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General Category => General Discussion => Topic started by: swordds on November 25, 2015, 05:57:52 PM

Title: Dry vs Wet Clutch?
Post by: swordds on November 25, 2015, 05:57:52 PM
I have placed a down payment on a 2016 V7-II Stone that should arrive near the end of December or early January but I have some questions regarding how to drive the bike when it arrives.
    - my previous bikes have all had wet clutches.  Standard practice with a wet clutch (at least for me) is to intentionally let it slip when driving slowly and to leave the bike in 1st gear with the clutch disengaged, my left foot on the ground and my right foot on the rear brake pedal while waiting at a stop light, even if waiting for several minutes.  No problem with a wet clutch but will this be hard on a dry clutch?  Do you guys leave the bike in neutral with your right foot on the ground so you can quickly shift into first when the light changes or do you just hold in the clutch lever?
     - why do they call it a V7 Stone?  We're they "stoned" when they were trying to think of a name or does stone mean something in Italian?  And what does the "7" infer?
Title: Re: Dry vs Wet Clutch?
Post by: Triple Jim on November 25, 2015, 06:01:59 PM
Do you guys leave the bike in neutral with your right foot on the ground so you can quickly shift into first when the light changes...?

That's what I usually do.  The "7" is a simplification of about 750cc. 

Welcome to the forum!
Title: Re: Dry vs Wet Clutch?
Post by: oldbike54 on November 25, 2015, 06:08:05 PM
 Stone refers to a non gloss paint , although my buddy's stone is shiny , so yes , maybe they were stoned  :laugh:

  Dusty
Title: Re: Dry vs Wet Clutch?
Post by: Kiwi_Roy on November 25, 2015, 06:13:08 PM
That's what I usually do.  The "7" is a simplification of about 750cc. 

Welcome to the forum!
Me too
Always to one side of the car in front so I don't end up as meat in a sandwich.

Welcome to the forum, you don't have to be crazy but it helps.
Title: Re: Dry vs Wet Clutch?
Post by: Cam3512 on November 25, 2015, 07:01:59 PM
Sometimes I get really wild and put TWO feet down.  But I'm crazy like that.
Title: Re: Dry vs Wet Clutch?
Post by: Silver Goose on November 25, 2015, 07:14:00 PM
Swordds, Welcome to the group and congrats on getting your V7.

I do not hold the clutch in while waiting for a light.  Any time I stop for more tan a few seconds I put the bike in neutral and release the clutch. The reasoning behind the statement and actions is simple. The clutch release bearing(throw out bearing) is very small and highly loaded. In an area of limited cooling, high loads and little or no lubrication, keeping the pressure on is not good. I know that some will jump up and say they have been holding in the clutch for fifty years, I say, OK. In a wet clutch arrangement at least there is some oil to help lube the bearing, but the bearing is working for no good reason, why do it? If you think cars behind you will run over you forget it you can out run any of them and if you watch the lights you can put the bike into gear a few seconds before the light changes.

Good luck, be safe.
Title: Re: Dry vs Wet Clutch?
Post by: pyoungbl on November 25, 2015, 07:27:42 PM
The V7 name goes back to earlier, and very successful, small block machines.  Thus the reference is similar to the way the 1400 cc bikes are named California or Le Mans, both are historic Guzzi names.  The bikes are not 700 cc, nor are the new V9 bikes 900 cc.  In fact, the Norge 1200 and Stelvio 1200 are not actually 1200cc...you gotta be flexible.  Have another glass of wine.

Peter Y.
Title: Re: Dry vs Wet Clutch?
Post by: Wayne Orwig on November 25, 2015, 08:10:58 PM
No problem with a wet clutch but will this be hard on a dry clutch? 

