine they simply need to remain stock. No registration or title required,just need a drivers license. Law is very lenient here. 6,000 miles this year and one police interaction.
Depends on the state here. I'm in Virginia and we are legally restricted to 50cc and 35 mph top speed without a license/registration/ insurance.
I'm boring mine out from 50 to 100cc. Should 8 buy a new carb too????
Can you engine swap a 150cc into a 49cc scooter?
The 50cc is the short case. All others are long so extreme mods to do this
Old one was 43mm?? That's not stock. It should be 39mm. Hence the qmb139. 43mm is the 70cc piston. You should have recorded the weights of both before reassembly, curios what the difference was
Interesting... wonder if the old man we bough it from put that in? Pretty sure he was the original owner.
@@throttle_therapy I know in the UK there is sum with the 60cc engine but sold as 49cc
How has this kit held up over time? I have a 50cc I’m nickel and dimming parts with trying to squeeze a mph or two more as I go. I think this is the next step, maybe after a better muffler. Got the carb and cone filter, cvt you suggested, new cdi/plug, crankcase breather hose, got a new clutch coming this week.
It's held up well! Haven't had any issues yet luckily. If you have the budget, the big bore kit from Rolling Wrench is pretty cool! I want to get that next
@@throttle_therapy yeah, I was wondering about that myself, might be worth the extra few bucks. I like the idea of the bigger valves. Thanks for your videos man I love learning from others who are learning.
Your scooter was a 60cc 50cc ones had 39mm piston the 60cc had a 43mm they sold it as a 50cc.
Finally
Yeah check mine out I went almost 50 the last last video I did I did a lot of upgrades but check out mine if you want to get your bike like that
Does this work on all scooters?
no, its just for 50cc gy6 engines.
IHi What jet size are you using now mine is running 92.
I think I put a 90 in there
There are more of these engines than any other in the world. You can go just so fast. Once you keep pushing the foundation of the bike it is going to fracture. Nothing much you can do about it, Mikuni carb!
Wait a second. You pulled out a 43 mm piston stock? It didn't have a 39 mm?
Yeah! Somewhere in the comments, someone mentioned that we had a BBK already? Or a different version of a GY6? I can't remember for sure. Either way, It was bigger for some reason.
@@throttle_therapy yeah I just pulled the cylinder head off of my 2005 SunL and it also had a 43mm piston, but I got it used
Swap over to 150 intake and carb way bigger difference
Totally different job. The 50 mounts on top. The 150 mounts on the bottom. Definitely not an R&R job.
Huh?
@@grazz7865I am not talking about motor mounts
Put now 6 rollers of 6.5grams trust me and white big spring and 3white little springs on the cluch trust me bro
Okay good to know👍we can try that. what rpm are the white springs??
@@throttle_therapy they 1500+ rpm. They gonna be quick on start and top speed are the rollers the more grams the more top speed
@@throttle_therapy for 50cc/80cc best are 6 grams 6.5grams and 7grams max
@@throttle_therapy and dont put more cc on that crankshaft this is totaly fine with this 47mm piston
@@nenadbuggy2788 link for the springs and rollers?
Whats your purpose of having a scooter? Just for shits and giggles, trynna see how fast you can get it to go? personally i'm rocking enduro tires on my scooter and using it as a cheaper alternative to a dirtbike, and its registered so i can ride it on the road!
i did it in like max 4 hours
That's pretty good! How do you like it compared to stock?
After about 700 miles it'll get faster and run better
It's already starting to feel better every day!
To think it be cheaper just to buy a 150 scooter with all the upgrades on a 50 cc you sell the 50 for like 1200 and the money you spent on the upgrades you could just buy a 150 lol
Thtas kind of slow, i had one doing 55mph on a stock muffler
Stock 50cc gilera runner derestricted is a rocket compared to this scooter.😂
first :)
🤘🤘
how are these Chinese scooters so trash in America
my Chinese scooter goes 45+mph stock and it isn't even the most expensive Chinese scooter
it was 1250$
That's a useless and weak kit if you ask me.