How to Install Big Bore Kit on 50cc Scooter - Every Step Included! 80cc or 100cc GY6 139QMB Engine

Purchase your Big Bore Kit from us at: rousemotorspor...
FREE SHIPPING on all orders above $20! We love our subscribers!
This is the most detailed Big Bore instructional video out there! We take you step by step on how to install an 80cc or 100cc big bore kit on your 50cc at home, without missing a step. In this video, we are working on a GY6 or 139QMB 50cc engine.
Check out our other videos to see how to determine what engine you have on your scoot.
Check Out the Playlist to See the Video by Chapter:
• 80cc or 100cc Big Bore...
This series is simply for entertainment purposes and we can not be held responsible for any injury or damage as a result from trying at home.

[@johngibson1491]

With 2 hands it's hard work and your over here installing everything with one hand wrenching and one holding your phone. Awesome brother.

[@edwinjiscoa5695]

I followed your step by step installation... Dude I hit 51 top speed...thank you so much....my scooter is so fast and super strong. ..you absolutely awesome dude!!!

[@richbenson430]

Did you use the stock head, or did you have to upgrade it? I bought the 52mm bore piston and jug, but the head is stock and too small (piston hits the head at TDC)

[@uncrustable9923]

@@richbenson430sounds like you installed it wrong

[@brianboyd8882]

I just wanted to say that you are greatly appreciated, I jus bought my first 80cc big bore kit and followed your steps. Like the other person said, you take the time to go over everything and not overconfident like the other people. I will most definitely be using this video as an reference.

[@keithrumbarger2465]

Excellent video. I watched this a few times and was able to install the big bore kit with no issues. Thanks for the information. Our trike moped went from being a turd to being able to go up hills without any problems. The big bore kit was the ticket and this video gave me all of the confidence that I needed to get the job done. Thanks again!

[@tylermeller7581]

What’s ur top speed

[@dendys04]

@@tylermeller7581 it will be around 70kmh to 80kmh

[@yogikaius1510]

Not sure if i've commented here in the past, but even if I have, I would like to reiterate my opinion on this video and the author of the commentary. This is the most comprehensible step-by-step installation of a Bore Kit on a qmb139 engine that i've come across. As you've also stated in the video, you've done this many times and get overconfident; however in other tutorials it seems as though they skim over tiny important details because of that overconfidence that you seem to explain very well. Crucial information for beginners and seasoned professionals alike. I used this video as a reference for installing my first Bore Kit, and she ran wonderfully. I will use this video for further kit installations. Thanks, Rouse Garage, for being so thorough and taking your time. Teaching is an art.

[@RouseGarage]

+Yogi Kaius Thank you for the kind words!!

[@cecileverone953]

Agree 100%!!!

[@ronathey5287]

@@cecileverone953 can you please tell me how 2 order the parts

[@djrivera2301]

@@ronathey5287 I ordered my 80cc Big Bore Kit from Amazon. I got it 2 days later, and the kit had everything needed to install for about $30 bucks.

[@seanmayo206]

Hey man. On my cam the top is past the edge of the head .why?

[@oshensview]

About to do one soon, 100cc, and I'm watching only your video. You're a good teacher and your voice isn't annoying like alot videos I watch

[@MostlyPosative-nj5ex]

Those kits aren’t actually a hundred cc’s. They’re less. That’s judging a marketing gimmick.

[@dalway1657]

This video saved my butt!!! I couldn't find ANY OTHER tutorial on youtube or else where. I've never worked on an engine before and had no idea how to even start. BUT, I played this vid a step at a time in the garage while I worked on my bike and everything went perfectly!!! I could not have installed my bore kit without this video, thank you so much for being so thorough and simple!! I installed an 80cc bore kit on a Dongfang DF50SST thanks to your vid!

[@jimerdmann4286]

I just want you to know I just finished rebuilding my scooter engine with the help of your video. I have never worked on a gas engine. With your video, it really went smooth. Thank you so very much for explaining ever step you took.

