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Post by scania on Nov 21, 2014 1:40:22 GMT
I was just wondering can anyone explain to me why motorcycles mostly have wet clutches. Cars and vans have dry clutches which are a pig of a job to change because of the the difficulty getting access to them.
If bikes had dry clutches then changing a clutch would be a breeze, why then do bikes have wet clutches when this requires removing oil sealed covers and gaskets which is messy? Is there some think I don't get here? , What is the advantage of a wet clutch? |
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Post by baldgrimsbybiker on Nov 21, 2014 5:55:05 GMT
I have a BMW R1100RT with a dry clutch and to change it I need to separate the gearbox from the engine , same as a car. Sounds easy until you realise I need to strip off the entire rear frame section just to get at it. Most wet clutches are accessible via a removable engine cover which is so much easier than the bear of a task I have.
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Post by jonnyboy on Nov 21, 2014 9:49:23 GMT
I thought it was because the plates will last longer on smaller sized clutches as against car sized plates, although some motorcycles have dry ones.  |
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Post by Deleted on Nov 21, 2014 9:52:35 GMT
And yet some people still believe car oil does a wet clutch no harm? Beggars belief. But let's not have a huge row about oil....  |
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Post by scania on Nov 21, 2014 19:20:09 GMT
And yet some people still believe car oil does a wet clutch no harm? Beggars belief. But let's not have a huge row about oil.... Reminds me of that poster with model Kim Kasanger (or what ever her name is) with her bum well oiled. The caption says," The Americans are thing of invading to liberate all the oil, put they may forget to withdraw"
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Post by Deleted on Nov 21, 2014 19:41:14 GMT
If I drove an Austin Allegro at 56mph down the M4 near Maidenhead at approximately 6:00pm on the 15th November 1986 and the heavens have opened (and I mean really opened) - then does this also make the vehicle have a wet clutch in some respects? Much like a motorcycle, say.....
Or am I being totally stupid and irrelevant?
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Post by Deleted on Nov 21, 2014 19:41:53 GMT
I would need to see this poster before commenting.....
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Post by scania on Nov 21, 2014 21:03:00 GMT
If I drove an Austin Allegro at 56mph down the M4 near Maidenhead at approximately 6:00pm on the 15th November 1986 and the heavens have opened (and I mean really opened) - then does this also make the vehicle have a wet clutch in some respects? Much like a motorcycle, say..... Or am I being totally stupid and irrelevant? The Allegro would break down with water on the coil before the clutch would get saturated. |
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Post by Deleted on Nov 21, 2014 21:06:15 GMT
Possibly right. You have owned one (I can tell). |
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Post by scania on Nov 21, 2014 21:19:14 GMT
Possibly right. You have owned one (I can tell). Austins were very popular in Ireland at one time and were good enough until Toyotas and other Japs arrived.
Then we were all expected to work longer hours because it wasn't necessary to factor in break down time travelling to and from work, so in the long run we have more reliable cars but we are worse off.
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Post by rich on Nov 24, 2014 15:48:33 GMT
look up 2 x muwwww x w x r...........where mewww is the coefficient of friction of the "clutch " and r the mean radius and w the spring or clamp weight or pressure...........why 2?? cos a car usually has 2 side to the friction plate.....and sd will have..........I've lost count.
so a smaller dia plate etc........but in oil?? or rather an oily environment??.....more gaskets and seals and bearings etc etc ....for a dry clutch, or mount on the g/box output shaft subject to chain lube ( gilera 175.....1960's ) ...........
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Post by rich on Nov 25, 2014 10:02:47 GMT
whilst doing my mandatory work experience on maggies farm, which I enjoyed from day one, I was given a book about Harley Davidson, very interesting read particularly about there beginings.......anyways, early Harleys had a clutch in the rear wheel............and at some of there national meets ( spring and the fall ) they have a jet engine especially for "melting Honda's" with the exhaust.........I'd like to go to one of there meets on an sd and see what happens!
my bro has a WLC 750 sv.
my dad said that there is a field in stafforsdshire which was dug up after the war, all sorts of vehicles driven in ( including loads of Harley he said ) and buried!! |
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Post by scania on Nov 26, 2014 20:06:22 GMT
look up 2 x muwwww x w x r...........where mewww is the coefficient of friction of the "clutch " and r the mean radius and w the spring or clamp weight or pressure...........why 2?? cos a car usually has 2 side to the friction plate.....and sd will have..........I've lost count.
so a smaller dia plate etc........but in oil?? or rather an oily environment??.....more gaskets and seals and bearings etc etc ....for a dry clutch, or mount on the g/box output shaft subject to chain lube ( gilera 175.....1960's ) ........... ********************************************************************************************************* Most of that flew over my head. I figure that muwww is the sound a cat makes when it wants to be fed. Now cats drink milk but milk makes them Sku**er, but milk does not make a good lubrication for a motorcycle engine even though milk gives me oily skin and makes my bald head shine. Also cats do not ride motorbikes, cats chase rabbits. Seals swim up in the artic and are full of oil which makes them very slippery, but the ice is also slippy, so seals on ice is very slippy, polar bears eat seals. Do you follow me on this?
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