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.
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 :-)
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.
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
Friend, I congratulate you, good video you explain everything very well, few videos of such good quality you can find and your video is the best I've seen in terms of mechanics, I have a buggy with 150 cc engine. By making this modification do you know how many hp I can increase? And finally, if I make this modification, will I have to change something in the carburetor? and you recommend some spark plug coil with more voltage? There will be a high voltage coil on the market for this 150 cc engine.? Thank you very much and again I congratulate you for your video, in fact you explain very well and the quality in hd is very well appreciated all the details. Greetings.
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!
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
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?
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?
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?
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.
@@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!
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.
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
You can tell by the engine model number engrave on the lower part of the crankcase near the side oil drain bolt. If it says 125QMI", "157QMJ", "1P57QMJ" those are 54mm stud spacing A block (case). If it says "161QMK", "161QML" you guess it those are B Block 57mm stud spacing.
fishsticks A-block is considered 54mm stud spacing normally 125cc "QMI" , 150cc "QMJ" and both can upgrade upto 171cc engine without boring. Now, B-Block is considered 57mm stud spacing commonly use for 180cc upto 232cc engine if you want to know how to decipher more gy6 engine code checkout ncystore.com/blog/gy6-engine-code
NCY STORE So you reckon my p152qmi engine I can fit the 170cc kit without boring case? But those cheap china $40 170CC won't fit because of the jugs walls? But you kit does? Right?
fishsticks yes, NCY and Taida are only one that makes the bolt-on bore kit. What makes it a bolt-on is there cylinder skirt aka sleeve diameter is less than 63mm closer to 62.7mm or 62.9mm diameter to be able to slide in most A-case bore opening on crankcase is 63mm opening and Rolling Wrench should have them.
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.
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?
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.
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
@@jod5659 i have a Honda lead 110cc for sale apparently does 75mph. Previous owner messaged me as he had put the bigger head on. £200 for whole bike. Spares repair
just a hypothetical question: can the new head be installed with the engined mounted to the bike "in situ"? Or must you remove the entire engine to be successful?
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
Hey bubba. Love your video. I got to 18:58 where im installing the jug. And it dosent slide in to the case. I decided to smoke a cigar and drink a tall boy about it. But, i dont know what to do.
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
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
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?
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
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.
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.
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.
Yes,the cylinder is the same as well as the piston and rings,the timing chain has the same number of links.The only difference is in the head..The aluminun where the camshaft sits is like 1.5 mm higher,off the top of my head so.it means it will not accomodate a camshaft with bigger lobes..off the top of my head i would say it takes a camshaft A8 or A9 but not higher,cause of the height..you can use a regular head to replace the original head..and make sure your chain tensioner compensate for the chain slack..I have seen after market chain tensioners that sell as being good for 125 cc and 150 cc and the stem is a little shorter.Hope this helps.There is a lot of missinformation about this on the internet includung forums by guys who pretend to know and in fact they know nothing.The 157 qmj and 1p57qmj are identical gy6 engines..
![GY6 ENGINE BUILD [Everything you need to know]](http://i.ytimg.com/vi/wC5tYKqq0-0/mqdefault.jpg)
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
Man and you look, you can look at it all you want at the end of the day. You gotta do it yourself.
I don’t even have a gy6 engine but still found it fascinating
P E R F E C T !
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 😀
Same, but I’m tryna get one as soon as I have a garage
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.
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 :-)
Have you done the build yet?
How'd the build turn out
How did it turn out?
Thanks for this like big time. I can’t find anyone to do my work, so I must learn.
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
Hell yaaa! You will love it!!
I am a Taiwanese. I just installed a 61mm cylinder on my 26year old 125cc GY6 scooter. It becomes young again！
Perfect! Did you use Taida?
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
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.
I want to buy that breather but i do not see it on your website...Help
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
Because of your fully explanation I subscribed thank you hope more video regarding rebuild of GY6 150 motors
Where did you get the crankcase breather/dipstick combo you don’t sell them just breathers
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 ??