[@george102472]

2018 gator scooter 49cc I just installed big bore kit I watch your video about 3 times and I did it start it right up take off the emissions everything is good thanks alot

[@alfredoaldape9662]

how much faster did it go???

[@george102472]

47 to 50 it depends on the weight and the wind

[@dylanweise4802]

@@george102472 With scooters, weight doesn't really matter to a degree as they are designed to have the toque to carry different load... my mate is 190LB and I'm 250lb and there was zero difference on flat surfaces and hills

[@vulcandawg7623]

This is by far the most detailed and helpful rebuild walkthrough i've seen on youtube.

[@MotoMiles]

i agree i dropped my bike to a mechanic hes had my bike for a couple of weeks .. hes charging me a grand for a job i see kids and home garage mechs doing in 4-5 hours on youtube.

[@IosuamacaMhadaidh]

Check out 49cc scoot on KZbin or 49ccscoot.com online

[@joeyhotcakes8628]

I used your video to install my kit, Ive been running my it for about a year and its running fantastic, Thank you for your help!

[@suzannecouillard5312]

Excellent video. My only recommendations are to also use assembly lube on the camshaft to avoid a dry start, and avoid getting any sealer near any oil passages. If sealer makes its way into the oil system, it will ruin your day.

[@paulhyde4899]

just wanted to say thank you just installed a Big Bore Kit just like this and this video made it really easy

[@RouseGarage]

+Paul Hyde Thanks for watching!

[@codyregattieri]

did you add any performance up grades as well or just the bore kit and how much gains?

[@richardwendt9266]

You wouldn't be able to do a rebuild video for an XT600? Haha But seriously, good vid. I just installed a big bore kit on a 2 stroker. Had to freeze the gudgeon pin so it'd shrink, and even still it didn't want to go in. Nightmare...

[@myakkafuel9574]

Are a v dubber? I saw ur profile pic

[@genestutler9923]

@@RouseGarage I have installed a 100cc bore on a 2018 taotao vip. I had no spark at first thinking the timing was a little off. Played with that and got if running. Now it won't fire and the valves seem like no matter what I set them at. The seem to work their was extremely tight. Any ideas

[@dll8765]

I had already ordered a 100cc BBK, 20mm carb, perforamance cam from an online source and then discovered this video. Excellent vid. I have a 2009 Tomos Nitro 50 and the sleeve of the new jug wont fit in the crankcase. I need to get out my die grinder and make the bore hole larger to accept new jug. Wish me luck. Heads up to anyone before they start assembly.

[@locotrucker46]

Thanks so much Patrick for this video. with your help I was able to install a 100cc bbk on my son's 49cc scooter. This is my first time doing this but thanks to your video it went pretty smoothly and we finished it up this evening and after a couple minutes of starting it, it fired up.

[@badmonkey2222]

@Scott Dee without changing the gears 55 to 60 on flat surface which is plenty fast enough.

[@bradspeights6059]

Do you remember what parts place you got the 💯 cc from or does anyone know where I can get quality instead of cheap China. Gone through two heads on this Moped motor.

[@JA-fn7le]

I would have originally said go with rolling wrench, but with zero response to email info requests I'll DEFINITELY look elsewhere, if a business doesn't care enough to reply to emails then they dgara about customer service. UPDATE: Rolling Wrench is Just 2 people so response times may be extended.

[@seanking2954]

@@JA-fn7le rolling wrench is a joke ...they charge 8.99 to download a video on how to install a big bore kit

[@00tonytone]

The laws on these scooters are different in every city it seems. Union city NJ there towing them. Saying there not street legal.

[@jameshansen2569]

Thank u for this video. I installed an 80cc big bore kit on my taotao vip while watching ur video step by step. I am no mechanic but this detailed video gave me the confidence to do it and everything came out perfect!!!! 😁😁😁

[@motley_moto]

Awesome! Installed my kit with my computer nearby and this video on. The install went super smoothly and the bike fired up first try. Thank you for a great video!

