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Thread: 48 FL Clutch - too many plates?

  1. #1

    Default 48 FL Clutch - too many plates?

    Hi Guys

    Whilst the engine now works, and the gears and clutch seemed to work 'in the shed', I decided to check the clutch by dismantling it. All the parts appear in very good condition, but there are too many steel plates (5), none of these have buffers (38025-41), too many friction plates (5) and no spring plate (37950-41).

    I'm not sure of the function of the buffers or the spring plate, so is this a problem, or should it all work?

    Thanks

    GregIMG_2129.JPGIMG_2130.JPG

  2. #2
    Join Date
    Aug 2004
    Location
    Beautiful Northern New Mexico
    Posts
    2,766

    Default

    The standard clutch was changed in '68 from 3-1/2 plates to 5 plates and the spring plate went away. It is common to find the upgrade in an early bike. However there should only be 4 steel plates, not 5. The first friction disc runs directly on the clutch drum and the last one directly on the pressure plate with a steel disc between each friction disc. I use 5 plate clutches in all my old stuff because I like them. The buffers help slightly with noise but are not needed for function, it works fine without them and many aftermarket steel plates come without them.
    Robbie Knight Amca #2736

  3. #3

    Default

    E88CBD49-0136-49AB-9AE4-324D6E229455.jpgC97116C1-F7BE-48FC-BF7E-5CE4C7E25717.jpgC97116C1-F7BE-48FC-BF7E-5CE4C7E25717.jpgHi, definitely 5 steel, 6 friction, do you think this could be a problem and should I revert to 5 steels?
    Thickness of current pack is 1 9/16”.
    Picture shows full nest in clutch which is big enough to support all 13 plates?
    Thanks
    Last edited by harleygreg; 10-06-2019 at 05:36 AM.

  4. #4
    Join Date
    Jul 2010
    Location
    Ohio
    Posts
    673

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    Too many plates. I believe the less weight the better on pre '65 with no primary brg. support. Less weight equals less main drive bearing and bushing wear in my opinion.
    Bob Rice #6738

  5. #5
    Join Date
    Mar 2007
    Location
    Racine WI
    Posts
    44

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    Greg, it also looks to me that the nuts are on backwards. The notch in the nut should align with the bump on the pressure plate to keep them in adjustment. The nuts will sit flat against the pressure plate when turned around.

    Curly

  6. #6

    Default

    Thanks Curly

  7. #7
    Join Date
    Nov 2018
    Location
    Lowell,ma
    Posts
    24

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    I’m a little late to this thread . Just want to let you know if you run the clutch dry like me (belt) the steels w/out buffers will Ching-a-Ching-a-ling when disengaged. Not a problem of course but annoying after a while. Sounds like Santa is coming. There is after markets with the buffers out there.found mine at a swap meet in ct. peace at last ! Useless info, dry clutch ducati’s Sound the same

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