Wet clutch - Surely oil is a bad thing

[@Dr_Xyzt]

Bike wet clutches are the best fucking clutches ever. Like you said, any time you breathe on the clutch, the clutch slips enough get your shift, and bam, you're in the next gear. They have that nice concentric splined drum, with coil springs that can be shimmed tighter or replaced. Symmetric clutch basket, simple, XY machined part. There's no Marcel spring like you see on car clutches, that forces you to push the pedal to the fucking floor or else the synchro grinds. All bikes are dog-boxes. For fucks sake, I wish cars were available with dogboxes.

[@TheOldRogue]

Particles should be 'catched' in the oil filter... I used to spoke proper england when i was a children. :P Great informative vid as always Matt ;)

[@justinm6110]

I learn somthing new every video, great stuff mate.

[@233kosta]

We call it the "normal" force, because it's _normal_ (at 90°) to the direction of motion, as opposed to _tangential_ - in the direction of motion. Same thing with supersonic shockwaves. Normal shocks are normal to the flow, whereas oblique shocks are at some angle between normal and tangential.

[@aussieshaunindk]

Noise suppression as you mentioned is a big factor

[@onhawaii]

I love the rattle of the Ducati dry clutch! It sounds like an old espresso machine to me... (when you pull the clutch) And if you live in a big city you know that from all the stop and go the clutch will not last much longer then the tires on the bike. And the sludge you found in the engine might be lots of clutch wear... The oil in a Ducati lubes just what needs to be lubed and will stay cleaner longer.

[@assi2assi]

they sound like sth in the engine is wrong.that´s the reason why they used dry clutches so you dont notice if sth breaks ( and because it is a ducati there sure breaks sth everytime) :p

[@onhawaii]

Marc have you ever owned or even ridden a Ducati? If not then just quit talking shit. A Ducati is only as good as the mechanic that works on the bike. You don't have the right tools? do not even try to work on it. I spend hours and years riding a Ducati even long distance rides. I was never stranded on the road side and need to be town home. Yes I spend money on clutches and Inspections with valve adjustment. And I can tell you right away if they are out of spec without opening the engine just by the way it runs. If you just buy a Ducati to show off you should better buy a Rolex or so. They have lots of character and if you cant deal with it then you should buy a Japanese bike.

[@assi2assi]

keep calm mate was just a joke 1. the dry clutch still sounds like shit and is overrated 2.to answer your question no i have never owned a ducati and never will, because they are way too expensive for what they are (to be clear im not saying that they are shit,but for that prices no street bike would be good enough in my opinion) 3. "a ducati is only as good as the mechanic what works on the bike" ah ok and that is different from the japanese bikes?if it´s different it means ducati isn´t really good if the ("cheap")japanese bikes are better or this argument just makes no sense ;) the problem with ducati are many of the owners, because many bragging like "oh my ducati has a dry clutch (eventough most of them probably dont even know what it is) oh your bike hasn´t one haha must be a shit bike" (yes exaggerated)

[@onhawaii]

Marc, if you have a mechanic that is not used to work on Ducati engines they just fail. In the moment they think they can transfer their knowledge to a Ducati engine. The unique design of it will get 99% of them fooled. I lived with years of other bikers trying to pick on the rattle from that clutch and I gave a shit and I still do. No bikes are cheap this days... so used bikes are cheaper. Oh street bikes like Harley Davidson cost a fortune for old crap engine design. And btw a 600 Ducati Monster has a wet clutch so they do not only have dry clutch engines and they go for small money... And are great beginner bikes if you are not to tall.

[@assi2assi]

ah thats how you meant it, but why do they have to make everything different and complicated compared to the others? yes nowadays nearly every new bike (especially supersportbikes) are way too expensive and i only buy used ones,but even then ducatis cost most of the time more.the dry clutch isn´t the problem (eventough i dont like it),like i said problem are some owners who think they are special and better just because of the dry clutch ^^

[@buildingracingvideos4714]

Wet clutches dont lock up from more force. A wet clutch is much smoother than a dry clutch. They work like a suction cup on glass. When the suction cup is dry it doesn't stick. Lick it then it sticks. I've experimented with oil viscosity on wet clutches. The thicker you go on the oil the harder it is to disengage the clutch. The thicker oil bridges a larger gap between the plates causing them to stay stuck together with less spring pressure

[@buildingracingvideos4714]

A simple experiment to illustrate how a wet clutch works. Take two flat panes of glass. Push them together. Nothing! Get them wet and push them together. Now they're stuck and you cant hardly pull them apart. Thats how a wet clutch works.

