How would this work for kickstarters because the engine would be at so low rpm that the clutch plates would never get up against the weights?

This is why I love Honda. The engineering is unelaborate and functional. Everything you need without being over complicated.

As people would be riding on them for years, I have always wondered how this device did work. Currently I have been reading and with current technology watching all that I can, trying to understand the little device that got my attention back in the 1960s. What a completely fulfilling explanation of function involving this device. Thank you

Absolute genius. Both the clutch and the instructor. 'Hello Bob'. Gold.

If I can click the "like" button more than one, I would have been clicking it over and over the entire time watching it.. very detailed and precise!

Great job in explaining the clutch mechanism! I always been fascinated by how mechanical things but this one always had me scratching my head. Hats off to the person(s) who designed this unit many years ago, truly one of the most ingenious mechanical devices I've seen over my 60 year life span. There still in use today, recently been working on a China made 110cc ATV with one of these clutches.

While I am fortunate enough to have known and understood this wonderful, elegant piece of engineering, before I saw the video, I must say that I was absolutely captivated by the precise language skills of this young man. With perfect diction and a good clear voice, he projects such an accurate description of what he is doing and what he is showing, including the description of the item and the processes and the actions and the locations relative to each other. I must say that I enjoyed listening to this young man and to confirm what I just described I even closed my eyes for more than 75% of the video and believe me, I followed it all, as the picture painted in my mind by his voice description was more than enough. The English language is not my mother's tongue and here is the reason why I closed my eyes to test myself!!:- More than 30 years ago, I had two university students (brothers) who unfortunately had a father who had lost his sight and he never really ever saw his two sons but he knew them only through their voice and his ears. When I first met these two brothers I was stunned by the manner in which they spoke and how they described their laboratory and workshop and their answers in the engineering examinations. It was sometime later that I got to know that their father had lost his sight before the children were born. The manner in which they spoke to their father had to be such that they painted every detail with their voice. So congratulations to this young man on his interest and ability in understanding this complex mechanical engineering but I must heartily congratulate him on his ability to express himself in such accurate engineering language with no unnecessary frills but such an exact description of the complex invisible functions in question which are invisible and silent in their actions when the cover is on. Well done young man.

I just rebuilt one of these clutches today... Found the video afterwards very informative & they are amazing little pieces of engineering.

This what I've been looking for,so much videos showing how to replace clutch plates but few or even one clear tutorial on how this thing work,.... And i thank you sir for sharing ur knowledge 🙏

you are a mastermind, such a thorough explanation. BRAVO!

I just learned more in 30 minutes than the last 5 years about three wheeler clutches. Thanx bud

That has to be one off the best “how it works” video for the clutch system. Incredible design doing some many things too

Great video! I'm having some clutch issues while shifting, and while I understood how the bob weights worked at idle I could not for the life of me figure out how the clutch disengaged while shifting. This demonstrated exactly what I needed to understand and now I have some good new ideas on how to effectively troubleshoot. Thanks so much!

An amazing explanation for an amazing piece of engineering. I finally understood how it performs so many functions at once, and why the motorcycles it's used in usually don't have oil filters or meshes of any kind. It's still amazing how compact and rugged it is. No wonder these seldom break down, unless you ride like a hooligan. :-)

What a fantastic piece of engineering. Great video and explanation thanks.

You sir are a genius , you don't know how much you saved me , this is the best explanation of how these clutches work , thanks you sir you gained a humble subscriber :)

Thank you so much for this great video. You are really a great teacher, i love to repair my own bikes on sunday (i am not a pro mechanic) , and this video taught me more than i have learned in the last 5 years. I really thank you for taking your time to explain.

Thank you, I watched the entire video, and its very informative... Thanks for the effort of making this video...

great video!! so glad there's such an in-depth explanation. i don't even have a super cub, i just love them

Absolutely brilliant! Painstakingly detailed. Thank you

The oil filter part blew my mind!! Great video.

