INSTALLING A 171CC 61MM BIG BORE ON YOUR GY6 W/ TORQUE SPECS

[@rucknut2565]

The Ruck Shop rules!! Great video! I installed the same NCY 171cc Big Bore Kit that I purchased from the Ruck Shop for a great price! This video was an excellent step by step guide for me to install my kit and it answered all of my questions. Much Thanks and appreciation to Ryan and Kevin for their professionalism.

[@billyclevenger2632]

They actually did ok. But whatever you do. Do more research. After literally hundreds I will never waste time trying to fight with the piston half crammed in the jug to install they were lucky they didn’t have trouble. Just load the piston start cylinder down studs then you only fight with the rings only. And the A12 cam is strictly a low end torque cam with a loss on the top end. And the lift is very close to stock just with a different center line. They did do fine. But definitely need more experience before giving instructions

[@kevinstearns4198]

anyone who's never done this before it aint shit i never did one either i watched videos over and over till i got it memorized. now its like makin coffee.

[@joshbrown4258]

Hey thanks guys I just got my 171 big bore kit in your video really helped me out? One thing I know that’s not n your video that you didn’t do that is I recommend is dropping a little bit of oil in the bottom of the cylinder body and then the top of the cylinder body and work the piston back-and-forth

[@youngallah6202]

Thank You for your Tutelage. Ilearned more on this one video than on all the videos I've watched, combined!! I have an 80cc engine that had the Spark plug tread got stripped on the bore, and I would lose compression, and the engine would stall and shut off at stops. I don't know why or how it happened. I need to remove and replace the Bore and was not sure if I could do it. Now I can safely say, that I can positively do it and be on the road in no time. Again, Thank You for the Video Keep them coming!!!!

[@chucklesy]

Thank you. I have purchased a super red 200cc from red fox and could not find any supporting documents for 1p61qmk engine. This helps a lot.

[@jasonontherez6668]

When doing this, please don't forget to put assembly lube on wrist pin, cams, lube cylinder before putting a dry piston in and running it up and down dry several times. On first crank up, its going to turn about 300-400 times before oil gets to piston and cam. Easier to install g-clip in on one side before pushing the wrist pin in too. As always, all your videos are very informative and educational. Thank you for telling everyone about the bolt size reference on torque specs. Also, I am assuming the since this is a complete kit, that the ring gaps have already been checked at factory?? Keep up the good work, will be ordering mine after Thanksgiving.

[@Theruckshop]

good practice. the rings are pre-gapped and we have checked the on 50 installs. assembly lube good point but remember your motor will smoke on start up till it burns off so hopefully people know this

[@darynbundy8657]

Do you have any videos on taotao gy6 150cc engine rebuild and complete wiring harness install? .. also if like to thank you for doing these and taking time to explain things. Most of the others go thru everything in fast forward which unless you have superman super speed , you'll never keep up

[@spillllz]

Great video, thanks guy's, The Ruck Shop is awesome!

[@bustedpresents]

Having a hell of a time getting the wrist pin installed. It seems like I need to press it in there with a tool. I’ve seen a lot of videos claiming you can just push it in with your finger. Maybe on a brand new engine.

[@jeffsack8951]

This is an old video. Did you put the silver piston ring first?

[@grrr3070]

Is it possible to bore the 152qmi case to fit an 65mm cylinder skirt?

[@AllLifethingschannelyt]

Tried this on a 50cc Scott millington Motorsports jiajue rocket scooter with 80cc big bore went threw two. Every 500 miles

[@eazykeymejorada714]

Hey guys one quick question can a stock Gy6 manifold can be twisted into the front cant it work is my Gy6 still runn

[@alianbarcelo6258]

Yes, it will work.

[@kranosriger3712]

guys is it safe cause the metal left on sides are pretty thin ,will it work good for daily use

[@toddc7450]

These videos are awesome guys! I really want to build one of these.

[@CloakMack]

Which big bore kit is that one? I noticed u didn’t have to bore the case

[@carlosg1165]

What kind of horse power from this big bored kit you get.171

[@Theruckshop]

Carlos Gomez since a scooter uses a CVT transmission HP numbers vary drastically. Typically we see 70-almost 80 mph we don’t have HP numbers because many customers want top speed numbers

[@Creatives-World]

@@Theruckshop you guys are doing this technical job so you must know the question this brother asked and i as well.

