i think at the pulleys the load is no more than 5-15kg because of gear reduction systems

These rubber belts are also very strong, most of the time reinforced with other materials woven into the rubber

The variator that is the aluminum part towards the front of the bike is 2 parts. Their are roller weights inside that get forced out by Centrifugal force and press the belt forcing it up to the edge of the variator. When the belt is all the way up on the aluminum variator and smaller on the clutch rear pulley it is maxed out and the bike will not go any faster once in that ratio.

@@chriss4365 thanks dude .

Are you from Pune university?

@@kedarpuranik750 galgotias University

@@raviranjanrr17 most of our universities are Hopeless

FYI, Centrifugal clutches have been around even longer

cool

Fyi this is not a transmission it is a centrifugal clutch

Probably why we call them (litteraly translated) 'snowscooters' in my language.

Mark Nope it’s both

Has the belt lasted 50k Miles?

The CVT mechanism used in Burgerman is not quite the same with this one. It's much more like those used in cars, with steel belts. Suzuki even call the belt used in Burgerman "life of the bike item". Surely it's exaggerated, but also kinda true as typical rubber belt only lasts like 30,000 km, while theirs typically last like 80,000 or more, just like yours did. The CVT system used in the video usually don't work well on bikes with larger displacement due to the loss of power is too high (Typically about 25% of power is loss), which leads to poor fuel economy and performance, overheating, vibration at low speed, etc.

yeah actually the belt must be changed after 24.000 km

@@FriedHam what if we use 2 of them on both sides of the engine connected to the same rod?. What will be the efficiency like

Myth confirmed

It probably could be controlled manually if you engineered it right. You would need to come up with a way to manually close the front pulley and make sure that it stays the way you want it. But you would probably want it to automatically go back to the first position when the throttle is released.

@@Kendalon I'd imagine a sort of Johnson-bar type arrangement, squeeze a handle to move the lever, it would lock in place to prevent unintended movement. One concern I could see would be that, sort of like a bicycle derailleur, it wouldn't be able to change ratio when not moving, so if stopped in high-ratio it might be very difficult to get moving again, a problem I'm sure everyone who's ridden a bicycle has experienced a few times. Would either need to have the clutch after rather than before the CVT device, or the driver would have to be really in the habit of moving it to low range before stopping. Though this one is automatic (as is the clutch), it can be noted that the clutch is at the wheel rather than engine, possibly for this reason.

@@quillmaurer6563 Possible fix for that issue. The lock for the manual shift would be attached to a release that is attached to the brake handle.

​@@Kendalon Not sure what you're describing - something that would link the shift lever to the brake so you can't apply the brake without shifting to low-ratio? Unless the clutch is in, that would be like downshifting into first any time you use the brakes, could be a "money-shift" situation. Maybe we're thinking of different contexts, I'd been thinking of this for a car rather than a motor scooter.

@@quillmaurer6563 WellFrom what I understand you were describing a lock that would lock it into a specific position as you shift, correct? Well The lock would need a release on it and it could be attached to the Brake so when the brake is applied the lock would release and then the CVT would return to the starting position.

Centrifugal force. It slows down because the engine is too weak to handle hills. If it slows down the belt adjusts.

Damn good question. Unless you kill someone it's a pass. Theres kids riding round with no road sense at all.

is because of polygonal rollers and theyre weight

What rubber effect????

Rubber band effect* “The belt between the pulleys results in what is commonly known as the 'rubber-band' effect. Essentially, this is when there is a lag between when you dab the throttle, resulting in rising revs and where the power is transmitted to the wheels.”

@@RipsonDsouza what effect? is just the rubber that slip on metal.

Not all Gaming The lag in CVTs is known as the rubber band effect. Look it up!

the variator that is the aluminum part towards the front of the bike is 2 parts. Their are roller weights inside that get forced out by Centrifugal force and press the belt forcing it up to the edge of the variator. When the belt is all the way up on the aluminum variator and smaller on the clutch rear pulley it is maxed out and the bike will not go any faster once in that ratio.

chriss4365 centrifugal force is not real, just saying because you seem to care about your words. the existent force is called centripetal, we use the term “centrifugal force” to imagine how centripetal force really works and in some cases to find the vector or tension directed to the center of the circle. just a friendly tip.

