How to install a big bore kit GY6 171cc / 172cc (61mm). EVERYTHING YOU NEED TO KNOW!

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Valve lash .004-.005
If you are a newby and have no idea how to install a big bore kit on your GY6. No problem. this " how to install a big bore kit" video will walk you through the entire thing. No special tools needed! If you find this video helpful and want to support us please join our patrion page!

[@stevebiggs1822]

I don’t even have a gy6 engine but still found it fascinating

[@RollingWrench]

P E R F E C T !

[@marvinmatsane7629]

It is better you don't have the gy6 engine while I don't even have a ruckus at all but I still find it interesting 😀

[@EsefDubs]

Same, but I’m tryna get one as soon as I have a garage

[@lienchen12]

This is a really good tutorial because you have a clear and step by step tutorial, I subcribe! Hit the bell and thumbs up..thank you

[@yewwtooob]

25:25 setting valve lash. You go on the bottom side (.004 to .005 and you pick .004) . Only thing is that as valve and seat wear( in a hot combustion chamber) the oil splashed cam and rockers wear less. This almost always ends up in valves that don't seat completely, which is accelerated by valve erosion and ALWAYS pronounced on the exhaust valve due to coefficient of thermal expansion differences based on heat/cooling cycles. Exhaust valve is only cooled from oil and seated contact (heat transfer). Intake is cooled by both those but mainly by cold fuel intake (reason carbs "ice up" is evaporation) in relation to relevant heat within the combustion chamber. If in doubt, ALWAYS set valve lash loose. Especially on the exhaust. They Will wear in and close the gap, so to speak.

[@stuartcairns427]

Spot on vid m8 deffo the best one I’ve seen and thanks for the info was just about to fit my m8s big bore 👍🏻

[@freestyleskyline]

I love how straight forward this is. I think I'm going to be buying a lot more scooters so I can teach my kid and learn myself

[@juliodiaz4493]

Man and you look, you can look at it all you want at the end of the day. You gotta do it yourself.

[@synoptic1047]

Thanks for this like big time. I can’t find anyone to do my work, so I must learn.

[@ipaddy]

this is the perfect how to video for the GY6 motor I have just done this build with a 180cc motor 63mm piston looks just the same except over here in the UK on our scomadi version of the Gy6 out motor hanging mounts are underneath compared to your top version and we have a disk back brake

[@MrJoe11young]

Great video! I just bought a Hammerhead buggy with the 150cc GY6. Thanks for the info.

[@SlowStang951]

Did you ever do the upgrade?

[@oldwortex5818]

Thank you. Our 150 is just tired of the abuse my son did on it, so instead of buying a new engine, I decided to rebuild with a big bore kit. This is the exactly the video I was looking for. I will add the performance cam, larger carb (28mm or 30mm) and i hope this thing will fly :-)

[@ElPatronGamefarm]

Have you done the build yet?

[@FranklinHicks-qs4gs]

How'd the build turn out

[@SippiDeals]

How did it turn out?

[@youtubeuniversity6589]

I love love love the gy6 out of all the engines to tear down to every last bolt the gy6 comes apart so nice and goes back nice easy to work on bullet proof and many many mods I love rolling wrench

[@ab_customz_llc]

As many others have already stated, great job! I just had to jump on the long list of others that appreciate your great content! Sub'd

[@deenie57]

C500cc mopead

[@brodjohn5993]

Because of your fully explanation I subscribed thank you hope more video regarding rebuild of GY6 150 motors

[@basmu7067]

Just put a Mikuni carb in but popped the head gasket in the process when starting it up, ordering y’all drop in kit Friday I’m hyped

[@RollingWrench]

Hell yaaa! You will love it!!

[@awesomebrian4835]

The oil breather u have look like it have a dipstick with it too do you seek that whole thing exactly like the one on the video ??

[@PakmanR3]

awesome video man, thanks for putting this up.

[@antonionavas825]

Thanks for the great video, lots of detail and well explain. I'm replacing the cylinder head on an old Lance Venice inherited from a friend and discover the old piston lost some fragments into the crank case. Any suggestions on how to clean this out or make sure there is nothing left inside that may create a problem ? Also I have no specs regarding nuts torque. what would you advice. Thanks!

[@psyolent.]

awesome build video dude. super informative and detailed mate.

[@RollingWrench]

Thanks for the kind words! I appreciate the support 💯🙏🏻

[@JamNJ1985]

Is there a way to get more power out of the stock ruckus without adding a gy6. I know a lot of people like the stretched look but I prefer the stock length of the rear.