[@jeffmee763]

Great job one thing I do is turn engine over by hand to make sure it's all free with no valves hitting the piston.

[@Smoothgxxh]

Thank you so much for the step by step it I ordered the board kit on Amazon for like 70 and I made sure watching your video the first three times that I had all the pieces I may be watched your video total of 8 times from beginning to end not skipping anything thank you so much I am the President of headless horseman bicycle and scooter Club thank you

[@randyroy7489]

Absolutely great step by step instruction, thank you!

[@Deoge4]

And I just know with your step by step video then I'll have no problem you're the best teacher that I've ever had shiny Apple for you😊

[@steveberube966]

Hey, I wanted to thank you greatly for posting this video! Definitely the most comprehensive set of instructions I have found. I just performed the steps on a Kymco 2023 super 8 50x. They were pretty much identical with the exception of the housing had one extra bolt. Otherwise, it was spot on. I ended up using a zip tie to keep the chain safe and one mistake I made was not pulling the chain far enough out when I was trying to push the assembly back together. So the chain got caught a little bit nothing happened, but, just caution for anyone else when they were putting everything back together. Again thank you very much for a fantastic guide!

[@steveberube966]

I also lubricated the cam before I put it in

[@garybloomlaw]

Great video. I would add to check the flywheel to make sure it's still at TDC (the "T" at the mark) before closing up the engine... It's not impossible for the flywheel to get turned/rotated while you're trying to get the rings and piston into the new cylinder. You should recheck it before lining up the camshaft and timing chain.

[@thatdcdude7434]

Thank you for going above and beyond to be sure we can see what you are doing every step of the way!! That is soooo rare in this type of instructional video...

[@7777R]

I have a 100cc big bore kit coming in this weekend and I’ll be using this video for each step. Thank you for all this detailed information.

[@kkaarriimm]

How did it go?

[@7777R]

@@kkaarriimm It went really smooth and it’s running great and so much quicker. Super excited about it

[@kkaarriimm]

@@7777R thanks for your reply I’m glad it worked out for you :) May I ask, was it possible to fit a 125cc or was it exactly for 100cc bore?

[@kkaarriimm]

I mean like the engine itself, can it take a bigger size cylinder?

[@montelmitchell9704]

This is the best video out here! Detailed oriented. The most comprehensive. Thank you for it rousegarage!

[@thomasdsmith7678]

Thanks for the vid. Install the studs by jam-nutting 2 nuts snugged together on the stud, then us a wrench to seat the studs. Un-jam and remove the nuts. Pliers will F-them up.

[@jamest.5001]

The rings, I have always put the gaps 180° from each other, I have seen others do 60° but that doesn't make sense to me, 180° always worked for me! And I always put them at 12 & 6 o'clock, I also like to polish the dome of the Piston, to help prevent carbon build up, and reflect heat a bit, possibly. It wouldn't hurt to slightly lighten the Piston, without weaken it!! I just done one of these, I ported the head and unshrouded the valves, went to a A9 cam, and 20mm carb, I'm about done, and ready to see how she do!

[@theamerican7080]

It doesn't get much better than this. Thanks for posting!

[@RouseGarage]

Thanks for watching!

[@stilltlrforlife]

Emery cloth and brake clean to take off a gasket, then of course an oil change before start up and a good trick is to grease the gasket for install except the head gasket, it will seal perfectly, and come off with no scraping next time you tear down if you have to.

[@benallen453]

Ordered the Rouse big bore kit. Everything went smooth, but there was an issue. After a couple of emails, issues resolved. If l'd ordered a similar kit from some generic supplier I don't know where l'd be. Thanks for all your help Patrick. I couldn't be happier and I'm look forward to doing business from no on!

[@RouseGarage]

Thank you Ben! So glad to have you as a viewer and customer!