Just drive it. There is little difference. Well, wet clutches are easy to damage if you use the wrong lube. Not an issue with a dry clutch.
Title: Re: Dry vs Wet Clutch?
Post by: Triple Jim on November 25, 2015, 08:46:34 PM
To me, the biggest difference is dry clutches are not great for high throttle, high RPM clutch-slipping starts from a dead stop, as in drag racing type starts.  At least it's not good for the longevity of the plates.  Oh, and they have a cool jingly clinky sound when the engine is running and you disengage them.
Title: Re: Dry vs Wet Clutch?
Post by: lucky phil on November 25, 2015, 09:02:40 PM
Standard practice with a wet clutch (at least for me) is to intentionally let it slip when driving slowly and to leave the bike in 1st gear with the clutch disengaged, my left foot on the ground and my right foot on the rear brake pedal while waiting at a stop light, even if waiting for several minutes.  No problem with a wet clutch but will this be hard on a dry clutch?     
Sorry to burst your bubble, but....YES problem for a wet clutch or any clutch.
You shouldnt sit at a standstill with ANY clutch wet or dry for extended periods of time. All you are doing is glazing up the clutch friction plates,heating up the steel plates and loading up the throwout bearing and gearbox input shaft bearing and on a wet clutch heating up and putting friction material into the oil.
Any time you have the clutch disengaged for anything other than selecting gears or smoothing out the drive while riding slowly in traffic is a negative. Obviously the latter isnt exactly great but its less harmfull than bunny hopping along.
Any clutch is at its happiest when fully engaged.
Ciao

     
Title: Re: Dry vs Wet Clutch?
Post by: fotoguzzi on November 25, 2015, 09:12:44 PM
The V7 name goes back to earlier, and very successful, small block machines.  Thus the reference is similar to the way the 1400 cc bikes are named California or Le Mans, both are historic Guzzi names.  The bikes are not 700 cc, nor are the new V9 bikes 900 cc.  In fact, the Norge 1200 and Stelvio 1200 are not actually 1200cc...you gotta be flexible.  Have another glass of wine.

Peter Y.
UMm no, the V7 Sport was a Big Block.
Title: Re: Dry vs Wet Clutch?
Post by: Aaron D. on November 25, 2015, 09:56:47 PM
The original V7 was a loop frame. 1966.
Title: Re: Dry vs Wet Clutch?
Post by: canuguzzi on November 25, 2015, 10:19:51 PM
Way over thought. At a stop light, leaving the bike in gear and the clutch level in isn't going to hurt a darn thing.

Its a clutch. Ride the bike and enjoy it. There is no different way to ride any MG than any other bike. The less time you spend wondering if this or that is different the more fun you'll have.

BTW, welcome.
Title: Re: Dry vs Wet Clutch?
Post by: rocker59 on November 25, 2015, 10:38:22 PM

    - my previous bikes have all had wet clutches.  Standard practice with a wet clutch (at least for me) is to intentionally let it slip when driving slowly and to leave the bike in 1st gear with the clutch disengaged, my left foot on the ground and my right foot on the rear brake pedal while waiting at a stop light, even if waiting for several minutes. No problem with a wet clutch but will this be hard on a dry clutch?  Do you guys leave the bike in neutral with your right foot on the ground so you can quickly shift into first when the light changes or do you just hold in the clutch lever?
     

That's the way I ride my dry-clutch Guzzis.

I only go into neutral if it's a reeeaally long wait.  Otherwise, I like to be in gear so I can move ASAP.

My tall-geared Sport 1100 requires slipping the clutch in 1st gear when moving at a walking pace.  I've done it for years with no ill effects.

That being said, the V7 is geared pretty low.  For a Guzzi, anyway.  My V7 Special will idle smoothly around at 1500 rpm in 1st gear.  My sporty Guzzis have never been so forgiving at a walking pace.
Title: Re: Dry vs Wet Clutch?
Post by: oldbike54 on November 25, 2015, 10:52:07 PM
The original V7 was a loop frame. 1966.

 Wasn't that original loop called a V700 ?