[@dkj4183]

Very interesting and thank you for such a professional demonstration. I have a 2016 SYM HD 200 Evo (171cc motor) now with 10k miles. My bike runs silky smooth and it still looks brand new as the day I rode it away off the dealer lot. So yes, I do change the oil at up to 600 mile intervals max. Maybe that's a bit over-the-top frequency but w/o an oil filter on the GY6 the oil does get very dark at about 600 miles or so. I do all the other fluid changes myself too. I let the pro scooter guy at my local shop (Seattle Scooter / Cycle Center, Pete) do the serious adjustments and stuff. I am not a gifted scooter tech. Question: Why are there two oil drain plugs on my GY6 171cc? One on each side down below? Also, should I continue to do a full oil drain removing both plugs for every oil change? Am I starving the engine when remove both plugs? Should I just do one side at a time? I'll stop rambling now. Thanks again for your professionalism. Dean Jackson Seattle

[@MiguelLopez-sj2ib]

He said FUUUUUUULKKK you

[@boccaccioboyer1140]

This video is absolutely amazing, all questions answered with visual proof. I don't have a Ruckus but looking forward to doing business with you guys for my 150cc Tao Tao engine upgrade. I was wondering if the process will be as easy (no boring) installing a 180cc?

[@Theruckshop]

its the same kit we would just do a 171cc a 180 is just a crank but we really do not see that much more difference with a 2.5 crank and you have to split the cases. not worth the gain for the amount of work in our opinion

[@Theruckshop]

sorry the 180cc is going to require boring of the case due to its 63mm piston. the crank is the same. i would recommend doing just the 171cc and make it simple. our 171cc gy6's down here are beating 180cc all day.

[@boccaccioboyer1140]

Thanks for getting back to me on this. I already have a 26 mm carb, would this be ideal for the 171, or would you recommend a 30 mm? Also what jetting (pilot and main) would you guys recommend for the 171?

[@Theruckshop]

i would say either a 28mm or 30mm and we usually start with a 115 main and 32 idle. air mixture screw all the way in then a half turn out. start with the c clip at the bottom and work your way up until you find the right setting for the carb.

[@boccaccioboyer1140]

Again thanks for the great advice! I was wondering if you could clear something else for me? I am getting a lot of confusion on whether to change my stock air filter box out (mine runs under the seat) for a so called performance filter (uni). Are people just having issue because they aren't up jetting the carb. or what?

[@cedriccorey8484]

Would this 171cc 61mm be bout the same power as a scooter to an buggy in acceleration and speed,or best to do a 63mm.

[@muhammadsajid2417]

i have suzuki lets 4 49cc plezz show in video how i can change his ring piston and timming set immideat thnx a lot regaurds

[@Theruckshop]

we only deal with the gy6 150cc and ruckus 49cc motors sorry

[@jermainebryson4792]

So this is a 170 bolt on kit without having to bore the case? If so ill purchase one now

[@Theruckshop]

Jermaine Bryson that's correct

[@jermainebryson4792]

Hell yes will be ordered shortly

[@danielprice688]

What kind of Is corporator would I get

[@eliersitoo0076]

hey how much you did the valvules

[@AllLifethingschannelyt]

A Honda rukus is liquid cooled as well probably would of handled a 80cc big bore on there 50cc better than mine

[@warrenclyde2467]

Watched your video then ordered the kit to find out that it was too large to fit the bore without boring out the case. Guess I need to get one they milled down to fit the 57.4 bore. But I did install an A15 for added torque. Before it was about 32MPH at the top of one hill and now it is closer to 40MPH BUT Starting up a hill without a few grand RPM is very slow...Cant get out of my driveway with out a good run at it. So ordered an A8 to maybe get a good start...With the 3 I will decide which works best in these hills...The standard would do about 52 top end...the A15 does about 56 but is slow getting there. The torque should get two of us up my hill...The standard would but now it is slower at the peak with just one rider...Odd

[@mandapalque]

Maybe you have one of the older GY6 150CC engines which the hole is smaller. Sad to read this.

[@kevinstearns4198]

dope ass torque wrench wow someone knows how to use one!!!!!!!!!!! cool

[@ricardomierz8467]

Kevin Stearns. It's good for when your quietly working in the dark.