[@themast8rsdzn944]

Hello i have an aprilia rx50 (2017 ) (distrangulated) and an honda crf450rx but im Racing enduro ON my 50cc , how can i give more power to my 50cc

[@fitzgeraldbernardbarnettcl7484]

Hai, you are very expert about scooter especially, i need a tips from you, i have a modenas elit 150 scooter, how to make it powerful than nw?... What do i need to change to?

[@raulgalera8990]

if I replace my air filter with a power air filter where should I place the crankcase ventilation? Its for an yamaha zuma

[@MarjanSpasevski]

0.04 is to tight clearance for air cooled engine, u need to put 0.10,when its get to working temp, tht clearance is 0.05, and u nvr gonna burn your valves,just my opinion, cause i have 170 cc gy5,157qmj block and its going 115kph tht would be 71 miles per hour btw good tutorial

[@RollingWrench]

I appreciate the support 🙏. All the details in this video is what’s worked best for me in my 18 years of experience.🤘🏻👍🏻

[@MrSquire2010]

do you have a vid showing how to split and change out the crank

[@unfuddled1889]

Can i apply this to my baotian classic? it has a gy6 engine and is from 2007 or 2009. Does this kit then work?

[@s0972821]

I am a Taiwanese. I just installed a 61mm cylinder on my 26year old 125cc GY6 scooter. It becomes young again！

[@RollingWrench]

Perfect! Did you use Taida?

[@donpoole8617]

Outstanding! Step by step.

[@PaumotoRacing]

AWESOME TUTORIAL !!! From Philippines

[@loydonnrodriguez5275]

tara mga nka 150/pwede pla hanggang 171 panu kaya intake at exaust pwede parin kaya stock carb at pipe?

[@coltansmoak6977]

you have some great build videos though. tons of good information.

[@jayroyt.4444]

Perfect video 👍

[@Mr.Run-n-Gun]

Nice tutorial. Very helpful.

[@seishiro7000]

Have some experiene with motors but man , still learned someting new, great tutorial, thx!

[@FreakinKatGaming]

Like seriously, I'm a mazdaspeed 3 owner, lost my engine... wel actually my car was stolen not long ago, anyways, over the years of learning about my engine, seeing this video I swear is like perfect for people who want to know a how their engines work and get an idea what pistons are like and how to work them as well as well long story short this videos good for anyone interested in their engines! Extremely versatile video just instead of 1 piston just add your piston count and rinse and repeat the process and just like the rings, 1 is 1 way the next one is opposite and so on and so forth, it's like a seesaw one up one down

[@stoneheartjp13]

Does all a cases fit the 61mm bbk without boring the case? I have a 125cc gy6 stock and planning on upgrading it to the biggest bore possible without touching the case. Most say 58.5 is the limit without boring the case. So if this kit is bolt on i will surely go with this.

[@asteriobagunas7237]

thanks for sharing., my question the same guage 004 intake ang ex or going to muffler?

[@murderothica]

Hi, i juz have a quick question. Does this setting can be implemented into Scomadi TT125i model? Since my scooter r using ECU (injection).

[@Sebastian-je7lq]

Is there anything you have to do to the fuel system or to the carburetor to adjust for more fuel for this change in displacement

[@tristancotton9623]

Great video

[@proteusmacapagal1453]

sir its that okay to use stock camshaft without camshaft stopper plate?

[@Yakplanet_tv]

Hey with my cam lobes facing down. @22:07. My rocker arms HAS A LOT IF PLAY ROOM. SO I FLIPPED THEM. because I couldn't adjust the dowls on the valve. I have bug bore kit. With a-9. Cam. If I try to adjust the valve there's still like 1-1/2mm of play.

[@TwistedRRacinStaceyReeves]

Great information,thanks

[@camerong9175]

Do y'all make performance parts big bore kits for the cn250 roketa mc250

[@walangmagawatv08]

hi rollingwrench, I would like to ask if all 157QMJ engines (China), will fit the 61 mm big bore kit without modifying or boring the hole for cylinder wall? thanks.

[@Smodlee]

How come I’m not getting any compression?? I gapped the rings all offset from each other and the IN mark facing the carburetor side. I can feel air coming out the exhaust port and my hand is getting sucked in on the intake but when I put my finger into the plug hole I’m not getting any compression so what am I doing wrong?

[@Vicmot]

Can you use 125cc Gy6 cylinder head on 180cc Gy6 cylinder? Whats the intake and out take diameters? - But you just mentioned smaller cylinder head adds to compression = power output. But how about those intake and out take holes? How much they matters for power output when using the default 125 cc carburator?