  Dusty
Title: Re: Dry vs Wet Clutch?
Post by: Aaron D. on November 25, 2015, 11:26:30 PM
My V700 had a V7 decal.
Title: Re: Dry vs Wet Clutch?
Post by: lucky phil on November 26, 2015, 12:26:33 AM
Way over thought. At a stop light, leaving the bike in gear and the clutch level in isn't going to hurt a darn thing.
Hard to argue with that kind of enlightening technical input.
Ciao
Title: Re: Dry vs Wet Clutch?
Post by: Vasco DG on November 26, 2015, 03:25:58 AM
Depending on a host of factors damage may be more likely to occur in these sorts of scenarios but at the end of the day it's a clutch, wet or dry, designed to work in an everyday road environment.

While I wouldn't recommend sitting at lights with the clutch pulled in any more than I would recommend, (On bikes that you can do this on.) setting the idle speed as low as it will go because it "Sounds cool!" But at the end of the day unless you're a completely witless fuquetard just make sure your bike is well set up and ride it.

Pete
Title: Re: Dry vs Wet Clutch?
Post by: Ighani on November 26, 2015, 04:47:56 AM
Swordds, I do the same thing at stops. I don't care so much about the clutch's health as I do my health. Being in gear and having both hands on the controls gives me chance to get out of the way quick when I realize the SUV coming up behind me isn't gonna stop in time. And as Kiwi Roy says, leave an escape path when stopped.
Title: Re: Dry vs Wet Clutch?
Post by: rocker59 on November 26, 2015, 05:27:04 AM
Swordds, I do the same thing at stops. I don't care so much about the clutch's health as I do my health. Being in gear and having both hands on the controls gives me chance to get out of the way quick when I realize the SUV coming up behind me isn't gonna stop in time. And as Kiwi Roy says, leave an escape path when stopped.


 :1:
Title: Re: Dry vs Wet Clutch?
Post by: Rough Edge racing on November 26, 2015, 05:41:13 AM
 What I know about wet clutches from racing; A dry clutch can transmit about 30 percent more power without slipping than the same type wet clutch. Clutch slip on modified old Birt bikes is a problem. my racer uses cheap Taiwan clutch plates running in a few ounces a ATF and works better the other guys with fancy wet clutches.   Many bikes have wet clutches because the clutch is contained in the primary drive section with gears or chains needing lubrication.
 On old Brit bikes due to transmission design, the rider will always pull in the clutch and kick the bike over to free the wet clutch plates before starting the engine. I don't sit at traffic lights with by manual shift  vehicles or bikes with the clutch disengaged...But... ..At busy intersections I do leave the bike in gear just in case I need to get out of the way in a hurry...
Title: Re: Dry vs Wet Clutch?
Post by: ohiorider on November 26, 2015, 06:56:51 AM

Dry clutches tend to be used on bikes with the crankshaft in line with the frame (Guzzi and older BMW Boxer twins .... although new water-cooled BMW twins use a multiplate wet clutch mounted on front of engine.) I don't drag race my bikes, or do burn outs, so my dry clutches last a long time.  Unfortunately, what has killed two of my Beemer dry clutches is that they didn't stay dry.  The engine rear main seal failed on both bikes, oil saturated the clutch plate, and the clutch began to slip, requiring replacement.  This of course meant removing the swingarm and transmission to access the clutch .... a rather lengthy job.

This vs a multi plate wet clutch which is (a) designed to be run in oil, and (b) if it fails, is easily accessed (usually) by removing the cover on either the right or left side of the engine.

As long as the dry plate clutch doesn't fail, I'm ok with it.  However, when/if it fails, swingarm and tranny must be removed, access provided by 'crabbing' the frame (at least on newer oilhead Beemers.) Don't know from experience if Guzzi frames can be crabbed.
Title: Re: Dry vs Wet Clutch?
Post by: redrider on November 26, 2015, 08:49:35 AM
I have bikes with both and one with a dry running in an oil lubed primary(Norton with all metal plates, sintered bronze and steel) All of them stay in gear when stopped while watching the rear for idiots. Waiting for the train with traffic stacked up behind and we are in neutral. So the situation constantly changes but the only thing constant is the lack of proper care and adjustment. THAT will greatly affect your clutch. FWIW, I replaced the Mille clutch at 140K. Rear main seal wept and since I was in there...
Title: Re: Dry vs Wet Clutch?
Post by: oldbike54 on November 26, 2015, 08:54:22 AM


 Don't know from experience if Guzzi frames can be crabbed.