[@billyclevenger2632]

I have on very similar. But you can’t be accurate just slamming it till it beeps. I promise those head studs have a half round to go before torqued. It hasn’t even pulled the spring out of the gasket yet when they never pulled slowly a second time or third? I have to stop watching. Very nice guy’s. They will probably do well I just wish they would study before giving instructions.

[@marco21falcon]

What does the a12 do vs the a9

[@dreyontefindlay8626]

More intake and exhaust, the higher the number the more intake and exhaust

[@chriss4365]

I replaced the gaskets on my 150cc and the inner gasket was leaking again at the bottom i took it apart and the gasket is properly seated what the heck happened and will it happen again? That inner case gasket was leaking on the top before when running the engine now the replacement gasket was leaking on the bottom.

[@nickcalkins8705]

Love to have a non egr valve cover like that.

[@abuelofm5]

No need to bore out the crankshaft?

[@deanweymouth7962]

What is better a9 cam or a12 cam I want lots of torque if that helps

[@bubaba8938]

Is there a millage limit on the cam chain,like after how many miles does it need to be replaced?

[@Creatives-World]

How much horse power increases after doing big bore. Whats the difference before and after. And how much RPM these engine gives

[@ferdiciburhan6807]

gy6 150cc valve tightening problem??

[@mandapalque]

This are great people. I have been in their store and they are amazing.

[@lpacheco06226]

thank you for this video. I will turn my50 to 100 at some point. this helps a lot.

[@DankUrbanBoss]

Amazing I appreciate you guys doing this video!

[@tobysuttles9559]

Bmo Dex

[@sethschroeder9490]

Is there a break in period for the rings and cam if you do both at the same time. Maybe I missed it ?

[@Theruckshop]

We don't think so I'm sure there are many computer jockeys that will argue but the owner used to own a motorcycles dealership and he says no.

[@Theruckshop]

Just change oil after 200 miles

[@GuitarGuys7299]

Is there a reason you didn't check the ring gaps first?

[@vamountainman2512]

I know this is from a while ago but to hopefully answer your question. From my experience, did you notice how they appeared a little loose on the piston pre install? When you go to slide the piston into cylinder you will need to squeeze the rings down just a tad to make it fit and as it seats into the cylinder it forces the rings into the correct gap

[@cjbrks1883]

Is this Honda motor compatible with the 157QMJ GY6 Chinese clone? As in could I buy one of these motors and replace the clone with it?

[@ejae1853]

Question? Is it possible to swap a stock 200cc scooter engine with a 90cc scooter engine? I am a beginner to scooters. I wanted to start to a lower phase before going with higher speed. If it is possible, where can I buy a 90cc engine from Honda or Kawasaki? I hope that someone could direct me to the right direction. Thanks in advance.

[@jemarmiranda4401]

here in the philippines some branded motorcycle owners discriminates us because we are using gy6 motorcycles, they always say that its cheap and its not durable....and some people bullies me on my youtube channel :D

[@johnsonlalsangzela2811]

Is their any bad effect on the crankshaft

[@Theruckshop]

no, we have been running this motor setup for over 5k miles and 4+ years and crank is fine

[@hoghuntrdogestyl]

Stupid question, but having a larger bore, wouldnt it require more oil in the block? After i installed the kit, I've got a ticking sound? Tripled checked all adjustments and specs, fresh oil change with 750ml 10w40 and everything is on point. Any ideas?

[@Theruckshop]

Salty One big bore does not mean more oil . If you have a bigger cam it will tick . Make sure your valves are adjusted and remember it's a fresh too end everything needs to seat.

[@Theruckshop]

what cc big bore? usually you use 9/10 of a liter of oil with the gy6 engines

[@claudio67362]

I put 850 ml when the engine is new like that,i have also gotten amazing results using a crankcase hose to release the crankcase pressure..

[@kevindhull6733]

Trim the inside circumference of the head gasket a little and see if that helps.