@@yh1669 It is a question if you define your frame of reference as inertial or not. If you use the inertial system in a way that you sit on a point of the circle while it rotates, the vector of the centrifugal force and the centripetal force are in the same direction. Just one with a negative value, but the value is the same. So I would say, what chris said wasn't really wrong :)

Felix my point is that centrifugal force does not exist, it’s a reference to measure centripetal force, it’s not a real vector. as you said the difference of both measures is it’s sign, if you find the “centrifugal” force then you find the centripetal force if you change the vector direction (sign); you can also use that reference or imaginary force to measure tension and other forces. kind of like a constant after you find it. also: theres not such a force that pushes an object outside of a curve or circle, in reality the object is following newton’s first law of motion and trying to keep going in a straight line while the angle keeps changing. centripetal force is the force that keeps an object from going in a straight line and pulls the object towards the centre of the circle or curve: forces like friction and tension. Sorry mate, centrifugal force doesn’t exist, I triple checked before writing this. you are always welcome to correct me if I am wrong.

@@yh1669 god its so annoying when commenters find every single example of someone saying "centrifugal force" and feel the need to tell them why it doesn't exist. we know it doesn't exist, it's just inertia. guess what, people understand what you mean when you say "centrifugal force" so we use it because the person asking the question probably isn't an engineer and just wants a simple explanation they can understand.

Possible but not a good idea because you have to pedal faster and faster to go faster. Remember scooters are at 8k rpms when cvt is fully engaged at top speed.

@@chriss4365 yeah I just saw a video of a bike actually having that soo after the comment. It looks a little more complicated than the one in motorcycle probably because like you said the one in motorcycles are for really high rpm. Also it looks really bulky on a bike, not sure how it actually feels riding with that though.

Nope .... I searched ⁉️

Me to

that is why they named this a fucking "CVT"

older scooter were 4 speed autos

It does that when you slow it down. It sounds funny when people are talking or certain noises are slown down.

Gravity forces it to go faster. The restrictor only limits engine rpms but gravity will make it rev higher going down hill. If you want torque you will sacrifice top speed and if you want top speed you will sacrifice torque which equates to faster acceleration. so if you have more torque you will accelerate slow and have higher top speed. Like a car in its highest gear lets the engine run at very low rpms you get high speeds but very slow response and acceleration unless it down shifts. In a scooter cvt the belt starts like a small gear turning a big gear which equates to high torque to get it moving then it gradually changes to the drive being a large gear driving a small gear which allows the wheel to spin faster. Scooters have the lowest torque band at the wheel when at top speed and highest torque at low speeds.

Examine the cvt. Could be a warped variator plate stuck weights etc...

@@chriss4365 Thanks for answer. I´ve change to a new clutch and variator with a little lighter wheights but the vibrations is still there but not that much. Maybe its normal vibrations in GY6 engines?

Some scooters even have a final reduction gear hub.

Kim Patz you mean the vario ring? Or is that a different component

Ofc it has a limit

Yeah, cars have that too....

Depends on the design, the variator might change ratios at mid rpm range preferably closer to max torque, so once it reaches max drive ratio, the remaining rpm range let's you accelerate You can play around with the control components of the variator to change at what rpm it begins to change ratio, make it harder for the cones to push the belt up and the engine revs bit faster at a lower ratio and vice versa

It can get jammed by objects.

It sure is.

But not really.

Yes not only that the most dangerous part is the contra spring.if u dont know how replace it it can kill u.And even the cover is on,the clutch can letterly explode.

Idle set to high or vacuum leaks. I have videos about that. If you can't find them let me know.

Stay tuned I will be uploading a video with a carburetor working.

Dude, this is CVT... you know its in many modern cars, and every scooter 😂 what are you talking about?

they actually can handle a pretty good amount of torque. this type of cvt is used in the UTVs that i ride, which produces 71 foot pounds of torque. cars use CVTs as well, but they work very differently from this one.

It's a V-belt, not flat. It can handle decent torque but nothing like what a standard auto or manual transmission can. You're not putting a V-8 in front of something like this. These transmissions are good for smaller applications to get better fuel economy and torque usage.