I would love to learn how to do this
I’ve been to Denver a dozen times
It would be awesome to meet you
Friend, I congratulate you, good video you explain everything very well, few videos of such good quality you can find and your video is the best I've seen in terms of mechanics, I have a buggy with 150 cc engine. By making this modification do you know how many hp I can increase? And finally, if I make this modification, will I have to change something in the carburetor? and you recommend some spark plug coil with more voltage? There will be a high voltage coil on the market for this 150 cc engine.?
Thank you very much and again I congratulate you for your video, in fact you explain very well and the quality in hd is very well appreciated all the details. Greetings.
every engine is different.
Definitely
you should make some videos about 200cc or 250cc or 300cc mopeds/scooters
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!
Where did you buy that oil dip stick thing, with the air thingy.
Did you check the ring end gap?
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
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?
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
C500cc mopead
Also on the piston should I order cast or forged? Thank you for all info
do you have a vid showing how to split and change out the crank
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?
Hi I can use this kit on my x-pro 125cc thanks
Hello..61mm piston can fit original crankcase?
Have some experiene with motors but man , still learned someting new, great tutorial, thx!
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?
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.
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
Heck ya dude!!! That will wake it up for sure!!!! Thanks for the support 🙏
@@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!
Great video! I just bought a Hammerhead buggy with the 150cc GY6. Thanks for the info.
Did you ever do the upgrade?
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
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
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.
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
Thanks for putting up some great diy videos 👍 how can you tell if you have an A or a B case without opening it?
You can tell by the engine model number engrave on the lower part of the crankcase near the side oil drain bolt. If it says 125QMI", "157QMJ", "1P57QMJ" those are 54mm stud spacing A block (case). If it says "161QMK", "161QML" you guess it those are B Block 57mm stud spacing.
NCY STORE what about p152qmi or the 153qmi KDU engine
fishsticks A-block is considered 54mm stud spacing normally 125cc "QMI" , 150cc "QMJ" and both can upgrade upto 171cc engine without boring. Now, B-Block is considered 57mm stud spacing commonly use for 180cc upto 232cc engine if you want to know how to decipher more gy6 engine code checkout ncystore.com/blog/gy6-engine-code
NCY STORE
So you reckon my p152qmi engine I can fit the 170cc kit without boring case? But those cheap china $40 170CC won't fit because of the jugs walls? But you kit does?
Right?
fishsticks yes, NCY and Taida are only one that makes the bolt-on bore kit. What makes it a bolt-on is there cylinder skirt aka sleeve diameter is less than 63mm closer to 62.7mm or 62.9mm diameter to be able to slide in most A-case bore opening on crankcase is 63mm opening and Rolling Wrench should have them.
That was the single greatest tutorial video I have ever seen. Can you do my gy6 atk 150c buggy tao tao? To slow
Thanks man! Ya you can do a big bore kit on that
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.
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
Its looks like sym jet 14 200i euro 4 engine right? Is it the same engine?
It would be nice to know the before and after HP ratings torque also would be great...
Yes I agree. Unfortunately I don’t have a dyno.
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
Hi, which the Best camshaft for 58.5mm cylinder kit? A9 or a12? Thanks
Do the two top rings not have a top and bottom?
Great vid mate you explain everything thing in detail. It looks like you don't need to re jet the carb is that right?
Does the breather tube breathe or is it just a chamber to relieve pressure
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?
sir its that okay to use stock camshaft without camshaft stopper plate?
I just got a 4 seat go-kart for my kids that need motor/electrical work it has a gy6/clone I'm going to build it now
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.
Will 40 mm cvk carb work for this?
You made a boring tool for a drill!?!? That's so cool
Will these kits fit a royal alloy gt125
Is it good performance just by changing the cylinder?
Isn't it necessary to change the carb too?
Whats the bore type of tao tao lancer powersports 150cc? Is that a gy6 also thanks
Will this work in a Vader 125cc?
does this work with the pcx 150?
Will this kit work for a tao tao 150 quantum
Sir, I have a Tao Tao 150. What would you charge to build one of these, with an aggressive trans?
The breather on your site is much different. How do I get this setup?