[@steveblottenberger1097]

Steve from Annapolis Maryland you're doing a good job with the extension on your torque wrench will subtract it will not be inaccurate 12 foot pounds or whatever it was you said you got to subtract every so many inches because it reduces foot pounds of torque to the socket because of the extension

[@ericcarroll5055]

Patience is virtue I put a hundred cc Bore kit on mine last year and it is running very fast and perfect

[@jamesdacus7367]

wish i knew you lived close bc i feel you'd do the job with perfection

[@MikeRBB]

Thank you heeeaps for this. I followed step by step and she kicked over on 3rd kick. It did take me a bit longer than you however, about 3 hours, with my tea and a couple of ciders in between.

[@miguel360kmc]

I seen about 20 comments on the carb him just setting it aside... Do you really think this guy dont know it has to be tuned? Maybe he should have said something but this vid is on the installation of a Big Bore Kit not tuning a carb just the bbk i believe i seen a vid in his list about carbs. But as far as the vid amazing! I watched tons of vids i tried watching ones with "non mechanics" doing it since im not 1 and figured they would do it the way i would (i was right) but i also like a few full breakdown vids and this is the best one i seen the little extra stuff like adding Lube to the Piston which makes perfect sense but never seen or heard it before. And using a tiny bit of gasket maker shit like that is great. 👍 good job and thank you. Dont worry you cant make everyone happy just know you helped a new scoot tuner out a lot!

[@rjuarez4913]

If I hadn’t had this video I would have made many mistakes, and I’m somewhat mechanically inclined. Thank you so much!!!

[@christopherzayd147]

instablaster.

[@jasonadams1197]

Great video, one thing. You should always put a rag around the rod when removing the pins to your piston so you don't drop it in your case

[@jarikinnunen1718]

For piston, is good to do wooden wedges under it to keep it in place. Then is easier put clips in and cylinder in place.

[@yjxjtjguy6513]

Just finished mine at it started right up no problems! thank you!

[@RouseGarage]

+YJ's & XJ's All Day thanks for the comment! You are very welcome!

[@RouseGarage]

+YJ's & XJ's All Day thanks for the comment! You are very welcome!

[@g__gg3783]

@@RouseGarage How reliable and do you need to replace the gasifier?

[@richbenson430]

Excellent work brother, GREAT video and tips along with patience. Grateful!

[@patthewoodboy]

you need to put oil on the piston pin before inserting it aswell as the cylinder bore . Great instruction by the way

[@RouseGarage]

+Jonathan Vogel - Great point. I usually don't, but it will definitely prolong engine life.

[@ronr1187]

Also put assembly lube on the cam, (both the bearings and the lobes). And for good measure, both contact points and the pivots of the lifters. Assembly lube is cheap, new parts are not - "An ounce of prevention is worth a pound of cure". May not be needed, but I always turn over any motors I work on by hand with the spark plug removed, to help pump a little oil before a hard start. These little motors are easy to do. BTW, great video. Only wish you did a before test run and an after, to see the difference.

[@Deoge4]

I'm thinking about taking the 6.5 and replace them with 10 g I'm thinking about to do that it'll be even faster any feed back would be awesome

[@nwsights6301]

Wow probably the best most detailed video of this install I've seen, I really appreciate your help with this because I'm a car mechanic but had no clue about these smaller engines! Am looking forward to doing this with my 50CC I subbed and liked the video. 🤟

[@knappster0234]

Thanks for the video it was very helpful, I plan to do one myself for 4H but I would recommend changing the carb jets , I’m surprised it didn’t come with the kit . Over a great vid though thanks !

[@RouseGarage]

Thank you for the views and comment. We will be launching rousemotorsports.com in February, and will be selling the best quality big bore kits. As it’s not necessary to up-jet the carb, it is most definitely best practice if you want optimal performance. In the very near future, we will offer a big bore kit that will include a high performance carb. Thank you for taking the time to watch and comment on our channel!