[@abhishekkuksal5700]

Explained in a very nice way.

[@beachboardfan9544]

Sooo I should pour loads of DLC into my trans! Just ignore the crunchy sounds

[@gutserker]

I wouldn't want a beginner rider learning to ride with a dry clutch. "Here's your 250cc bike, they have very little torque, but if you use the clutch too much you'll cook it." To me wet clutches make more sense in many situations. I feel like we'd have fewer car drivers ruining their cars as long as they change their oil

[@LesNewell]

A common reason for slipping clutches is using car oil. Bike oils have friction modifiers to improve clutch grip while still providing good lubrication for rolling and hydrodynamic bearings. This is another reason for not using the snake oil additives you see at bike shows. These additives generally improve the extreme pressure lubrication which looks good for when they demonstrate a roller under extreme load but will really mess up your clutch.

[@dirtygarageguy]

"Bike oils have friction modifiers to improve clutch grip " - I think this is the other way around....

[@LesNewell]

Oops, you are right - bike oils don't contain the friction modifiers that car oils do. How did I get it the wrong way round when in the next sentence I rant about the problems caused by additives...

[@naveen..873]

I m working/inventing something new type of clutch system, may it will complete soon and works well

[@AuMechanic]

Never like wet clutches on 4t engines, for one mixing clutch debris with engine oil is just a bad idea IMO, 2 is that in some case you could have an oil that is best for the engine but the wet clutch wont tolerate it. I had to use Penzoil only in my Katana racing all due to the solid basket clutch and extra power it had, other oils that would have been better for the engine would cause clutch slipping.

[@TexMoto]

The CRF line from Honda divorce the crankcase and trans. Letting you keep clutch debris out of the engine.

[@mareksumguy1887]

Tex Moto they should all do that. I think it’s absolutely idiotic using the same oil for all 3 systems. Just like I think it’s idiotic using one oil in auto transmissions... where the clearances in the valve body are even smaller!

[@fuckingpippaman]

so harley is actually forward on this LOL

[@lloydbeebe]

And for the love of God if your bike has a wet clutch do not use any sort of oil that isn't designed to work with a wet clutch. I've had a couple friends ruin their wet clutches by using just bog standard motor oil. Spend the extra $3-5 a quart and by motorcycle oil.

[@flemmingkanstrup5853]

Matt - very interesting. You mention Ducattis a few time - also in your previous clutch video, but how about the boxer BMWs? I know they use single plated dry clutches, and I suspect it is due to the engine layout with the crank in the bikes direction. Is this something I would have to think about with a R nine T coming in the door soon? Wet clutches tend to be driven alot in the friction zone during low speed maneuvering, it I wouldn't think a BMW dry clutch would like that verey much?

[@brahnseer3512]

Surely smoking is a bad thing...?

[@miceeno]

Cassandra One only in a 4 stroke.

[@Soupy_loopy]

Cassandra One, did you come here for health advice?

[@lv0ll9]

Depending on your outlook on life, smoking can even be positive.

[@OldManTony]

Cassandra One It is if you’ve just be having sex!

[@Fee.1]

Can you do an experiment that shows the effect of automotive oil on a motorcycle clutch ? If you put modern automotive oil in a bike does it start slipping more right away or what’s the situation there with the friction reducer additives in modern oil ?

[@brentsmith5647]

Brilliant video thank u♥️👁️👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[@Fee.1]

5:25 so if you have this situation what about the oil is usually the cause ? Using the wrong type or?

[@RS-lm1cz]

Thank you Matt 😊

[@grosbeakmc]

Good explanation - thank you.