[@claudio67362]

I have noticed the torque on the head is really important,also take into account the thickness of the base gasket and the metal gasket,in case you like to spray it with copper spray or copper silicone...The valve lash clearance should also be considered..i guess as a general rule your intake could be 0.06 mm and the exhaust 0.08 mm..The ticking is hard to tell you from here..but make sure your valves are not making contact with the piston..The gy6 150 cc takes 850 ml when it is new,750 ml when changing the oil from there on...10 w 40 is fine,adding some stp oil treatment helps a lot..I have used it consistenly .Ranging from 25 ml to 110 ml depending on the temperature..If its cold use 25 ml to a quart of motor oil,or anywhere in between.Motor oils are deprived from Additives nowadays,that is why they are so cheap.And this is not coming from me but From the API engineers..Most of these gy6's have a metal alloy that needs oil in the SE,SF or SG API category,not SM or SL like most oils nowadays..You can be buying the same quality brand you bought for years getting great results,but if the bottle says API service SN you are over paying for it,,there is a lot of debate on this,but mostly because many are not up to date..The ZDDP is down by half or more in most motor oils..So be wise and try it for yourself,especially when breaking in your new engine..I have a gy6 150 cc chinese scooter,it is 4 years old and has 23000 miles on it.The smoothness is comparable to any japanese scooter and the performance as well..I make food deliveries and have been putting Literally 500 miles a week lately for the last 4 months for 3 to four hours non stop..and then 3 to 4 hours in the evening..I live in Florida and here is where you need to know this very well.Especially on an air cooled scooter..For a big bore kit i would recommend up jetting the main jet,and the pilot jet in case of harsh starts and back firing on deacceleration..A free flow muffler is a must,and the exhaust valve at least 0.08 mm if not 0.09 depending on the clicking..I installed a fan to cool the valve head and i put from 5 to 10 cc of Lucas fuel treatment per gallon in regular gas to neutralize the ethanol and raise the octane as well as keeping the carb,spark plug and valve seats clean.I recently removed the head of my 170 cc oil cooled head after 5 years of intense use including trips of up to 50 miles non stop on the high way and could not believe this engine looks ,not only clean but it works like when i bough it.i use the air box and it works perfect.i never have to clean my carbs,it is a great combination with the lucas added in gas..High octane gas also lacks more than 50 percent of additives nowadays...Adding 10 ml lucas to regular gas will work excellent..I hope this helps..I have had 28 motor vehicles,including scooters from 50 cc to 650..Suzuki burgman..A few years ago i rode my Suzuki burgman 400 from Palm Beach To NYC..and i can not wait to do it again,best ride of my lifetime..I am planning to ride across the U.S and Canada hopefully this coming summer..

[@billyjohnskinner138]

hey guys I wondered if you help me (going slightly mad!) so me and a friend have built the same kit on a znen 125 retro but now its hard to kick over, and will only turn when spark plug is out. we cant get the bike started at all! not with electric choke or the super tough kick start.

[@billyjohnskinner138]

its a gy6 gmi...171cc cylinder and head...

[@CyllinderGarageinc]

What the price IS?? Saludos de México CDMX

[@Theruckshop]

lo sentimos. No realizamos envíos a México. El motor pesa demasiado

[@keeskaas9578]

What's the blue shit in between your valve springs? Never seen that before.

[@Theruckshop]

assembly paint from the manufacturer.

[@crisballa1574]

The block/bore of gy6 150 can fit to rusi sc/scooter.china ?

[@glim6168]

How many miles do you do a "break in" when you change the cylinder?

[@Theruckshop]

typically 200 and then first oil change.

[@glim6168]

Thanks. Love the build. So badass.

[@5_twenty]

can i add one these to my 150cc quad? and if so what would you say top speed and hp gains? it maxs @ 31mph right now

[@kevinstearns4198]

go to other videos some of these wont answer. yea if its the same motor as the scooter motor.

[@theforestlizard223]

if i change the cilinder from 50 to 80 do i need too chance the head to ?

[@vincedenimarck6498]

Having Trouble with installing Muffler, is there 2 different size studs bolts ..?

[@Theruckshop]

vince denimarck yes there’s a 6mm and 8mm but if you got the exhaust from us it will work on both . Don’t tighten the header all the way . Install the header then the bracket bolt muffler to bracket loose and tighten header and muffler on bracket little by little each time till all 3 are tight

[@vincedenimarck6498]

OK I understand now, Thanks a Lot

[@614outbackboys9]

do I have to bore out casing for a 63mm big bore kit

[@Theruckshop]

yes you do, we have better luck with the 171cc, we have customers beating 180cc with the 171cc setups

[@BlueRidgeRider]

Did you gap the rings?

