Centrifugal Clutch – Explained

How does a centrifugal clutch work? What is a centrifugal clutch? Centrifugal clutches are used in go karts, mopeds, chain saws, lawn mowers, and many other small engine powered devices. They work by using the principle of centrifugal force to have a clutch shoe apply a friction pad against the clutch housing, thus rotating a device which requires torque to run. At idle speed, springs hold the clutch shoes in so that there is no torque transfer to the clutch housing.

Related Videos
Drum Brakes – https://youtu.be/LX4mqzoe3BY
Clutches – https://youtu.be/pJj8NvDUSFs

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37 thoughts on “Centrifugal Clutch – Explained

  1. well I have a question. I have a 100cc motorcycle with a centrifugal clutch and a multiple friction disks clutch , I can totally understand the accelerating process but what about decelerating? I use engine braking on my motorcycle quite often but I don't know why when the clutch is driven by the wheel it's in engaged mode. Does it has some sort of one way clutch fitted in or something?

  2. Cj Amor says:

    hey man can u make a video on how honda wave 125 clutch working animation

  3. cartfart says:

    idk about you but thats cool af

  4. Arjun Bhat says:

    Is it possible to replace a centrifugal clutch in a scooter(CVT driven, 110cc) with an electromagnetic clutch? And tine the timing and engagement to the speed of the engine at which centrifugal clutch engages?
    Please reply ASAP.

  5. will it did dis engage at the same rpm it engages at?                 or will the rpm be a little lower?

  6. So for vehicle, this kind of clutch is only used for automatic vehicle. Am I right?

  7. Spartan Clan says:

    thank you very much sir

  8. Good Boy.

  9. the power comes from engine. and then to clutch. then why it goes to transmission ? and if it goes to transmission at the last. then how the varying speed from transmission to the driven shaft ?

  10. Explain how does a vehicle move from rest when it doesn't have the RPM enough to engage the clutch shoes.

  11. Thank you!

  12. What about a centripital clutch? For example, a snowmobile, where it clamps down on a belt as more throttle is applied. I have a basic understanding of how it works, thanks to high school physics, but I would like to see more of the mechanical science behind it that you offer. You do an awesome job of explaining this stuff. I'm more of a mechanic and know what components work with others, but I love that you explain how and why. Keep up the good work.

  13. PunkyB 88 says:

    could you please do a video on how a Hondamatic transmission works? pretty much just Honda and Saturn that i know of use them. where you have a torque converter as you would with a planetary auto but with the manual style parallel gears each one with it's own clutch. i find it hard to explain to people the difference between a typical borgwarner e.t.c vs a Hondamatic

  14. Thanks! Just what I was looking for. Your videos are fantastic.

  15. D. G. says:

    So this clutch is sprung closed? The spring is tension is critical to its use? What is calculated to find this release tension of the springs?
    Great vid!

  16. Your videos are quite astounding and informative also…I have only problem that both the clutch housing and the inner part are moving at same speed ?

  17. Paul C says:

    The only transmission type I haven't seen you do yet is "CVT Constantly Variable Transmission", or "V-Belt" drives.

  18. Jake Schultz says:

    I have a passion for understanding more about automobiles and you have definitely broken the ice as they say. thanks alot

  19. T Ml says:

    Thank you for the video. But I still want learn how to ride a motorcycle such as the manual Honda Super Cub 50 without clutch lever (understandably instead using Centrifugal Clutch). Regards.

  20. at low speeds shoes will not be in contact with outer housing,then how is power transmitted in that case to wheels??

  21. Tree Perry says:

    once again! you've helped explain it in a very simple way! Thanks!

  22. ram reddy says:

    What happens if there is no clutch and if directly engine is connected to driven shaft

  23. Shariff G says:

    video is blurry and cant see the board that good

  24. Can this be used for bigger CC bikes?

  25. colesthelol says:

    Isn't the Honda Supercub an application of this?

  26. Ahmed Nasef says:


  27. Ahmed Nasef says:

    I have a question
    I have made a go kart on my own and used a gasoline 13 hp engine and a centrifugal clutch , chain and a sprocket on the shaft carrying the rear wheel just like that drawn on ur board
    The system works fine except for 1 thing
    When the car is at rest and I fire the engine it doesnt go that powerful it just never lose traction because the clutch slips so power is lost to friction even if I floor the gas pedal the wheel never spins the car just keeps accelerating at a very slow rate till it reach the max speed
    however the clutch I used is rated at 13hp so it should grip and give me that push of the start line

    I have seen go karts that drift and smoke tyres on youtube with smaller engines than mine so ?????

  28. could you do a  torque converter video [minibike type]

  29. Wow thanks man i have learned so much from all your videos pleas keep making them!
    P.S: Can you maybe make a video about how motorcycle clutches an gearboxes work?
    Thanks alot!

  30. Amaan Fazeer says:

    I have a small question not related to this particular video.What is the engine timing belt and what is its purpose?is it related to inconsistent engine idle?

  31. papalevies says:

    How do you disengage the clutch to switch gears?

  32. tirimut says:

    Isn't there a certain RPM interval where the springs are stretched enough so the friction pads contact, but not actually transfer power effectively to the housing? I imagine it's similar to riding a conventional clutch. This can't be good for clutch wear. So these clutches are good for engines that are either sitting at idle or just getting the nuts revved out of them and nothing in between, right?

  33. so how does the disengaging and engaging process of this clutch happen

  34. ABHI JITH says:

    this is great i use them on my RC Nitro cars . But how does it work on the kawasaki H2 . please make a video on how the supercharger and a Slipperl clutch works on a kawasaki H2 . thanks :)

  35. Great. So that's actually why people call those little-engine powered vehicles automatic? They use a clutch that engages and disengages automatically, depending on the RPM. Is that so?

  36. Hello +Engineering Explained, I just got a random question that popped into my head. Would it be possible to use this type of clutch in a car? if yes would it have the ability to fully transfer the torque?

  37. Hmmm…. I see alot of car videos here. >.>
    Maybe more motorcycle videos and then I'll subscribe x3
    Maybe FOR EXAMPLE, explaining a v-triple w sort of motorcycle engine, or the different types stroke engines (5 stroke and 6 stroke etc)
    I suck at explaining I know…. surry. -.-

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