[@protofreak9518]

Where did you get the crankcase breather/dipstick combo you don’t sell them just breathers

[@firstnamelastname4722]

Hi I have a BN152QMI engine what's the max I can go without milling the case ? I might look to buy the tool as I have 2 of these thanks

[@just4kicks950]

Hello my friend ✌ I should get a good power hike with the 171 big bore using my stock head , because the motor has less then 100 miles/ what due you recommend on carb in mm & what # cam, looking for a decent gain with dependability & pricing . Appreciate the info thank you

[@caambata]

would there be a change with the carb or jettings using 61mm block? I heard you can run stock 150cc carb upto 59mm block only. beyond that, jettings should be changed.

[@traviswilliams6025]

I have a Titan 150, will this kit fit my case without me having to mill?

[@ragemotorsports4727]

Quick question.. I have the 157qmj motor on my buggy...what is the difference from the same motor on a scooter? Cause the item description says If installing on a buggy or sxs they don't guarantee fitment. just curious.

[@berke1572]

Where did you buy that oil dip stick thing, with the air thingy.

[@bryanbabcock5034]

I have a big bore 171 Dongfang. Would swapping the stock out for this make any difference? Thanks!

[@Tapsr]

Also on the piston should I order cast or forged? Thank you for all info

[@chrisatwork87]

Very good Informations :-) i install a 160ccm on my Kymco super 8 GY6... greets from germany...

[@MaDcOw1986]

Would this 61mm kit ran ok with a stock GY6 125cc cams and stock carburetor? Or do I still have to rejet the stock carburetor?

[@labluediamond]

I want to do some upgrade on my trike I wonder if all these videos work on it cuz my Motor is spitting out oil from somewhere its not over fill with oil cuz I had did TBE oil change already so any help here

[@AdenSallaberry]

I have a water-cooled Gy6 thats fits into a Surfango surfboard. Could I do a big bore on that. The motor is 150cc and it is hard to find parts for the watercooled version.

[@adamtolley5739]

Hi I have a gy6 125 cc with engine number of hd 1p52qmi do I still need to measure the stud spacing or will it be the 57mm spacing and if it is the 57mm spacing can I put a 150cc top end kit on it to make it 150 cc

[@panchobello7408]

Hello. great and detailed video. Can you please leave the link to buy the long gy6 engine with the 171cc kit and carburetor already installed, that is, ready and tested to mount on my scooter, just make the connections and start?

[@cn9936]

Hi there, I’m installing this kit in my gy6 soon. Do you recommend the gasket sealant sprays? Thanks

[@rayrojas8883]

The hose that is hang down? my gy6 had it and it ripped off im tryna find out what it is and what do i attach it to

[@psychouki]

So you can use a 150cc head on a 171cc cylinder?? Reason I ask if because I've stripped out my spark plug hole and I'm trying to helicoil it now but I would much rather replace head in the end.

[@hydrapond]

That's a great video. Thanks a lot. I learned to many things and feel appreciated.

[@RollingWrench]

I really appreciate the kind words 🙏🏻💯

[@topjj8283]

How can I get a phone number to get in contact with you?

[@frankryan6405]

Great vid mate you explain everything thing in detail. It looks like you don't need to re jet the carb is that right?

[@littlereptilian7580]

Nice to work with new engines

[@depdep229]

Hi I want to make it for 125cc, but the engine is injection, what adjustment is needed for this? thanks.

[@cn9936]

Hello sir, I’m installing the Taida brand 61 mm big bore kit like yours and an A12 camshaft. I’m thinking of upgrading to a CVK 30mm carburetor and intake but the intake port on the head is 28mm wide. Is that ok or should I go with a 28mm carburetor? What do you recommend? Thanks

[@breezysmith4800]

I have a 150cc Advenger stark scooter. I want to be a lil faster and stronger... can i get this same set up fr my bike.. need to know asap

[@jacobdenham4800]

Just purchased the 171big bore just and two valve performance head, also throwing in the A9 cam can't wait to see my scoot fly

[@RollingWrench]

Heck ya dude!!! That will wake it up for sure!!!! Thanks for the support 🙏

[@jacobdenham4800]

@@RollingWrench anytime great content and services going to do a custom build on a Chinese scooter a naked frame with custom mounts for everything all plastics are being removed now!

[@joolsfreeman4359]

Excellent clear and concise instruction, well done, i can tackle my gy6 top end rebuild with much more confidence, thankyou.

[@ariesclark3272]

i know Im randomly asking but does anybody know a method to log back into an instagram account? I was dumb lost the login password. I love any tricks you can give me!

[@gibsoncurtis8815]

@Aries Clark instablaster :)

[@ariesclark3272]

@Gibson Curtis i really appreciate your reply. I got to the site thru google and I'm trying it out atm. I see it takes quite some time so I will reply here later when my account password hopefully is recovered.

[@ariesclark3272]

@Gibson Curtis it did the trick and I actually got access to my account again. I am so happy:D Thanks so much, you saved my account!