[@Theruckshop]

they come pre-gapped and we have checked like 50 times and they are always correct. Tiada ones the rings are installed

[@RedzicAnel]

When installing new big bore piston, should we also replace the head of the engine too? or can we stick with the old one (50 cc for example)

[@pauls466]

the valve's will be to small

[@barryreeves9191]

hi guys i have a sym 2020 fiddle 3 injection 125 engine type xs1p52qmi-3c will the 150 kit fit easily and will the injection compensate automatically also what about a small cam upgrade barry

[@Theruckshop]

No it will not work sorry

[@mycrazzzyworld2581]

Can I install this kit in TVS ntorq 125

[@ildeberto1]

Do you have to drain the oil out to have to do the big bore conversion?

[@mandapalque]

No. You don't need to drain the oil.

[@KubaWasp02]

Tell me one thing.. is this lottery or You can point out which engine will accept 170cc or 180cc without boring the case of the engine ? I have (not so popular, but nice retro looking) Zipp La Vissa 125 with GY6 JJ152QMI engine.. Can I put in Naraku 170cc big bore kit or this from the movie and it will be bolt on ? :) Thank You for answer

[@nickwhite9209]

Will that big bore kit work on the Chinese gy6 copy? the taotao 150????

[@Theruckshop]

yes

[@BIZMOTO]

how much for a complete 171 cc motor with ncy parts? with carb all installed

[@Theruckshop]

BIZ MOTO please email us and we will get you price . [e-mail] search 171cc and you will see motor cost with Taida parts to get idea it will be cheaper we can go over parts in email

[@CannondaleF700]

will this kit fit my 152qmi engine without boring casing out??

[@Theruckshop]

shauny17091987 yes it will fit . We only sell kits that require no boring that's why it's only a 61mm

[@user-neo71665]

Ok I got a stupid question. I have a kinroad buggy with a 150 in it. How do I tell what case it is? I see this kit is listed for A cases but this is my first gy6 and I have no clue what the differences are.

[@Theruckshop]

send us a pic of it at [e-mail] you can measure the head bolts once you take off the valve cover. should be 76.3mm diagonally.

[@mnuncio8793]

Is there a way to run the GY6 without the shroud?

[@Theruckshop]

its not recommended due to cooling from the fan goes to the cyl and head in that shroud. with it off the air there is stagnant when riding. an oil cooler is what we have seen people do with no plastics. as far as if it works good, that i do not know.

[@mnuncio8793]

So what am I looking for the mini radiator or something else

[@Theruckshop]

@@mnuncio8793 no these are air cooled not liquid cooled, you would need an oil cooler

[@alsehendo34]

Has anyone done this topend with the motor in the gy6

[@jcmfrancisco021]

I am installing a 155cc bbk and an A9 cam. do I need to replace my valve springs to a harder springs to reach a higher rpm?

[@Theruckshop]

nope stock ones are fine. the 155cc has nothing to do with hitting hight RPM. That is your weights and even then we have never seen anyone hit the rev limiter on a gy6

[@jcmfrancisco021]

The Ruck Shop thanks! cause I will be using my stock head (150cc)

[@Theruckshop]

you will be fine with a stock head

[@jcmfrancisco021]

The Ruck Shop Thank you very much! I already bought a harder springs because Im worrying to get a valve float if i am going too fast LoL. Im glad I asked this silly question :)

[@GYccUsefultips]

Why do you insist on getting higher R.P.M on an air cooled engine..That does not make sense...I use 16 g rollers..light contra spring...32 pilot jet and 105 main jet..make sure your spark plug is not white(Lean)...Adjust the air fuel mixture screw until the spark plug electrode is kindda brick color...i get 40 mph at 4000 rpm..and my engine is never hotter than 100 F even.in summer days...Add 10 ml of STP oil treatment in 10 W 40 motor oil and add a mixture of lucas gas treatment and 2 cycle marine oil..penzzoil is the one i use..the blended one..3 parts of lucas to 1 part of 2 cycle oil to lubricate the top ring..Add that mixture from 10 ml per gallon and increase up to 5 ml per gallon if needed..i usually add 2 to 3 ml to a gallon..87 octane is perfect...

[@ejb2184]

Can I use the stock 150cc head on the 171 piston and sleeve

[@Theruckshop]

yes it's a lot of compression though

[@johnrockefellers5883]

no need case boring? just swap it and that it ?