They use toothed belts now, can't really call it timing belt even though it does look like one, so it can handle the torque it was designed to be used in, which in this case would be 50 to 150cc scooters

Not sure but I do know the gear box reduces the wheel speed so it won't be the same as the clutch rpm. It's lowered to increase torque so actually its probably increases the output. I will be releasing a video opening the gear box shortly. Make sure your notifications are on.

The belt doesn't change. The pulley in front varator has weights. Centrifugal force presses on the belt forcing it up. The pulling of the belt causes it to force the rear pulley open making the belt drop inside.

Could be bent variator or clutch. The engine could be doing it too.

there are clutch roller weights inside this system and they get flat with use. ask your mechanic to check them.

@@kvm. if they get flat means you have lead ones get rid of them and get higher quality non lead ones that won't get flat spots.

That is how cvt works. It has no gears. It changes ratios as the belt slides. The variator presses against it pretty hard from centrifugal force. In cars they use a steel belt. It is a stupid idea in cars but works in scooters because they are lighter.

Cant compare this to a car cvt... Those scooter belt systems can handle 30hp with no problem, very simple and good working system!

CVT is a tried and tested technology in both scooters and cars. Advantages in case of cars is that they are much lighter and easier to maintain than the equivalent oil filled conventional (slushbox) automatics which have huge transmission losses - effectively hampering fuel efficiency. With the possibility of infinite gear ratios the CVT versions of cars are often more fuel efficient than even the manuals of the same model, especially in city driving. Disadvantages... Step less transmission does not offer the feel of manual gear change, but now even CVTs have introduced the option of 'manual like' controls in some cars. It also doesn't really do well on off road oriented 4WD vehicles

@Saucy whats the point of not pushing the car? Its stupid. And still it won't last very long even if you don't push it. A good manual transmission can last till 500.000 miles with 2 or 3 clutch replacements which are very easy to do and cheap

It's how snowmobile transmissions have worked for decades. Literally the same thing, just slightly bigger.

Just how it sounds.

Maybe, because the engine it's 1 Cylinder

Less noise with cover on

@@federicosamperi7336 not by cyclyn man

You sure it wasn't a bad bearing those are more important than the belt. Most customers say bike stops moving and belt is usually shredded it doesn't lock the wheel that I've heard of.

@@chriss4365 wheel not permanent lock but when belt stuck in bering. Some time lock wheel. After push hardly then free wheel. But if runiing high speed on highway then happen this. Is very dangerous....

This is only good on a scooter. Cvt is horrible in cars And expensive to repair.

What kind of cycle?

@@chriss4365 gear cycle

@@trading9385 you mean a bicycle?

@@chriss4365 yes

@@trading9385 it wont work because you'd have to pedal really fast to engage the clutch to start moving. If you had no clutch you'd have to pedal fast all the time to keep it in a higher ratio to go faster. I'm sure it could be modified for a bicycle but as is wont work properly.

biztos?

That makes no sense lol

@@TheMogyeee ja a közepèn meg fog tőrni.ha leveszed akkor elgyengűl ès a nyomàs vibràlàs miatt megreped.azèrt is fontos hogy minden csavar benne legyen ha nem akkor is el kell osztani kuplung vario meg a közèp rèszen.

@@nos4me nonsense answer.try it ,good luck with that.

Thats not good.

No because it has a centrifugal clutch

As long as you dont twist the throttle enough for the clutch to engage before releasing the brakes Also, the starter motor gets the sign to power up when the rear lamp lights up, so you don't really need to apply the brakes strongly, just enough to hit the little switch on the brake levers

@@DerKaktusAvant didnt know it has a clutch😂😂😂

@@rohitdalvi9361 everything with an engine has some sort of clutch. (There are a few exceptions, like a leaf blower). But yeah a moped basically has an auto clutch

Yes

it is a cvt transmission that uses a clutch and variator.

It's both

My guess the belt moving around.

@@chriss4365 my gilera runner is now making very high wistling sound about 40 kmh it starts and becomes very loud. I dont now what it is. I thought maybe you got same issue

@@bodrumtarik could be a worn part you'll have to examine it. I have a video on the channel about servicing the cvt if you need help.

the clutch to the wheel does have a gear box to increase torque at the wheel.