 Crabbing a Tonti frame makes ME crabby  :cry:

  Dusty
Title: Re: Dry vs Wet Clutch?
Post by: bpreynolds on November 26, 2015, 10:22:16 AM
I have placed a down payment on a 2016 V7-II Stone that should arrive near the end of December or early January but I have some questions regarding how to drive the bike when it arrives.
    - my previous bikes have all had wet clutches.  Standard practice with a wet clutch (at least for me) is to intentionally let it slip when driving slowly and to leave the bike in 1st gear with the clutch disengaged, my left foot on the ground and my right foot on the rear brake pedal while waiting at a stop light, even if waiting for several minutes.  No problem with a wet clutch but will this be hard on a dry clutch?  Do you guys leave the bike in neutral with your right foot on the ground so you can quickly shift into first when the light changes or do you just hold in the clutch lever?
     - why do they call it a V7 Stone?  We're they "stoned" when they were trying to think of a name or does stone mean something in Italian?  And what does the "7" infer?

Swordds, first let me congratulate you here on obtaining a certainly wonderful, gorgeous motorcycle.  I love my V7 like no other ride ever and I'm sure yours will be that much better even.

Second and finally, welcome to the board.  By opening your first post with a mechanical non-issue question, I do fear you may already have too much in common with the geezers on here and will henceforth be a lifetime wg member.   :grin: :thumb: :boozing:
Title: Re: Dry vs Wet Clutch?
Post by: oldbike54 on November 26, 2015, 10:35:04 AM





                                                       "Geezers ?"

  Come on Bipper , no geezers ... oh never mind , even I am not capable of that much bull poopie  :laugh:

  Dusty

 
Title: Re: Dry vs Wet Clutch?
Post by: drums4money on November 26, 2015, 10:39:31 AM
A clutch that is dry when it should be wet will present issues. 
A clutch that is wet when it should be dry will cause similar concern. 

I've always thought that a clutch is best when it's not being actuated.
Title: Re: Dry vs Wet Clutch?
Post by: bpreynolds on November 26, 2015, 10:40:56 AM




                                                       "Geezers ?"

  Come on Bipper , no geezers ... oh never mind , even I am not capable of that much bull poopie  :laugh:

  Dusty

Term of affection, Dusty.  Term of affection. 
Title: Re: Dry vs Wet Clutch?
Post by: 56Pan on November 26, 2015, 10:55:32 AM
I've been riding for almost 50 years and have never been in a situation at a light where I had to "get out of the way quick."  Maybe I've just been lucky.  I was seriously schooled by my father, however, about breaking clutch cables.  You don't want to be stopped, in gear, if that happens (and it did to him on an old Goldstar).  I've had the clutch cable on my new V7 stretch while I was in heavy traffic on a hot day - that's no fun either.  I sit in neutral at lights and try to use the clutch as little as possible.  But that's just me.

Agree big time.  Definitely do not want a clutch engaging in 1st at a redlight.  BTDT, got the T-shirt. Damn near got me killed.
Title: Re: Dry vs Wet Clutch?
Post by: canuguzzi on November 26, 2015, 11:12:46 AM
If you have enough time to worry about your clutch cable snapping at a stop light, you have spent too much time worrying and not enough time enjoying riding.

The short time you might spend at a stop light or stop sign isn't going to make one bit of difference, it the cable snaps or the clutch fails, it was going to do it anyway.

If your cable snaps and you launch into the intersection, obviously you are in lala land and not paying attention.

The clutch was created and designed to be used. Dragging or slipping the clutch excessively is harmful to them, like anything, the operative function here is excessive.

A lot more people get hit from behind at stops than people have clutch cables snap at stop signs or lights.

Anyone worried about a clutch cable snapping or the clutch wearing out hasn't ridden where steep hills exist. Most likely, they've never ridden two up and loaded or been in heavy traffic.

You can buy auto tranny motorcycles, for the clutch operation challenged.