[@JustMeZero988]

I always wondered about this and now I know. I don't have my bike now but when I did, (Suzuki GSX600F) the clutch was really hard to pull in. It must have been a gradual thing but in the end, I would ride for around 20-30 mins and my hand was aching, so much so that I used to pull the clutch handle rather with my fingers rather than squeeze it with my hand. What would that have been???

[@Vhdrumm3r]

In case of minor clutch problems, does it make sense to deliberately heat up the clutch as a last resort "cleaning" instead of just buying the new clutch right away?

[@dirtygarageguy]

Heating it up how?

[@whalesong999]

"Heat up", do you mean by excessive dragging? My experience would suggest you're going to char the plates and make matters worse. Most clutch problems came from poor clutch adjustments causing hardening of the friction pads and polishing of the steel plates. Btw, Bultaco had and all metal clutch package with separate and lightweight oil for the primary chain case.

[@Vhdrumm3r]

A few quick wheelies maybe :D

[@reneandersen667]

If you have a 4T engine (ATV with CVT) with dry clutch and it requires a 10w40 API SE / SF. Can a regular car Oil that meets the requirements not be good enough? Or should it be a 4T motorcycle oil? Isn't it because of wet clutch you use specific motorcycle oils on motorcycles?

[@reneandersen667]

You already answered that with this video, kzbin.info/www/bejne/fneppmRsf7KSodE Sorry, my bad..

[@hokiepokie333_CicadaMykHyn]

Can you use 303 Protectant to prolong the life of your wet clutch, and also keep it looking new?

[@johnoleary9317]

Matt. Watch your video back....with subtitles ON. Amazing it handles your accent(no offence. Im a northener too) Yet it doesnt include the colourful words. PMSL.

[@funcounting]

Are there any clutch designs that don't use friction plates at all?

[@dirtygarageguy]

Yes - roller clutches - we'll get to this soon.

[@funcounting]

Nice!

[@LesNewell]

Dog clutches don't use friction at all. They are on or off. I've also seen spring clutches where a spring made of coiled square wire is wound around a drum. To engage drive you tighten the spring on the drum. I've only seen them on very old teletype machines though. Another design is a cone clutch as used inside most manual synchromesh car gearboxes. With these a cone is pushed into in a tapered socket to drive. Matt, if you're going to mention one-way roller clutches you should also mention the humble ratchet.

[@mopzy5328]

a torque converter

[@robg6485]

Matt have you done a video on slipper clutches?

[@roarkshsha]

Why/how does a slipping clutch relate to the age of the oil? Thanks in advance to anyone answering.

[@flavortown3781]

Don't dry clutches weigh less?

[@dirtygarageguy]

LOL why would they?

[@Vhdrumm3r]

Weight of the extra oil and casing?

[@flavortown3781]

The Workshop yeah basically the extra oil and covers and such

[@dirtygarageguy]

Extra oil yes - but that is usually because a dry clutch system is used in tandem with a dry sump system. As for the cover - this all depends on the design of the engine. I said compact not weight. But a good point none the less.

[@LesNewell]

Yes, the clutch itself will weigh less as you can get more friction out of a smaller area on a dry clutch. This (marginally) improves engine acceleration. However the total engine weight is probably about the same or more due to the extra casings, seals etc.

[@markb9419]

well i shall clean my clutch with india pale ale from now on then. who'd a thunk it.

[@theq-1]

Wet clutches suffer from viscous drag in old bikes with low disc seperation.... horrible devices for crunching gears. Some have just 1mm of clutch seperation and divide that over 4 plates and you're talking 0.25mm and the thing will crunch like bollocks due to viscous drag of the oil... more so when cold.

[@heroheroin4718]

hello,, i ve question,, I use PCMO 10w40 APISN/CF,ACEA A3/B4 on my honda 110 4T scooter, factory recomended oil is 10w30 JASO MB,i feel smoother than factory oil, and my engine valve look clean from deposit. is it any effect for my engine later?

[@bluebelt474]

I agree for your question,, admin please give answer yeah?

[@yusufronco]

great thumbnail, lol

[@josh6pack]

Someone please tell me why tf when I expressed deep frustration to my 8th grade science teacher about this per second/per second bullshit, he couldn't explain it that fucking simply. Something as simple as the word "cumulative" would have gone a long way. I've been wondering about that shit for the last 23 years.