[@gibsoncurtis8815]

@Aries Clark Happy to help :)

[@edwinator46]

I plan to convert from 125cc to this. Do I need bigger exhaust? And what about carb? Bigger jets?

[@King-Kings103]

Can a GY6 motor, an rear tire be placed on the Dong Fang 200cc

[@jasandoval7734]

Desde colombia te mando un abrazo aunque no entiendo tu idioma entendí el tutorial a la perfección muy bien explicado te felicito Muy bueno

[@jamesbalsley6135]

i need that oil decompression kit, where do you find one that is dipstick compatable???

[@ramranch887]

hey so I have a 1p57qmj,really having troubles with finding a rebuild kit...its started spewing oil out of the exhaust..do you have the parts for the 1p version?

[@jimsy5530]

I've always wondered what the little rubber hoses hanging off the little modified 125cc scooters in Taiwan were: your breather tube just answered my curiosity!

[@tebibyte2357]

U mean under the carb? If so that is the overflow valve, gas May leak out if it if gas is overflowing into the carburetor. It's a safety feature so ur carb isn't destroyed.

[@dagobertoarburola635]

Is it good performance just by changing the cylinder? Isn't it necessary to change the carb too?

[@jdsstegman]

Did you check the ring end gap?

[@NJFlash]

Great Video thx

[@jmac7272]

That was the single greatest tutorial video I have ever seen. Can you do my gy6 atk 150c buggy tao tao? To slow

[@RollingWrench]

Thanks man! Ya you can do a big bore kit on that

[@mohamadnurhassanrazalikami5178]

I got 125cc and try to upgrade to 150cc. But the piston shaft size is bigger. And i wonder do the piston shaft size are different at any level of upgrade?

[@dennispasadilla]

very clean 🤩

[@jameseldridge673]

Sir, I have a Tao Tao 150. What would you charge to build one of these, with an aggressive trans?

[@luisreinoso9512]

Very good video men...

[@Interesting_Drug]

Does this just drop in to a 125cc GY6 EFI euro5 engine (2020 lexmoto chinese scooter)?

[@user-nw7mr8ib3d]

I recently bought a 2020 150cc ice bear q6 trike, don't know nothing about this Brand n I cant find no reviews about it. Are they any good? Are they able to keep up hours of stop n go n Long drive as well? Can I upgrade modified it? What issues do I need to look out for, what to I need to replace if anything. Any info will b great plus I'm a 300 lbs dude any help will work plus I'm new to this world of scooters.

[@wcampfield8191]

Hey guys and girls, I have a 100cc bore kit but I need to know what size main jet, and what size point jet to put in my carburetor. Please help me.

[@shaunaromine3709]

And the black hose at the top of the cover? You touched it and moved it a few times, but nothing about what it is for or where it goes. Would you mind explaining that one?

[@yewwtooob]

Well done. Subbed

[@kingcash9160]

Ok if I get the kit then get the head how many cc would it be then if I got the head with it

[@blooddogbloodwork2435]

What is the biggest bore kit that I can put on a 157QMJ 150CC GY6 without having to bore the case ? Do you sell them ?

[@serkanturunc6721]

Hi, which the Best camshaft for 58.5mm cylinder kit? A9 or a12? Thanks

[@imaginewagons1060]

My friend has a gy6 with the EGR tube, but my motor is also gy6 with no EGR valve what’s the difference in our motors? And can I use this big bore kit on mine with no EGR up front? Helllllp

[@kenm.6307]

Anyone know where I can find a replacement shroud gasket/seal? I cant find one for the life of me.. any help is appreciated. Love this channel

[@caambata]

What's the name of the oil vent/cooler adapter(blue)? Tried looking at your website but can't find one.

[@turtleperks6909]

Is it possible to put a 150cc into a 2019 ice bear mini max, currently has 49cc

[@littlereptilian7580]

Wouldnt the too hight CR destroy the crankshaft or the connecting rod?

[@euroimports05]

my question to u is which big bore did install that u didnt have to bore the case ? what brand ?

[@SergioTerol]

You make it look very simple. Im saving up for a second bike, it will be a gy6 scooter. In the meantime i wanted to ask, would your EFI plug and play kit work on a geared bike? It has a 26mm intake is a 125cc... but what i am worried about is: will the EFI handle the constant changes in the throttle or is it made specially for scooters where you dont play that much with the throttle?

[@RollingWrench]

Thanks for watching. Our efi kit will work in any bike up to 1000cc. We do have DIY EFI kit out now :-) www.rollingwrenchdenver.com/products/diy-rolling-wrench-fuel-injection-kit

[@danielmoore394]

Can you find out if you have an a or B motor from the letters on the block