If you want to worry about something, that clunck you hear when putting the trans in gear because you wanted to save your clutch or its cable was the sound of metal hitting metal.

Clutches, like brakes, are wearable items, one day you might have to repair or replace it. Before that time, you will have spent many times that amount changing oil and filters unless you ride very infrequently so as not to get the oil and filter dirty.

Its a clutch not a chastity belt.
Title: Re: Dry vs Wet Clutch?
Post by: oldbike54 on November 26, 2015, 12:08:38 PM
Uhhh....OK.

  NOTHING written on this forum will ever change my riding habits. 

 Even if it was suggested that riding backwards and upside down half of the time would double the life of your motorbike ? :grin:

  Dusty
Title: Re: Dry vs Wet Clutch?
Post by: Kev m on November 26, 2015, 12:22:20 PM
I'm pretty much with Pokey, though I should say I keep my hand on the brakes and I've made the mistake of letting go of the clutch when I wasn't in neutral. The bike doesn't go anywhere, it tries to lurch, then stalls.

As for safety, I watch while keeping my left hand on the clutch lever and left foot literally poised on the shifter. And if anyone isn't slowing fast enough or stopping far enough back I snick it into gear until they are stopped.
Title: Re: Dry vs Wet Clutch?
Post by: Kev m on November 26, 2015, 12:24:48 PM
If you have enough time to worry about your clutch cable snapping at a stop light, you have spent too much time worrying and not enough time enjoying riding.

The short time you might spend at a stop light or stop sign isn't going to make one bit of difference, it the cable snaps or the clutch fails, it was going to do it anyway.

If your cable snaps and you launch into the intersection, obviously you are in lala land and not paying attention.

The clutch was created and designed to be used. Dragging or slipping the clutch excessively is harmful to them, like anything, the operative function here is excessive.

A lot more people get hit from behind at stops than people have clutch cables snap at stop signs or lights.

Anyone worried about a clutch cable snapping or the clutch wearing out hasn't ridden where steep hills exist. Most likely, they've never ridden two up and loaded or been in heavy traffic.

You can buy auto tranny motorcycles, for the clutch operation challenged.

If you want to worry about something, that clunck you hear when putting the trans in gear because you wanted to save your clutch or its cable was the sound of metal hitting metal.

Clutches, like brakes, are wearable items, one day you might have to repair or replace it. Before that time, you will have spent many times that amount changing oil and filters unless you ride very infrequently so as not to get the oil and filter dirty.

Its a clutch not a chastity belt.

Boy sometimes you spout a mixture of vitriol and nonsense that makes me wonder if you're cranky or crazy.

But maybe we ask get a little cranky or crazy sometimes.
Title: Re: Dry vs Wet Clutch?
Post by: oldbike54 on November 26, 2015, 12:34:22 PM
 Isn't tryptophan is sedative ? Let's play nice boys , it is thanksgiving .

  Dusty
Title: Re: Dry vs Wet Clutch?
Post by: 56Pan on November 26, 2015, 01:04:51 PM
If you have enough time to worry about your clutch cable snapping at a stop light, you have spent too much time worrying and not enough time enjoying riding.

The short time you might spend at a stop light or stop sign isn't going to make one bit of difference, it the cable snaps or the clutch fails, it was going to do it anyway.

If your cable snaps and you launch into the intersection, obviously you are in lala land and not paying attention.

The clutch was created and designed to be used. Dragging or slipping the clutch excessively is harmful to them, like anything, the operative function here is excessive.

A lot more people get hit from behind at stops than people have clutch cables snap at stop signs or lights.

Anyone worried about a clutch cable snapping or the clutch wearing out hasn't ridden where steep hills exist. Most likely, they've never ridden two up and loaded or been in heavy traffic.

You can buy auto tranny motorcycles, for the clutch operation challenged.

If you want to worry about something, that clunck you hear when putting the trans in gear because you wanted to save your clutch or its cable was the sound of metal hitting metal.

Clutches, like brakes, are wearable items, one day you might have to repair or replace it. Before that time, you will have spent many times that amount changing oil and filters unless you ride very infrequently so as not to get the oil and filter dirty.