[@Theruckshop]

nope the NCY 61mm just drops right in . It's one of the few that do.

[@coreymcnair1]

does the kit come with a new valve head cover, or is that reused?

[@Theruckshop]

you re use your old valve cover

[@polayer4040]

Is the preformance gain very noticeable going from 150cc to 171? Is it worth doing this? I was just thinking of doing this to my son's utv and I am not sure if it's worth the trouble...please advise. Thanks

[@Theruckshop]

with the right tuning it provides significant torque and performance upgrade than the standard 150cc

[@massimoarletti3659]

Buona sera volevo divertirmi su un motore di un kimco agility 125, volevo cambiare albero motore gruppo termico 180cc albero a camme testa e carburatore, il tutto della Naraku, puoi consigliarmi?

[@LANAJ-sj7dc]

I have a 171cc with a 4 valve head what is the best carb that I need on this setup I have now the stock 24mm carb

[@Theruckshop]

probably the oko 30mm pwk carb. that 24mm with not work well for all that power.

[@LANAJ-sj7dc]

The Ruck Shop Thanks for the info here In the Netherlands I can't find the info that I need also I have a stock 125cc gy6 with original 24mm carb but this carb is damaged will a bigger Carb give me more power or should I buy a original 24mm carb? ?

[@dirtywrench]

I thought you had to machine the case half's if you you went bigger then 155cc kit

[@Theruckshop]

David Montoya nope you can go up to 61mm on ncy and Taida others the cylinder walls are too thick. These 2 companies make drop in .

[@hillsrod]

61mm stock stroke = 155ish ?

[@jordandenmark8443]

going to Austin, TX by chance?

[@Theruckshop]

we may have someone from the shop showing up there. hahahaha

[@jordandenmark8443]

I follow both channels I'm excited to see the build finished. This was a great how-to!

[@Theruckshop]

thank you we appreciate

[@dontringali6778]

Did you do any boring to the engine?

[@Theruckshop]

Don Tringali no both NCY and Taida 61mm are slip in on 99% of GY6 100% of our motors we sell though . We had 1 customer that had to more but maybe he didn’t loosen the 1 bolt on the case we don’t know

[@enesfazlic6017]

So what was the rocker box torque spec then?

[@Theruckshop]

m8 is 21 ft lbs oiled

[@Gokywildcats11]

How much does this kit cost for upgrad

[@Theruckshop]

It’s listed on our website

[@tootightconcepts747]

I was wondering can you go from a 50cc to a 171cc big bore kit without any machining can someone please let me know thanks

[@reggiexp69]

lol i think you can anwser that that your self... if you said 50cc to a 80cc or 100cc would be reasonable... but you can dream to get it to a 171cc lol buy a 150cc gy6 engine those cost 200€ will be cheaper then upgrading a 50cc to 171cc .. if that even is possible...

[@tootightconcepts747]

Thanks and knowing is half the battle 😎

[@atonyrodify]

Great video!question Do you do anythung with Hammerhead 150cc engine if so im looking for a top end unit for a (07 Hammerhead gt 200)

[@coltenchrisman8875]

Do I need stronger valve springs for an A12 cam?

[@billyclevenger2632]

You shouldn’t. It’s only for hills and pulls. The lift is pretty much stock with a different lobe center line. The A 9 is the top end cam. I’m not truly sure on it but it’s also mostly in just the center line. But it’s way more aggressive mid and top end.

[@jerh02official81]

Is this kit a drop in?

[@Theruckshop]

Yea it is

[@jerh02official81]

@@Theruckshop where can i buy it?

[@joeyiway321]

How much does 171CC 61MM BIG BORE cost and is it compatible with PGMF-I fuel system?

[@Theruckshop]

it will not work with that sorry

[@CannondaleF700]

if I buy a cheap €40 61mm big bore kit it won't fit unless I bore out ? but your kits just slot in yeah ??

[@Theruckshop]

That is correct because the cheap 61mm one have thick cylinder walls only the NCY and Taida are slip in cylinder kits they use thin cylinder walls for drop in

[@warrenalbert9336]

I saw two major mistakes here. On minute 23:35 where you tighten the heads, you said to torque to 7-11 foot lbs. This is totally wrong, it is suppose to be 20 ft lbs. At 7 your going to leak compression like hell. And you never tighten to full torque each nut or bold. You tighten them gradually to jot warp the head. Like if you go to 20 final, you go to about 10 each bolt, then do the same pattern to about 15 or 16, then finish the last time at 20. This way the head doe not warp and cause a leak of compression. And also the gap setting on both factory calls for .003 not .004 or .005 You don't go by bold size. You go by factory book specs.