[@knappster0234]

Rouse Garage np, just out of curiosity, do you know what the top speed is with one of these kits ?

[@portagee]

This is the best video on KZbin I'm telling you bro this is spot on I think I could do this now thank you very much for taking your time to show people like me I'm definitely going to try this now I'm tired of people passing me on side streets lol

[@omniaparatus1890]

Followed your direction and the job went smoothly. Cheers

[@benbennit]

Thanks so much. Did mine last night... having so much fun pinging it around town today.

[@domdip234]

This is an awesome video that shows every single step you need thanks so much for this great video

[@ABCDEFGHIJKELA...]

definitely put a cire or pad lock(don't lock it) around that chain, don't let just hang. a 10 inch piece of copper core wire is best. This guy knows what he doing, if you don't, then put someone thru it to make sure it doesn't fall.

[@joesc3343]

or a bit of string tie around it

[@craigmonteforte1478]

Excellent video i learned quite a bit about the kit and how it works my guess is that its a heck of a improvement on power from the original set up

[@pauls5587]

Just done a lexmoto fmr 80cc big bore rebuild using this video excellent video thanks again couldnt of done it without your help 👍

[@curtisschaftlein9327]

This is by far the best video on KZbin about this 👏

[@RealityRoutine]

looking forward to installing a big bore kit on my scooter, watching this video beforehand and it doesn’t seem that bad, thanks

[@jonnydupuis2041]

Do you have a link to the kit you bought?? His link in the description doesn't work anymore

[@cecileverone953]

Awesome video! I have never left comment on a video before but it felt very compelled to for this one!! Everything was explained perfectly! Very easy to understand. You made this whole process easy and stress free. I did not find my self guessing at parts/bolt locations/ wires or steps taken like I find myself doing thoroughout other people's videos. On top of how easy you made this your voice is completely relaxing. You didn't speed through explanations! And I did not even one time have to rewind and rewatch to better understand anything you did! I can't say enough how awesome this video is! I will most definitely be subscribing & checking out the other videos on this channel!! Thank you for making this so easy to follow along with!!!!

[@oldschoolmotorsports9990]

Lets count how many times he said " Just stick it in there". Enough to have a good laugh. Great video though!!!!!! Really helps.

[@RouseGarage]

😂 That would be a dangerous drinking game LOL

[@marvinonstage]

I followed your video and installed a big bore kit, high performance large valve head and a A9 performance cam. Thank You! Yours was the best I've seen to do this. I'm going to put a big bore kit in my wife's scooter as well. On your video everything was stock except for the big bore kit. My question is do you think the larger valve head and big bore kit are worth it or does it add very little performance in relation to the added cost. I ask because you didn't bother with those upgrades. Also want your opinion of performance exhaust and heavier/ lighter rollers as far as actual performance high end or otherwise.

[@JoshuaStork]

Great video. My only gripe is that you shouldn't use assembly lube on the parts before install. It's going to get into your engine oil supply. You should use the normal engine oil that goes in the engine. That is what is going to be lubing it when it is running anyway and using engine oil to coat your parts means that your oil supply won't be contaminated by the assembly lube which may not be suited to the engine.

[@theamerican7080]

You're kind of right, but any competent and experienced tech knows to change the oil almost immediately after breaking in new engine parts. The factory uses the same lube, and it stays in the crankcase until the first owner decides to do maintenance, if ever.

[@robertrab2563]

Hi all just a helpful way to put in the studs in its best not to use pliers the safe way so you don't slip and hit the threads or slip and hit the smooth srfis on ether side of your head I all git two nuts and put the two nuts on one stud and jam them together then titan then undue and jam nut then do the next one so just keep doing it till your dune. You can do it the way he is showing you it's all up to you how you want it put them in. Have a good day and be safe.

