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

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

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!!!

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!

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.

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.

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.

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!

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.

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!

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.

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!

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

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

Absolutely great step by step instruction, thank you!

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.

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!

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😊

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

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!!!! 😁😁😁

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

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. 🤟

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

Followed your direction and the job went smoothly. Cheers

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

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

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

Thank you very much from France :-) the best tutorial on KZfaq to install a big bore kit .

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.

Great video. Thanks for taking the time to share. Definitely increases my confidence level being a non-mechanical newbie. Thanks!

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

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

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

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

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!!!!

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.

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

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

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...

+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

Best instructional ever.

This is the best video on KZfaq 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

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

I did it today came out perfect started right up

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

Hi Rouse! Great Tutorial! Congratulations!

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

awesome video, you did a really good job. I'm looking into an 80cc kit soon.

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.

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.

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.

Thank you for posting this video it helped me out quite a bit

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

Awesome Awesome. Such elaborative walkthrough

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!

very good explained video,, i am planning on doing this to my taotao 50 and also other upgrades.

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!

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

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

This was amazing! Thank you!

Respect for labor, thank you sir 🙏🏻

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

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

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

I respect you man I'ma try to do this tomorrow

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

A good informative video! Thank you 😊

great video , keep wrenching

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

Wow superb ..... everything clear

thanks for your video it helped me out allot!!!

Wonderful. Just what I needed.

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

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!

Great info!, great video!!! 👍

Thanks so much, worked perfectly. From.Guatemala, C.A.

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

Perfect, you didn’t miss not one detail

Great step by step vid sir. 😊

Thank you very much for this video very helpful

Great video. Thank you!

best video on this. Thank you!!

I liked your video cleared up some misconseptions

Thanks fore shareing great information! ✨❤️

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.

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

Nice video, thanks. Your garage looks like mine, accept I have two 65 Mustangs.

Best video on the subject 🙂

Used your video again, thank you

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.

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.

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

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

Thank you Awesome Video!

THANK YOU!! YOU ARE THE BEST!

Great video brother

Great video just order the big bore kit

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

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

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