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
Can you find out if you have an a or B motor from the letters on the block
you have some great build videos though. tons of good information.
Could this apply to a x18 pocket bike 50cc
Hello.
What is the biggest upgrade i can do on a 50cc gy6 engine without changing the conrod and big end?
Thankyou
That's what I want to know too what is the biggest big boy can I can put on a gy650 also did you ever get an answer I need to know also
@@jod5659 i think its about 110cc- a Honda Lead cyclinder head is the same i believe as a gy6
@@jod5659 i have a Honda lead 110cc for sale apparently does 75mph. Previous owner messaged me as he had put the bigger head on. £200 for whole bike. Spares repair
just a hypothetical question: can the new head be installed with the engined mounted to the bike "in situ"? Or must you remove the entire engine to be successful?
Sometimes yes and sometimes no. The fact that you ask that . Makes me think you should go ahead and remove your engine . Lol
Can you tell me what my stock engine size is? So I can do big bite kit upgrade.. I have Chinese engine stock 162qmk1
Wouldnt the too hight CR destroy the crankshaft or the connecting rod?
Will this kit work on the DN 150cc Baja go-kart motor?
can be used in 125 gy6 engine??
If we change the original bore, do we nee to change the carburator too?
No, you don’t need to. You can though
What piston ring gaps should i use on 61mm bore ?
I plan to convert from 125cc to this. Do I need bigger exhaust? And what about carb? Bigger jets?
Hi there, I’m installing this kit in my gy6 soon. Do you recommend the gasket sealant sprays? Thanks
Will it fit for a yn1p39qmb binlliter 49cc
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
I appreciate the support 🙏. All the details in this video is what’s worked best for me in my 18 years of experience.🤘🏻👍🏻
Hey bubba. Love your video.
I got to 18:58 where im installing the jug. And it dosent slide in to the case. I decided to smoke a cigar and drink a tall boy about it. But, i dont know what to do.
I removed the jug and re razored the gaskets of the case ID. No luck.
Half way thru cigar and tall boy, im thinking thermal expansion. Should i put jug in my freezer for a little?
Hi
I want to make it for 125cc, but the engine is injection, what adjustment is needed for this? thanks.
What's the name of the oil vent/cooler adapter(blue)? Tried looking at your website but can't find one.
Do y'all make performance parts big bore kits for the cn250 roketa mc250
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
is that compatible with the Honda Vario scooter in Asia / Honda click in manila
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
Are those breeders good for zongshen 229cc?
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?
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
does the 171cc kit require that we bore out the bottom end? or is it just a bolt on?
Bolt on
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.
i need that oil decompression kit, where do you find one that is dipstick compatable???
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.
125cc to 160cc big bore kit i need to change carb jets?
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.
Can a GY6 motor, an rear tire be placed on the Dong Fang 200cc
Where does that hose go that comes off the valve cover?
This kit affect realeabilty of engine?
Mine says 1p57qmj. Would this cylinder fit ?
Yes
It's a 150cc look for 61 mm big bore kits . You can go up to 61 mm without case boring. Making it a 171 cc.
Yes,the cylinder is the same as well as the piston and rings,the timing chain has the same number of links.The only difference is in the head..The aluminun where the camshaft sits is like 1.5 mm higher,off the top of my head so.it means it will not accomodate a camshaft with bigger lobes..off the top of my head i would say it takes a camshaft A8 or A9 but not higher,cause of the height..you can use a regular head to replace the original head..and make sure your chain tensioner compensate for the chain slack..I have seen after market chain tensioners that sell as being good for 125 cc and 150 cc and the stem is a little shorter.Hope this helps.There is a lot of missinformation about this on the internet includung forums by guys who pretend to know and in fact they know nothing.The 157 qmj and 1p57qmj are identical gy6 engines..
Big Em..you are right,the biggest you can go without boring the case is 61 mm
Some of the 61mm kits have thicker sleeves so you still have to bore. . Just be sure you get a drop in kit
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
How do u keep ur scooter carb from booging down
Is the TDC mark on your lighten flywheel as well?? I didn't even think about looking when I installed it.
Yes :-)