C: Clutch Series ‘C’ Rapide Clutch Slip

danno

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Non-VOC Member
There's three on the front stand plates labelled C and 2 x D on the drawing above and L is up behind the gear change cover but not inside, accessible from underneath/in front ( I've just been and checked)
Ok thanks.
There’s also 3xG, 1xJ, H, K around the clutch area on the diagram. I see that these are hex shape unlike the others so not sure if they are accessible or need to be checked for tightness.
 

Bill Thomas

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Just re read this Posting,
Is there a local Section you could go to ,
I know these Vincent's are tricky, Might be good for a local bit of help ?,
Plus you could see what other Owners have done.

Might be worth looking into engine Breathing ?,
The standard one is not a lot of good,
And don't use too thin an engine oil ?,
In fact the later "D" Vincent changed the breathing,
I have just done a simple Car breather on the front exhaust adjuster cap,
Some don't like the looks of it but it's cheap and works,
The standard setup will always drop a bit if the pipe goes down,
I like any outlet pipe to go up first.

But if you change the breathing , Best to block the standard one off with a Drain plug,
Like the one used on your engine.
 

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Bill Thomas

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Not sure where that is.
On a Twin , Just in front and below the Barrel,
Above the Magneto there is a small pipe going down, It is timed by an opening in the breather spindle ,
When it lines up with a slot in a tube that is turned by the Breather gear ,
On a Twin it's the gear that turns the Automatic Timing devise, ATD,
It has to be timed right , But to me it is not a good idea,
As I said the "D" 1954/5 changed to a pipe off the front Valve spring cap,
But the inside of the Cylinder Head is different on a "D".
So much to learn, Some not easy for me to put into words.
 

Bill Thomas

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I don't know about you, But I have always found it hard reading about something,
I was a Motor Cycle Mechanic , Then a Car Mechanic for most of my life,
I have to have something in bits !, In front of me , Then have a read !, To make much sense of it !,
And Vincents are very different to most Bikes.

I also find the newer Parts photos are harder to understand, For some reason,
Maybe just Me.

Some of the through studs on Twin cases, One end is just threaded into the case,
Does not go all the way through !,
The nuts are got to, From inside the gear selector case ?.
 

danno

Well Known and Active Forum User
Non-VOC Member
On a Twin , Just in front and below the Barrel,
Above the Magneto there is a small pipe going down, It is timed by an opening in the breather spindle ,
When it lines up with a slot in a tube that is turned by the Breather gear ,
On a Twin it's the gear that turns the Automatic Timing devise, ATD,
It has to be timed right , But to me it is not a good idea,
As I said the "D" 1954/5 changed to a pipe off the front Valve spring cap,
But the inside of the Cylinder Head is different on a "D".
So much to learn, Some not easy for me to put into words.
Thanks, I'll look into this.
Might have something to do with the oil leaks that appear after a ride.
There's always one or two running down on the mag cover.
 

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Bill Thomas

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Dan' Those oil leaks on the outside of the mag cowl are not from the breather,
The wind does funny things with oil leaks,
The breather pipe goes down from that Alloy Hexagon top left.

The oil may be coming out the exhaust pipe , From the lower valve guide in the cylinder head ?,
Or from the the cylinder head joint, Or even from the top of the cylinder head,
Where the oil returns via the rocker feed pipes,
So many things it could be.

Sometimes ?? Vincents wet sump,
After a layoff , Oil drains down inside of the engine ,
Then the owner looks in the oil tank , See's it low and puts more oil in !,
But after starting, The oil pump pumps the extra oil back into the tank and overfills the tank,
Which then leaks out the filler cap all down the sides of the Oil tank / Upper Frame Member ,
All over the engine !.

Sorry, You may know this,
But if we find the engine oil low after a layoff, We drain the sump ,
The sump is called a dry sump, But there is always a small cup full of oil in there !,
The engine drain bung is in a round cutaway in the left " Sitting on the bike ",
Front prop stand holding plate,
It has been known to get a few PINTS out of there !,
So get a big tin underneath.

Normaly you should just see a metal bar about 3 .1/2 " Down the oil tank filler hole,
That's what I use as to the highest I want the oil level to be.
 
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