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C: Clutch Clutch Problem


Batman11

Website User
Non-VOC Member
Hi . After some advice fitted a rebuilt clutch to my Rapide. All fitted well but I can not get clutch to slip to engage gear when pulling in clutch. Even if I wind adjuster right in so single clutch plate is not even contacting i cannot get rear wheel to spin. My only thought is maybe push rod is to short and not poking out off shaft enough? My Email is Warwick@satco.co.nz
 

Bill Thomas

Well Known and Active Website User
VOC Member
I replaced the Bushes and Oil Seal in the Big Chain wheel, A while ago, Lucky I had one of my feelings !, And checked for End Float, There was none, Had to Grind down with Wet and Dry paper.
There are other things to check, But one thing at a time. Cheers Bill.
 

Bill Thomas

Well Known and Active Website User
VOC Member
The shoe carrier boss, Goes inside the big chain wheel, If there is no end float, When you do the big clutch nut up, The one with the spring that acts as a locking device, It will lock the whole thing up,= Not Good !.
You could undo the nut a turn and just try it.
To fix it , The chain case will have to come off, Take the big chain wheel off, And push the shoe carrier inside, Then put a straight edge across the end of it, While holding it in your hand, It needs to spin free.
Good Luck, Bill.
 

Batman11

Website User
Non-VOC Member
The shoe carrier boss, Goes inside the big chain wheel, If there is no end float, When you do the big clutch nut up, The one with the spring that acts as a locking device, It will lock the whole thing up,= Not Good !.
You could undo the nut a turn and just try it.
To fix it , The chain case will have to come off, Take the big chain wheel off, And push the shoe carrier inside, Then put a straight edge across the end of it, While holding it in your hand, It needs to spin free.
Good Luck, Bill.
For some reason I have limited access to view diagrams like the one above
You wouldn’t be able to email to me
Warwick@satco.co.nz
Thanks
 

Bill Thomas

Well Known and Active Website User
VOC Member
Maybe I am getting in too deep !.
Can you tell us what you have fitted and why ?, And was it OK before.
It could be as simple as the end float just behind the big nut, Stopping the shoes from letting go of the drum ?.
 

Attachments

Batman11

Website User
Non-VOC Member
Maybe I am getting in too deep !.
Can you tell us what you have fitted and why ?, And was it OK before.
It could be as simple as the end float just behind the big nut, Stopping the shoes from letting go of the drum ?.
Ok so old clutch needed refurbish-basically worn
So bought one off ebay uk all refurbished
Fitted up all ok except as explained
Shoes are free to move
 

Bill Thomas

Well Known and Active Website User
VOC Member
Right, So you have not changed the the shoe carrier, ?.
If the push rod was too short, It would not lift the outer plate ?.
Send us a photo of what you have changed
 

Batman11

Website User
Non-VOC Member
Right, So you have not changed the the shoe carrier, ?.
If the push rod was too short, It would not lift the outer plate ?.
Send us a photo of what you have changed
Yes but if the push rod was say flush with end of shaft then the adjuster would push against end of shaft?
I have replaced as a complete assembly all in the illustration you sent me
 

Bill Thomas

Well Known and Active Website User
VOC Member
But you said you wound the adjuster in so that the outer plate is free, Sorry, I might not be understanding.
If you changed the lot on the shoe carrier, We could be back to what I first said.
If you undo the nut, A small bit, Just for a quick test, With out riding the BIke !!!.
If it works OK, I would rebuild the the new clutch onto the OLD shoe Carrier.
 

Batman11

Website User
Non-VOC Member
But you said you wound the adjuster in so that the outer plate is free, Sorry, I might not be understanding.
If you changed the lot on the shoe carrier, We could be back to what I first said.
If you undo the nut, A small bit, Just for a quick test, With out riding the BIke !!!.
If it works OK, I would rebuild the the new clutch onto the OLD shoe Carrier.
Ok I will try your suggestion.Thanks for your input
 

peter holmes

Well Known and Active Website User
VOC Member
I am really surprised that no one has suggested joining the Club, that you are already dipping into, NZ is very well supported, I am sure with a little effort from yourself someone would take a look at it for you, it is so hard to solve mechanical problems from vague descriptions, and purchasing from eBay is no guarantee that all the parts are fit for purpose and well adjusted, I personally favour original clutch parts that have been professionally refurbished than purchasing newly manufactured parts, your original post is difficult to fully understand, you state that you are unable to get the clutch to slip so that you can engage a gear, but the last thing you want is slip, what you want is total disengagement of the clutch to enable full engagement of the gears, that is how all clutches work, really, join the Club and put the feelers out for some friendly help.
 

Batman11

Website User
Non-VOC Member
I am really surprised that no one has suggested joining the Club, that you are already dipping into, NZ is very well supported, I am sure with a little effort from yourself someone would take a look at it for you, it is so hard to solve mechanical problems from vague descriptions, and purchasing from eBay is no guarantee that all the parts are fit for purpose and well adjusted, I personally favour original clutch parts that have been professionally refurbished than purchasing newly manufactured parts, your original post is difficult to fully understand, you state that you are unable to get the clutch to slip so that you can engage a gear, but the last thing you want is slip, what you want is total disengagement of the clutch to enable full engagement of the gears, that is how all clutches work, really, join the Club and put the feelers out for some friendly help.
Yes that’s what I ment-disengagement to get engagement.Thanks
 

Bill Thomas

Well Known and Active Website User
VOC Member
I think I might need c19.The shim ?
The shim is there to take up too much slack, You want about 20 thou gap, But there must be a good endfloat,
Or the shoes won't be free to move back and forth, When the nut is tight.
 

peter holmes

Well Known and Active Website User
VOC Member
A C19 in a very necessary component, but it will not solve the problems that you have, the C19 shim is available in various thicknesses to get the desired amount of end float to enable the clutch plate carrier to rotate freely when disengaged, in my experience the thickest shim will more that likely lock up the clutch making gear changes impossible.
 

Bill Thomas

Well Known and Active Website User
VOC Member
I am thinking the new shoe carrier is a little shorter than your old one,
Which would give you the same problem I had because the new bushes PD24 and PD22 were too thick.
 

Attachments

Bill Thomas

Well Known and Active Website User
VOC Member
Have a look and see if your spring plungers are sitting on the right locations and the arrows are right way round.
 

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Gary Gittleson

Well Known and Active Website User
VOC Member
The Vincent clutch is a complicated item. It's not clear what is meant here by "a rebuilt clutch". What was included? I suppose one could do the obvious things; slap it on, properly adjust the cable and release mechanism and hope for the best. But just bolting up a "foreign" clutch assembly doesn't seem likely to give good results. I suggest taking a look at http://www.thevincent.com/vinclut.htm
Search the page for "Clutch Thy Beast". All the points such as end float mentioned in this thread are covered there. I followed the entire procedure with great success. The clutch doesn't slip, remains dry and reliably releases.

And yes, join the club!
Gary
 

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