Its a clutch not a chastity belt.

Wasn't a snapped cable with me.  Leather friction disc on an HD foot clutch got wet and the rocker flipped over at a busy intersection.  No, it's not something I lie awake at night worrying about.
Title: Re: Dry vs Wet Clutch?
Post by: bpreynolds on November 26, 2015, 01:05:30 PM
Isn't tryptophan is sedative ? Let's play nice boys , it is thanksgiving .

  Dusty

I think tryptophan is an additive.  Let's talk oil.   :wink:
Title: Re: Dry vs Wet Clutch?
Post by: Scott of the Sahara on November 26, 2015, 03:02:22 PM
I always try to find neutral at a stop light. This saves me from starting in 2nd
Title: Re: Dry vs Wet Clutch?
Post by: canuguzzi on November 26, 2015, 06:43:12 PM
Boy sometimes you spout a mixture of vitriol and nonsense that makes me wonder if you're cranky or crazy.

But maybe we ask get a little cranky or crazy sometimes.

Just trying to fit in with the rest if the crazies and crankies. :evil:
Title: Re: Dry vs Wet Clutch?
Post by: cleatusj on November 26, 2015, 08:54:06 PM
I just feel lucky when I can find neutral any time that the engine is running.
Title: Re: Dry vs Wet Clutch?
Post by: Muzz on November 26, 2015, 09:23:30 PM
I've been riding for almost 50 years and have never been in a situation at a light where I had to "get out of the way quick."  Maybe I've just been lucky.  I was seriously schooled by my father, however, about breaking clutch cables.  You don't want to be stopped, in gear, if that happens (and it did to him on an old Goldstar).  I've had the clutch cable on my new V7 stretch while I was in heavy traffic on a hot day - that's no fun either.  I sit in neutral at lights and try to use the clutch as little as possible.  But that's just me.

That's me 3.

I throw it in to first at the last minute as the Thorington bearing that sits at the back of the gearbox only has the amount of lube (read grease there) that it was assembled with. Although it is designed to take thrust my view is the less load the bearing has to endure the longer it will last.

To back up the previous post, I was sitting at the lights many years ago with lever pulled in an sitting in first on my Matchy single. Got hit from behind by a car, the bike reared up and leapt in front of a bus and I was left flat on my back observing the underneath of a Wolseley 6/80 radiator. :rolleyes:  Never left the bike engaged in gear at the lights since.
Title: Re: Dry vs Wet Clutch?
Post by: Kev m on November 26, 2015, 10:35:32 PM
Just trying to fit in with the rest if the crazies and crankies. :evil:

Fair enough my friend, fair enough...
Title: Re: Dry vs Wet Clutch?
Post by: bigbikerrick on November 27, 2015, 04:23:13 PM
Sorry to burst your bubble, but....YES problem for a wet clutch or any clutch.
You shouldnt sit at a standstill with ANY clutch wet or dry for extended periods of time. All you are doing is glazing up the clutch friction plates,heating up the steel plates and loading up the throwout bearing and gearbox input shaft bearing and on a wet clutch heating up and putting friction material into the oil.
Any time you have the clutch disengaged for anything other than selecting gears or smoothing out the drive while riding slowly in traffic is a negative. Obviously the latter isnt exactly great but its less harmfull than bunny hopping along.
Any clutch is at its happiest when fully engaged.
Ciao

     

Exactly, what I have always thought, Lucky Phil . Well Stated!
Rick.
Title: Re: Dry vs Wet Clutch?
Post by: charlie b on November 27, 2015, 05:28:17 PM
Here's another vote for putting the bike in neutral at a stop.  I do the same with cars.

Yes, if it is a short stop I will leave it in gear.

Yes, I have used a clutch on many, many hills.  That's where the foot brake is great and why I like handbrakes on a car that has a manual tranny.