[@OdokuroYT]

Videos like this save me money… I don’t have to ask the local shop In spfd, mo lol

[@bradleyredcrow5023]

Awesome thanks so I hope one day I will do that my 50cc saga by benzou

[@VloggingCountry]

things to know you should put a bigger jet in the carb and I seen in your video you loosening the vales after you tighten the head down I would loosening them first so you get a good tor. on the head because if you do not then could be putting more pres. on the head bolts but grate video like it a lot I have just got a 50cc rally scooter looks like a VIP to me for 125 with looks like 1.2 because it was lay down first ride to me but not bad few little markand I have a 2008 vento triton 49cc that has a big bore on it and I had to jet it up to make it run right

[@jamesbatez31]

Adam Eckenrode what time on the video was that

[@michaelz5692]

So before jetting up, you’re big bore kit wasn’t firing up right? When you added the new main jets, your scooter fired up?

[@VloggingCountry]

@@michaelz5692 the bore in the C. was bad this motor did not have much comp. so i just when to a big bore for about same price and go more power

[@michaelz5692]

Blazin Draging I’m having trouble. I installed everything correctly. Timing, valve gaps, spark gap, battery, piston ring gaps, fuel pump....everything done right. I don’t know why it does not want to start.

[@VloggingCountry]

@@michaelz5692 check comp. first if there nothing its not time right there 2 dots on the gears that have to be time right and vales are think .10 and other is .20 hope this helps

[@fixitdaniel]

Really good details my brother has one iam buying from him and thing of doing this when I get it.

[@hajihassan5433]

Thanks a lots I installed piston in 125 cc on my own.

[@badcompany7908]

I will also be buying my BBK from Rouse MS....not a bad deal at all...

[@frankcolletti8706]

I did it today came out perfect started right up

[@Ps5_legend]

I was going to get a pro to do this but with this video I’ll do it my self cheers mate

[@firstnamelastname-qg3jt]

did you do anything to the carb?

[@eddiejoeplebani497]

Thank you ever so kindly... your video was most enjoyable to watch and was worth to me your weight in gold. In my opinion you Sir are the very example of why the world is a better place by the sheer fact that you are in it. Please keep being who you are, you've restored in me HOPE that there is at the very least "one" kind and desent Man still willing to help, may the blessings of the Universe rain down upon you and yours always

[@ndominguez1982]

Best instructional ever.

[@sovereignentity4924]

Crystal Clear Instructions..👌 Thank you my friend...🙏 Just the video I needed

[@ronzogo]

May as well bore out the intake and exhaust ports and polish. Adds tons more torque and I run a 105 main jet with 20mm carb and thru and thru glass packed silencer. Also have upgraded final drive gear and top out at 75mph with 9 gram roller weights.

[@mrcleanisin]

you should post a video showing your top speed.

[@joegriggsjr.9748]

Man, if I had seen this video prior to getting my big bore kit done, I would have done it myself. Geez!

[@nicholasmoulinie8350]

How much did it cost to have a mechanic do it

[@thomasshirley5046]

Thank you so much for sharing all your wisdom and experience. I l've got 2 fix my scooter engine it has no compression i think the piston has a hole in it or one of the valves is bad now you showing me how 2 rebuld the engine now im going 2 do mine thank you so much i loved youe video and God bless

[@gregdorsha2335]

Great video! It inspires confidence in getting the job done right. Thanks.

[@ericmcginnis9413]

You should use the double nut method rather than plyers to install the studs!

[@fozzysrchobbies1343]

This about the most detailed video I have found, I do have a question though, I must of watched this 5 times , And checked and rechecked everything, I have what seems to be the piston knocking on something while running, I have taken it apart numerous times all the way to the cylinder and check it over and over, I cant seem to find anything everything is in the right place, timing chain is tight no slop the valves are set properly to .004 theres no binding anywhere, everything moves fine. NO issues running , idiling or in performance , it runs fine . Just knocks and its driving me nuts. Fresh rebuild last week. Thanks for the advise so for all the rambiling .