Really nice video, and very informative! thank you for taking the time to explain everything in detail

Thanks for a great video! I was just thinking to myself "I wonder how a Honda Cub clutch works? 🤔" and this video was exactly what I was looking for! 😁

Thanks so much for the video! Recently moved to Vietnam to teach English and really wanted to know how my Semi Automatic worked!

Fantastic video. I really appreciate this. Worthy of many thumbs up.

Really the best explanation out there... thanks

Very very interesting video and very understandable... I personally work on my little semi automatic motor once in a while and this video explained some questions that I have for long period of time... Thank you and keep uploading videos like that

Before knowing this i really like to have one dual clutch motor,but after watching this i now appreciate my motorcycle now,really its GENIUS

Thank you so much for your in depth explanation. This is wonderful.

Great video. I love the details. Thanks.

Thank you for articulating the inner workings of the clutch, I'm going to check how much crud is there now. Many thanks.

Great video. I'm glad I found it.

Danke, das man die Technik erklärt bekommt und somit mal sehen kann.

Very good and informative video explained in detail!

Thanks for awesome information

Brilliant video. And brilliant Honda design.

Fascinating, Thank you!

Thank you so much for such a nice explanation!

very informative sir thank you

Awesome explanation! Thanks

thank you, this was really helpful

Great Video! I just purchased my first Honda CT-90 (1700 mi) and it is not shifting well. This helps me understand HOW it should work. I may have to get into the engine and see how the clutch and gears look (never been into an engine before). I am going to open it up tomorrow and check to see how my clutch oil filter looks... Thank you!

Excellent teacher

damn, thank you so very much. You explain it thoroughly with so much detail and yet still able to keep it simple enough for a electric engineer like myself with some fundamental mechanical knowledge could understand. I've looked for this quite a long time and did not expect to get my life-time mystery could be solved here :D Again, thanks for the explanation. Keep up the good work!

Thank you for this video I have learned a lot of this well done

Clever engineering well explained.

Great explanation, thank you very much

no wonder my old 2011 chinese moped 110cc still runs so good and still sounds like brandnew up to now.

Great video on à genius device

awesome , you deserve an academic oscar . thank you very much

Very help full... thanks you so much ..

Great video. Thanks for posting. I'm in the process of getting my '72 z50 going again and always wondered what kind of magic happened with the auto clutch to make it work.

Great video

Great job

Exellent. Thank's!

Brilliant design.

I've had cubs which we call crunch box back in the day. I never knew they are so sophisticated. I love those little things. Great video.

Big thank you!

by this video, I'am not gonna hesistat anymore to upgrade my suzuki smash to 250 cc :3

Thank you for this. I just got a pretty sad Honda Monkey and they have this clutch. So now I know a little more 😀

That's a top-quality video right there! Thank you so much. I have been thinking about this for quite a few years. I ride bikes and (CVT) scooters, and I do 90% of the maintenance myself. I had assumed that the clutch mechanism on a "clutchless" scooter was somewhat similar to the clutch sub-assmebly on a CVT scooter, in as much as low RPM engaged the clutch (reduced the diameter across the clutch pads) and higher RPMs disengaged it in the opposite way. Presumably, and it was not mentioned in this otherwise superb video, if the gear change pedal is kept pressed down, then the clutch will remain engaged and the bike will coast, rather like a manual bike? Japanese pizza delivery boy? So you either delivered Japanese pizzas or you used to be Japanese? I did not get that bit :) Liked/Subscribed. EDIT. Oh, and are they still the same now? If I can manage to get myself one of the new Honda CT 125 "Hunter Cubs", is this what I will be maintaining?

Genius engineering! Seems more complicated than the motor itself...wonder who invented this clutch system? Thanks for the education!

It amazes me that all of this complexity (and that of the dual-clutch semiautomatic) is aim at getting rid of the clutch lever.

