I am 35 .. I am driving scooters all my life, address ,gillera ,vespa,beverly , liberty... First time in my life i learnt how scooter transmission work ! Thanks bro .

everything is so clear when you get a real demonstration! I had looked at pictures and text explanations for a while but coudn't really imagine how it really worked... Now I understand why they say a CVT has essentially "infinite gears". Thanks!

damn, son, there are some smart ppl who can invent this kind of stuff. Engineering is incredible!

i learn much more from you than a 8 hour pay per class,Thank you.

Very well explained! Even the smallest things in transmission can make a difference in performance. I've bought my second scooter - 2013 Aprilia SR50R (carb ) and I''m rebuilding it to 70cc ,i did rebuild my 1st scooter Yamaha Aerox to 70cc too ,but only changed the pipe, cylinder kit and air filter. It ran good for the small amount of tuning i did. But the SR50R i'm tuning a lot more -sport transmission ,Yasuni pipe , streetrace 70cc ,bigger carb ,intake etc. ,thanks to this video I learned a bit more about transmission tuning. I'm surprised that in USA the scooter tuning is also popular. I'm from Europe (eastern europe - Latvia) and here it's a very popular thing amongst teenagers and even adults. You can pass the moped exam if you're 14. ( I'm 16 btw.) We even have a scooter forum ,official scooter meetings twice a year (10 or 11 years since the 1st one) with cast-iron and aluminium class drag races , and a lot of scooter riders upgrade their rides a lot to win those drags..even porting cylinders and engine blocks. In the past I thought that in USA people only put 150cc big bore kits on their 4 stroke chinese scooters and that's all with tuning :D but I'm surprised that there are 2 stroke powerful builds with all the known brands - Malossi ,Polini , Stage 6 etc. A subscribe and like from me.

this is the point i know you know its a nice feeling plus the sound of the engine is also to my heart

Recently bought a scooter and been searching for this video for some time. Good job explained all ive been wondering about. Keep up the good work. 👍

This was far easier to understand than those fancy 3d animations thanks man . Lv from india

What an incredible and interesting explanation of how the CVT works.

Great video explaining the variator and clutch. Super helpful to see it in action too. Thanks, really informative.

I love this channel. So much learning and fun!!! I have a 2008 Zuma 50 2T I been overhauling with yalls videos. Thank you

You are OUTSTANDING at explaining things!!! Thumbs up! Those Polini engines kick ass!

Great vid, I'm fixing my friend moped and found the clutch variator destroyed, thanks

a really great practical explaination on scooter transmission, great job!

Thank you for this video! I've learned a lot and I'll be applying it to my XMAX 300 when 12,000 miles come!

Dude great job on the explanation confidence level went up after watching your video Thanks

Finally, someone who can fully explain the functions of a CVT! I have a V-Moto Milan II 50cc and from the sounds of this video, installing all those components is possible, am I right? I'm in Australia and I've hardly seen any modified scooters in Adelaide...

Thorough explanation. Appreciate it!!!!

Appreciate your time spend learning the dynamics of it and enlightening us❤

Best video that explains how CVT works in a scooter. Thanks.

Really good visual explanation :)

very good explanatory video And with very good image and sound quality It is a mobile phone or a camera thanks

Amazing video, full of info that a normal person can understand!

Now I know the thing completely .. Best and most detailed video ever made.

Excellent presentation and content ! LIKED/SUBSCRIBED !

Gotta love the sound of a well-tuned bike. 2T😍

I just learn little bit more about cvt. Awsome!!!

Best explanation I seen yet! Great work guys.

Wish I could buy this cvt kit for my 2017 honda forza 125 cc

Wow thats nice man actually i understand everything the way you explained and i also assembled those scooters in the philippines like honda dio mostly two stroke that was way back before and have a knowledge in putting those things for racing but financial is a big concern on our side that time so....but hope someday....hehehe thanks guys

That’s really good explanation followed by a visual demonstration. I know better now. Thanks man

Great job explaining that and showing how it works.. Awesome thank you

great explanation.. your voice needs be louder from beginning though...

That is so damn cool!

Your 2 stroke engine sounds awesome!

The best Explanation I've seen here in youtube so far

Just subscribed! Awesome video bro!

How many RPM do you have on your clutch spring and center spring?

A very good video.. i am searching for scooter engine working video , i got this in 2 to 3 days after it......good explanation..

Excellent video first time I saw it I was confused now I’m pretty clear on what you’re talking about thanks for the info

So x 1000 = this guy!