[@Theruckshop]

Warren Albert no you are actually wrong we have build these motors and many are 3-4 years old with thousands of miles and it is based on bolt size and bolt material. And for reference we did use a GY6 manual for valve and bolt specs also you don’t want them too tight as the when they motor gets hot it will make valve get tighter . And these are GY6 Chinese motors so there’s no Factory spec book like a Honda . As far as loosing compression we have probably build more of these 171cc and other GY6 motors than you . Thank you for your input though .

[@ThePTATGMR]

Can I install a big bore kit in an 2003 Aprilia Rally 50?

[@Theruckshop]

The Wienpenn246FTW I'm sure if they make on but we only deal with the Honda ruckus and aprilia is a different motor we don't sell parts for the Aprilia

[@jjstewart2120]

You've been a great help .thanks very much.

[@theoldsquishypud1728]

Would this size work on a 49cc gy6 engine as an upgrade

[@Theruckshop]

joe McMillan no it will not only works on 150cc GY6

[@lucaserafini188]

The engine code are 152qmi or 157qmj?

[@GYccUsefultips]

157qmj is the 150 cc with a 57mm bore..the 152 is a 125 cc with a 52 mm bore

[@lucaserafini188]

@@GYccUsefultips thanks

[@abedshalhoub9320]

Very nice thank u for this video 👍

[@eliezercardona8339]

is that true that with the big kit they will run a little hot?

[@Theruckshop]

no its not true for the gy6 150cc. it may run hot if you run it lean, but we have guys riding these 171cc engines for hours and hours every day with no overheating issues. if it was the original ruckus 49cc then yes we see overheating issues when trying to put a big bore on those motors.

[@eliezercardona8339]

The Ruck Shop ok. thanks. I appreciate

[@Theruckshop]

you're welcome anytime.

[@techunfiltered6874]

Awesome stuff guys! Will this work on a 125CC or does it need to be 150CC specifically for this kit to work?

[@dnycemoebreadentertainment7065]

You have to bore out the kit to a 61mm are 63mm

[@GYccUsefultips]

You can install a 150 cc bbk on gy6 125 without any additional boring

[@potato4358]

You used stock Starter motor bro? Or not?

[@Theruckshop]

yes we used the stock starter

[@potato4358]

Thanks bro. Cuz they will set my suzuki skydrive 61mm block. And i dont have money to buy starter for higher cc.

[@b-wiser3636]

Nice video do you offer service??

[@Theruckshop]

Sorry we do not work on any scooters

[@tizanqueeley1275]

How much for that engine?

[@Theruckshop]

search 171cc on our website

[@calt1243]

Would this kit work on a 125?

[@Theruckshop]

MockaNi 126cc GY6 ? It should

[@rocketbunny2980]

@@Theruckshop without boreng the case???

[@juandelacruz2188]

You did not show in the video to torque the nuts and bolts

[@MagnusDominus1]

Squiggly one, is the oil control ring. The piece you were using the needle nose on at the piston was a wrist pin retainer. The piece that connects the piston to the connecting rod is the wrist pin.

[@Theruckshop]

yes we are aware, at the time of the video we just got off 12 hrs of working and wanted to make this to help customers understand. we were exhausted and didnt think about the correct terms for the parts would help them as much as physically showing them, considering if they are watching it then they will understand.

[@Cito_Fiytb_617]

Hello Ruck Shop ive bought alot of parts off yaull and I absolutely love it,great fast shipping also and thanks for the lollipops lmao 🤣🤣🤣 so its either ncy,or taida I think ill go with Taida $50 more will this give great power and should I buy titanium valve springs and stainless steel valves for better performance? I'm taking my time on this build over the winter and want to build the BEST motor possible thanks ahead guys

[@Theruckshop]

i would just save your money the valve springs are just coated not really titanium . And the Stainless steel valves are smaller than what is in the Taida head. so keep what is there

[@g35ridah]

Love Theruckshop

[@mandapalque]

BagMan FHO Representer I have been there about 4 times, they are Great people.