[@richtiger3623]

43:50 I don't know about you all but I don't recall there being any spacers in my engine. Nothing's broken or gone too wrong yet so I think I'm good. First engine rebuild I'd ever done so I didn't do so bad.

[@redcarsarasota]

I have an idea for keeping the chain from falling while you're working. How about using a plastic chip clip? The small ones that are made to keep potato chip bags closed to keep them fresh. The chip clip could hold the chain while you're putting the jug on.

[@frankcolletti8706]

Hey dude this is Frankie from New York.. thank you for your video on the big bore kit......

[@creighklenke3120]

Great video! I followed along and it made the whole rebuild a breeze! She started up first try, thank you!!!

[@Macky4941]

Looking at buying a pair of 50cc gy6 powered motorcycles, will definitely be using this video and kit!

[@RouseGarage]

Thanks for watching, and thanks in advance for supporting our family owned business! Just for commenting, send me an email at [e-mail] before buying. I’ll do something special for ya!

[@Victor-tm2kl]

Perfect, you didn’t miss not one detail

[@leifgramford2138]

Nice work, but be aware of 2 things. Clean your camera lens, and use a longer tip 6o degrees grip to installing the clip side of the rod..and a bit more light maybe. Thanks.

[@gonzalocacucciolo5384]

Awesome video! But the thing about the gasket, just looking at the shape, it looks like only one way it can go on. Thanks again for your video

[@robertu5568]

Hey bro that was the best video rebuild very informative thank you

[@vernonjames5432]

Best video I've seen

[@mauricetamata7567]

thank you so much for the video now i can install big bore kit on MY 50CC SCOOTER

[@RouseGarage]

You are welcome! Subscribe to our channel and visit our website in the description to get free shipping on your kit with coupon code Subcribed.

[@gringoanon4550]

Best a well-thought tutorial I have seen on the subject. thanks for your time and effort.

[@adamcroteau8711]

This was amazing! Thank you!

[@Deoge4]

I've got everything including tools to put my big boar kit for my gy6 zummer 50cc to 80cc But since I've mixed 6.5 and 8.5 rollers in it's riding great I had it at 45 on a straight away should I wait to do the big boar or go ahead with switching 😊

[@rustynuckles3662]

Excellent Tutorial! So I guess when you were installing the piston in the jug you just kept pinching the rings while keeping pressure on the head until the piston fit in the jug?

[@RouseGarage]

+Rusty Nuckles correct. They make tools to compress the rings, but not needed.

[@daveycrockett9408]

Place a shop rag around your connecting rod, before you remove or install your piston wrist pin C-clip..Preventing it from an accidently falling down into the crank!.

[@dirkerp3543]

+Rouse Garage , Wow, you are Very Good at making how to videos and are a great teacher. I bet I could even do this now. Great job, a joy to watch, and I learned alot. My 50cc YY50QT20 sat for eight years and I finally got it running (new petcock regulator and carburetor) and a little paint and Armour All. Thanks

[@brandoncruthers4970]

You are a great teacher man. Thanks for being so informative.

[@stevebrighttheblackguitar653]

Thanks for the great video. I am having this done for me and i just wanted to see what was involved! Glad I didn't try it myself!

[@kennethprovost219]

Best video on the subject 🙂

[@AntwonThompsonAirswag_46835]

My moped is A 52mm 44.1 stroker 139QMB gy6 92cc N A9 cam

[@Dwainpipe21]

It's always a good idea to stuff a rag in the crank case/ cam chain tunnel when removing/ installing the circlips etc to stop foreign objects from finding their way into the engine as lots of swearing and shouting can occur! not to mention the inconvenience of splitting the cases!.

[@douglasbailey2206]

Watched a difference video of this bore kit install the whole time I was like what’s the torque spec for the head. Needless to say theirs never ran lol. Thanks for the vid man awesome job