Now i know how my scoot works 😁

Great video man! And really nice bike, greetings from Brazil!

You have taught me something new and interesting, thank you.

Can you tell the most common reason(s) why belts wear out (way) too soon?

may i ask how are the rules for you in the u.s. because i love to work on my scooter its fun and "relaxing some times" but if my scooter makes it to 80 kmh/ 50 mph they will take away my license and if you really unlucky the also conficated your scooter here in the netherlands. and what i always show the cops is he orignal manual from my piaggio typhoon. it says at 50mph atleast keep about 10m/33ft from the car in front of you. and they just say that its not true.

Great video! How do I make sure that I have the proper weight sliders vs the proper clutch tension springs ?

Very helpful! Thanks so much for the thoughtful presentation!

How about a bbk install video? Let's see how easy it is.

iam a heavy dude 135-140 kilo and i got a stock 50 cc scooter whit me on it its slow starting up but ok in top speed, how or what do i chance to make it faster in the start up ???

Damn man! So many questions answered! Thanks a lot.

Thanks and very nice of you to explain and even show how CVT works. I am new for this type of transmission and I have a Romet GT125Mx and I have a problem when it comes to stop and start to move in a ramp especially when having a pillion. the scooter is very sluggish to get going. what can I change and which things should I rerplace to get it better. Thanks once again.

I wish you had worked on my bike , ,maybe know I would be able to say I have one , instead of scraps

I think you could've done that whole video with the camera in the tripod.

I talked to Paul today at your shop, cant freakin wait to get my 08' zuma flyin down the road! Im thinkin about ditchin cars and start fixin up scooters

Super video! Great explanation of CVT! # question. Is there a CVT cover with a kickstart Leaver that is available for my 2018 125cc Zuma.

He made this vid to flex off the burnt titanium drive face 🤣🤣. I’m joking but nice vid I’m gonna start working on mopeds my self starting with my Aerox

I like CVTs in scooters, ATVs and snowmobiles but in cars I hate them. Mine blew out right after ended warranty what bullshit. Not cheap and easy but the opposite.

When I first found out about this type of cvt was about 1950. Salsbery motor scooter used them. It was the fastest motor scooter on the marker at that time top speed above 70 MPH. Honda bought out the rights to that cvt and put them in their Honda dune buggies about 1970. I had 3 of the buggies. The cvt only caused trouble when it got wet. I had to push it out of a river bed.

That was super helpful, i understand my bike now. Thanks a lot bless your heart.

Just disassemble the cvt and you will know how it works believe me that's what i do :D

On earth we call that torque drive

This video is very helpful. Thank you! :D

I've got an uncle that lost his license for 10 years, but does work for me. Sometimes he rides his scooter in to work, because that is the only thing he can legally drive, but other times he has to get a ride. This slows him down quite a bit, as scooters aren't as fast as vehicles and he is a carpenter, but doesn't have room for his tools. I'm fascinated by these modifications, and wonder how fast and powerful you could make a 50cc scooter before it would be super obvious to law enforcement and get people driving with a suspended license busted. Also driving them in the winter is very very cold. I'll bet the 3 wheel trike scooters could have some sort of "cab" attached to help with that.

Great video..changed output shaft and seal on malaguti f15 rr 69cc. Used to do 50mph. Changed belt and rollers at same time. Now moped only goes to 30 but nice and 20 up a hill. Any ideas? Old flat rollers were 4.8g. tried 6g, 4.7g and now 4g.

This is great! I learned alot from you Guys!

Dude cool video! Thanks for the info..

Beautifully explained! Oh i did love that.. oh it stinks.. smells good! :)

Wow! I am going back to the Philippines and planning to buy a NMAX Yamaha scooter.I always wanted to know how it work and thanks for your vlog now I know...

Very nice explaining. Hope to learn more from you

Great job, many thanks for your help

So much makes sense now... thank you!

I don't own a scooter yet, but I plan to. I'm an old motorcycle rider who has to ride a trike due to my wife's many health iseeus. But I am now looking at scooters for the amooth ride. I think the engineering that went into a scooter's cvt is amazing. It is so simple and yet works so well. Your video does a great job explianing how they work. I will probably change the clutch springs on whatever scooter I buy. I will install weaker springs becsuse I want the clutch to engage sooner than stock. Then I will look into the rollers to make sure the front pulley is giving me the max it can give. I don't know if I will change the spring on the rear pulley because it seems to me if I have the right weight rollers in the front pulley it shoud over come the spring in the rear and give me the maximun performance. Well, good enough for me anyway. Thanks for such a good video on a scooter CVT and thank you for removeing the cover and showing exactly how they work. I already knew how they work, but it was nice to watch one while it was in action.