Yep Honda was a genius and you are too not many people can figure all that out. But to think Honda figured this and engineered this in the early sixties is absolutely genius. That same exact design is used in the today's 2023 crf50f that says a lot!! I own a Honda Rubicon with the Honda matic you should do a video on that equally as impressive maybe a bit more, by far the most enjoyable transmission I have ever ever experienced well maybe Toyotas hybrid synergy drive which just uses Sun gears to manipulate the transmission ratio but I'm off topic awesome video!

Very interesting to watch and easy to understand believe it or not. Now, how you rev match this thing? 😂

Grippy force, love the tech terms.

Fascinating video, thanks. I recently ended up with a 1962/63 C100. Is the clutch/transmission design much different than the one in this video? I'm having issues shifting up or down into 2nd gear, hoping I don't have to split the cases.

Thank you for this explanation, I always wondered how these semiautomatics worked. I think Monkey and Dax lost character when they got the "normal" clutches.

Thank for such a detailed video. During your presentation, we can see two types of slipper clutch collars, one with three notches and the other one with a flat top (30:26 and 21:28 respectively). Why are there two different types and what is the functional difference between them? Thank you in advance

A centrifugal clutch at the front of the clutch pack and a manual clutch at the back of the clutch pack being manually actuated by the shift lever through the drum. A reverse torque mechanism to also actuate the disc pack to engage the clutch to the engine when it's not running to be able to start the engine by pushing the bike forward with it in gear or with the use of a kickstarter. And if that isn't enough, a highly effective centrifugal oil filter. All this in one little package. Did the Japanese actually develop all this from scratch? I doubt it, but they definitely improved on the technology.

Awesome video! Just subscribed! Thumbs up #466

its was a mystery for me how asian semi automatic motorcycle transimission works. thanks a lot!

Such an engineering marvel. I want to know who invented this semi automatic tech. Did Honda invented it? This is to good, i wish this type of technology were used instead of the roller weights cvts.

Great video sir! I have a 1986 Z50J and just recently the machine has started to "stall" when I get to a junction /stop etc. It's as though the clutch is dragging as when I put it in gear the engine revs drop quite a bit. It gets worse the warmer it is, I was wondering what this might be. Any thoughts would be welcome. I listened to your machine at 1:55 and your revs don't sound as though they drop at all. Thanks again

Thanks always wondered how these worked 😳do the little 50 and 70 trail bikes with out a clutch leaver also use the clutch as an oil filter?

Is the 1980 ATC 110 similar? Great explanation video.

you mentioned CVT variator with centrifugal weights at 11:29, but to be clear, scooters have a centrifual clutch also.

Wow i learned more about this system from your video than i have learned on all the subjects and videos ive seen on You Tube thankyou for all the details us this the same type of Clutch that Honda uses in their Hondamatic motorcycles my reasons for having my interest and question is I inherited my Fathers 1964 Honda S90 that is still Stock and in safe storage as i am in between homes and ships at this moment due to a illness and i would like to make that bike a Swmiautomatic if possible as one of my first “ real” Motorcycles i got to ride was a early 1970s Honda Monket Semi Automatic and i thought it would be kind of neat to let my Grand children experience the similar sensation on some privately owned remote properties I have access to i also kind of was hoping to keep the bike looking as much as factory or period correct by using genuine Honda parts or New Old Stick ones that because of the overall popularity of those 70, 90, and 110 motors you can score some pretty good deals on parts from those online Cheers to you my freind as I’m Social Distanced at the moment due to the Corona Virus but kuckily i did get to the liquor Stowe before the giverbnents unlisted on all the Mandatory Shut downs and quarantine rules so to ou my freind I wish you and your Famiky a dub abd safe year without any cimokicatuins or Exposure to the Vtis ! I raise my glas and bow ny head

Blas rak paham 😁 Seng paham gur coro kerjone saringan oli tok 😄 Tapi tetep apiklah videone trimo tak tonton nganti rampung 😃

HI, CAN YOU MAKE A VIDEO ON THE TWIN CLUTH SETUP? THANKS

Spanish traslate, love video

I wonder, why not so many Likes as views :)

teşekkürler

Rad !