[@Fee.1]

Can I get your IG ? Would love to ask you a couple questions if possible. Some advice on oil would be cool But need spring advice more than anything. Unless you know off the top about 2021 Z400/Ninja 400 clutches. I’ve heard the springs are notoriously weak, not sure what fhe correct path is to fix that. Sometimes it feels like when I’m revving to accelerate it feels like it’s slipping a bit and I’m not accelerating as hard as it should be…it’s not obvious unless you’re paying close attention

[@thealvaco]

Dry clutches make a terrible sound, euro 4 hates that.

[@dirtygarageguy]

LMAO!

[@Tim_Nilsson]

Apart from motogp Ducati hasn’t used dry clutches for over 10 years. ;)

[@dirtygarageguy]

So - have all the pre- 10 year old bikes been destroyed? LOL

[@Nerezza1]

This isn't true at all.

[@jedadiahtucker2132]

heat is why they do it. look at a super street bike like a r1 it makes something like 100-150 hp something like that. a mid to late 90's civic (not r or si) makes about the same. imagine hanging that huge clutch off the side of a r1. they needed a smaller clutch and the heat was to much, so its a wet clutch. why not put a smaller wet clutch in a civic? cost and complexity. a larger dry single plate clutch is cheaper and easier to manufacture.

[@dirtygarageguy]

"heat is why they do it. look at a super street bike like a r1 it makes something like 100-150 hp something like that" - LOL quite a bit more. And I'm sure I said heat - or weren't you listening?

[@jedadiahtucker2132]

wow they do make more 200, been a long time since i looked at a SS bike :) yes you did say heat, i would argue though that heat is the deciding factor. a single plate dry clutch is cheaper and easier to make. however if it over heats and prematurely wears out they run a wet clutch. that's all i was saying.

[@TheMik088]

I use the super ,super slippy mixture in mine...

[@howarethingsindenver]

So many Del Pun's:)

[@ianskeggs5294]

9.8 newton per second per second acceleration explained 200 years ago

[@tilsworthworks]

Pulsing clutch lever in neutral, any idea's Matt?

[@dirtygarageguy]

cable or hydraulic

[@tilsworthworks]

cable.......

[@Soupy_loopy]

Doesn't make sense. Thought I heard you say use IPA to clean the clutch, but WTF am I supposed to drink, brake cleaner?

[@paulhanson5389]

That's what I heard. I have a pint of IPA in my hand, never thought I could clean my clutch with it.

[@thegit8698]

Americans!! He doesn't mean Indian pale ale

[@okok-gg5fl]

Is there any machine what is not shite?

[@rebautista2915]

Wat ur tlking about..

[@waynecartwright6148]

full synthetic in a cx is is BIG !!!! no no !!!!!!!!!!!!!!!!!!!!!!!!!

[@justinharris3429]

Do a video on Lock-up clutches FFS

[@Pantera2738]

im still prefer dry clutch and in fact i like the sound.... y hope im gona die on the same bike whit the dry clutch ....

[@MartyWeller]

Buy an XJ600... They have a wet clutch but rattle so much you'd think it was a dry one.....

[@Pantera2738]

i habe the scrambler of ducati and i love it, i hope i can habe for the rest of mi life

[@jamesrennie8351]

Soooper Slippy

[@badattitude9127]

You are completely wrong, its cause we are humans and we love wet crotches. Sorry I thought you were talking crotches, my bad. I had to stop watching because no ciggy and no redbull. You are letting society down Matt, we look to you for moral guidance. I hope you will improve your behavior regarding the issues I have raised. Now where is my joint and pint of Jack Daniels

[@allesklarklaus147]

BadAttitude jack daniels in bad for your health mate

[@assi2assi]

red bull is missing but the ciggy was there at the beginning.so he made half of it right xD

[@mudsucker1971]

Need some coke to go with the jack.

[@miles11we]

Mrah

[@awedwardscleaningsolutions]

First?

[@miles11we]

Yeah bud

[@sidewaysaction9983]

Slipping in first? It's more likely to slip in higher gears....