Great explanation, ill tune mine soon

NICE, keep up with the good mechanical work.

Thanks for the video, I have been searching so many options for clutch and vario, but all lead to different directions. I have a Vespa 300GTS and am looking for higher top end speed. Based on what I gather here, I would want heavier weights and a stiffer contra spring? Is that accurate or am I backwards on something? I have done some other upgrades and I notice now that when I start the bike and it is at initial idle on the stand, the rear wheel is spinning much faster. Based on this video that tells me I am hitting higher RPM's now and the clutch is engaging sooner. That would be corrected by heavier vario weights to slow down the spin? Thank you so much. I have been crushing through your videos, great help!

Another excellent video. Thanks!

In gearless scooters, should we apply little bit of grease on round shaped rollers and roller-grooves in variator for smooth spinning of rollers in variator? Or will it make more issues after some time like dust deposit, sides of rollers get flat faster, vibrations will increase etc ? Please tell what should we do with proper reason.

Can you make a video, explaining in what order to tune your cvt? do i start with rollers and dial in my vario first or do i start with the clutch?

Thanks for this. Do you have any idea, why is it that: on my scooter when i start mmoving with the bike at the beginning its shaking the whole bike for a few seconds and then its smooth again at a higher speed. So its shaking at the beginning of the speed up process, is the clutch spring not ok, or the whole clutch worn and not cathing the clutch house properly? Do i need to replace all parts or just spring or other parts?

Excellent lesson. Cheers buddy.

tHANK YOU SO MUCH FOR THIS VIDEO, This explains many things for me. wish i could buy it for my Honda ADV 150.

Very informative THANK YOU SOO MUCH!!

I have a 2003 yamaha bws, did a brake stand and it started to wheel hop. I developed a vibration and eventually lost drive. IS it usually a belt that snaps or the cvt went to shit. I still have to take it apart to have a look.

Best video ive watched from you guys, tons of clear info. No amped up dudes on enrtgy drinks talking about their little weenies!!

Can you please tell me exactly what scooter that is or where to get all the stuff for that CVT? I have several project ideas that a CVT would be perfect for. They’re small engine projects and this looks tough enough and simple enough that I can make it work.

If I were to do the "sharpie trick" and I get som sharpie marks left, do I need other weights? Other clutch springs? Harder or softer? Lighter or hevier weights?

If you started with a standard transmission, how would you go about adjusting from the word go? IE how much wieght to drop in the rollers, how heavy to go on the clutch springs and so on

I have a question, my cvt belt was worn out from 17,5mm to 16mm. but I ordered and installed 18,5 a thicker belt, I added some shimings in variator so the belt would stay as low as possible and it was as high as high in the rare (clutch plates). but it's still the same belt doesn't go all the way up on the variator, I squeezed the belt in the clutch as much as I could And I THINK THAT MY CLUTCH DOESN'T LET THE BELT GO ALL THE WAY UP 😫😫

Is there a!chance that shimming the boss and fit the belt lower in the vari will also prevent the belt from travelling further up the edge of the vari and lose top end speed? Will a slightly heavier roller solve the belt travel when shimming?

What is the perfect weight for rollers to get max speed? I already changed my cluthch springs to race springs.

Does the contra spring help pull the rear pulley together against the belt and why is the torque driver neccesary ? Thanks

that was awesome....finally understand

I need some help with buying the right clutch assembly. I have an 80cc bbk , 139qmb engine

Thank you for this video👍👍

So if my bike is only hitting about 8400 rpm’s and holding when I pin the throttle, what can I do to make it hit a higher rpm and have more speed? I have 1500 rpm springs, and I’m running 5.5 gram rollers or 5 gram one of the two, the bike is a 139qmb with a 50mm bbk on it , just a free barn find I built to wheelie but it’s really got me into scooters and I really wanna understand how to easily tune; bike will only do 41 mph @ 8400 rpms

Really amazing explanation !! i literally expecting to show how it actually work when its all powered up.

Wish I could have you to fix my Scooter. You have been very helpful in your video.

Hi Should the crankshaft lock? Their is some play moving it by hand or should it move freely? Just ordered new belt as old one was loose. Thanks Great Vid

this was a very nice demonstration! must have been tough taking the video with one hand on the camera though!