Very informative video. But I still want to know how a full automatic transmission works on a Honda 50.

how can i remove the auto clutch? i converted mine it work when gear shifting but when im in first gear and i dont press the clutch the auto clutch still works

Great video, altrough I go few questions. Bob's centrifugal weights basically act as clutch cable, do they wear out when you start moving or all force is taken by clutch plates? How to you move that drum? Is it linked with shifter?

Nice! What about doble cluch ? New model have this

Great video! Can I ask something I have my Honda 100cc it speed up to 60kph only and low power when high elevation is there something wrong with my cluch?

Good video. How many miles on average would this type of clutch last?

I’m afraid you’re wrong about slip avoidance. The mechanism involved does engages the clutch instead. That allows the engine kick start and always cranks the engine when you push, pull the motorcycle whenever any shift other than neutral is engaged. Think about it. With engine not running and any gear engaged you can move the bike backwards freely but cranks engine when you push it forward. Try it.

Would a semi-auto to auto clutch conversion be a matter of getting an auto clutch and just dropping all the parts in there or is there something else involved in it? It wouldn't matter to me if I left the shifter on the bike since I could just take the shift pedal off. I'm trying to convert my nephews bike since I want him to get more power out of it, but the gears are too hard to shift for him even though I've adjusted the clutch as much as I could.

India slipper clutch equipped bikes are very expensive, but this type of technology turned out to be used in Honda cup and it was designed very long time ago

Is it ok to launch the motor by holdin the rear brake n rev it above idol

What are the symptoms of worn clutch bell large springs, between the bell and first plate on an early C50? My clutch is quite noisy/whirs until i depress the gear shift pedal. I swapped everything but those in a time crunch and considering reopening to replace?

Mini Motor Man, Would it be possible for me to download this video and the one you made detailing the building and take down process of the motor you are currently working on? (Not via KZfaq red, though.)

Just bought a 2017 crf50 that sat for 1-2 years. Ive owned 30 of these bikes so im very familiar with them. This one moves when put in gear but not giving it gas. On a stand when running I put it in gear and the back tire starts spinning fast and only stops when put in neutral. I cleaned the carb and adjusted the idle, I made sure the throttle wasnt stuck open or pull up, I adjusted the clutch with the side nut/screw, and I removed the side cover and pulled the clutch out and made sure the plates weren’t stuck then reoiled them and put it back in. Nothing has helped. I don’t understand whats making the tire spin. Ive also tried giving it gas and hitting the brakes to try to free whatever is stuck.

Hankyou for the excellent detailed video and thorough explanation of these I automatic clutch this was a system that mystified me. From my child hood I had centrifugal clutch mini bikes and go carts growing up and a Honda 70 with the semi auto i could easily understand the mini bike system but the Honda always Was a mystery although i knew it worked as i got older and understood more about motorcycle engines and clutch packs i suspected there was. A use of weights and centrifugal force But i thought it worked perhaps by pressing the other way maybe even pushing against the transmission case cover ? I didn’t even consider the wheel chatter you mentioned but It took me over 40 years to understand this system and the power of youtube and the internet ! I do have one Crazy question. On this system if. You can convert a traditional manual clutch Honda into a semi auto by exchanging the two mechanisms ? In other words Convert a antique Honda 90 motorbike into a semi auto with its original transmission ( numbers matching).

Good explanation of the Mechanisms, but Didn't explain the Oil Through Spring and how it helps to disengage the clutch plates in order to actually shift gears while riding. I had this issue where I Could Not Shift Gears while the motor was running. You absolutely need the Clutch Oil Through Spring or you cannot shift gears. Please, can you post a video of how the Oil Through Spring Works & Why.

Very good technique . Please tell me Honda semi auto clutch pack price for 100cc in India . From where we can obtain Honda semi automatic clutch pack in India.