And yes, I have over heated a clutch by leaving it in gear on a long stop.  The intermediate disk warps and then it just gets worse from there.  I had not checked the clutch adjustment in a long time but it seemed fine.  Now days I take out almost all the slack in the clutch cable (adjust per my Guzzi manual).
Title: Re: Dry vs Wet Clutch?
Post by: MGPilot on November 27, 2015, 06:18:08 PM
Obviously, you can do it any way you want.

But...if your clutch is adjusted properly, leaving it in gear and holding the clutch in fully (clutch fully disengaged; handle down all the way) should make No Difference in the wear of the plates, their temperatures, glazing, etc.  That's the point of disengaging the clutch!

A point of terminology, "slipping the clutch" generally refers to a partially released clutch. That's what you do to get going or to go slower than the engine would allow. A few dolts slip their clutch rather than use a brake which will dramatically wear the clutch, increase temperatures, etc. That's not the same as a fully disengaged clutch.

You should not be at a light, slipping the clutch (with wet or dry clutches). Just have your right foot on the brake and your clutch fully engaged.

The Motorcycle Safety Foundation recommends leaving the transmission in gear. This gives you the chance of being able to pull out to avoid a reckless driver. They figure that the time it takes to get the transmission in gear, and then try to avoid the accident might be enough to determine whether you're hit or not.

Modern, sealed bearings are pretty dam good. The amount of stress on a factory standard throw-out bearing for a small displacement engine meant for the street is modest. These are not super duty racing assemblies. It is true that the best position for a clutch is fully engaged.

Were you do to a lot of slow speed driving (so slowly that you can't fully engage the clutch), wet plates seem to have an advantage over dry plates.

But they are the same, sitting at a light while the transmission is in gear--as the plate (in the case of the V7) will be separated from the flywheel. The only stress is on the throw-out bearing which was sized and designed to take it.
Title: Re: Dry vs Wet Clutch?
Post by: ohiorider on November 27, 2015, 06:39:17 PM
Here's another vote for putting the bike in neutral at a stop.  I do the same with cars.

Yes, if it is a short stop I will leave it in gear.

Yes, I have used a clutch on many, many hills.  That's where the foot brake is great and why I like handbrakes on a car that has a manual tranny.

Yeeessss!  I developed the habit of holding the handbrake with the button depressed while sitting on an uphill grade waiting for traffic to move (or the light to change.)  Started doing that with my first VW, a 1959 Cabriolet, body by Karmann.  Still do it today with my Mazda6 V6 with stick shift.

It's a simple coordination, to release the handbrake as you engage the clutch. And saves a lot of wear and tear on the clutch.

On to bikes: Several years ago, we pulled up to a stop sign on our bikes on a rather steep uphill grade.  As always, I use the rear brake to hold me on an uphill stop as I release the clutch.  A riding companion didn't do the same, and found himself starting to slide backwards.  Why?  Most of the weight was off the front tire, and he was attempting to hold the bike on the uphill grade with the front brake.  Yep, the brake worked, but the lightly-loaded tire began slipping, and the bike began rolling backwards.

Well, since he knew most everything about everything, the problem (from his standpoint) was blamed on the bike's ABS system.  Of course!  We don't spend too much (no) time riding together anymore.
Title: Re: Dry vs Wet Clutch?
Post by: charlie b on November 28, 2015, 09:28:00 AM
FWIW, on a multiplate clutch there is always the possibility of contact between the surfaces when the clutch is disengaged.  There is nothing in the mechanism that forces the intermediate disc and friction discs to separate.  There will be some friction.

On a single plate clutch, like on most cars, the mechanism separates the friction disc and the flywheel, no contact at all.
Title: Re: Dry vs Wet Clutch?
Post by: Triple Jim on November 28, 2015, 10:00:30 AM
FWIW, on a multiplate clutch there is always the possibility of contact between the surfaces when the clutch is disengaged.  There is nothing in the mechanism that forces the intermediate disc and friction discs to separate.

The Kawasaki triples had wavy springs between the clutch plates to separate them when disengaged.  I don't know how many other multiplate wet clutches had similar spings, but I assume at least some.

But even without separating springs, incidental contact with nearly no pressure isn't likely to cause glazing or any other problem.