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Falcone Clutch Button Bearing Modernization

Discussion in 'MonoCylindrico' started by GT-Rx®, Jul 27, 2014.

  1. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

    Jul 1, 2009
    Likes Received:
    Thanks to Patrick Hayes:

    Last week Bill Irwin floated the idea of replacing the crude, loose-ball clutch throwout bearing with something technologically superior. He tweaked my imagination and directed me to some commercially available captive balls and races.

    This represents a few hours of lathe work while I figured out techniques and dimensions and sequencing the various procedures.

    FalconeBrng3-PH.jpg FalconeBrng2-PH.jpg FalconeBrng1-PH.jpg

    The captive balls and grooved race washers are commercially available and made from 52100 chrome steel. I fabricated the support piece and the cover cup out of stainless.

    Runs smooth as silk. It has to last much longer than the stock bits.

    I wanted to make a "double cup" affair like the stock bearing but there isn't enough room available unless I make VERY thin wall cups. I think this overlap between the cup and the support will be enough to retain grease adequately.

    These caged balls and races are nominal 14mm OD. There is an alternate brand available at 13mm OD and that would allow for thicker walls and the possibility of true, double-cup overlap.

    Either way, the bearing is not sealed and will always need periodic attention to replace the grease as it gradually oozes out.

    BTW, as an aside. Regardless of what bearing you use, when your clutch cable snaps, the clutch lever arm flops outward and the entire bearing system goes bounding down the road. Many of my Italian friends use a loose zip tie on the clutch arm so that the arm can't flop away if the cable breaks. At least you don't lose the bearing. I'll try to get a picture. Always carry a spare bearing AND a spare cable.

    Patrick Hayes
    Fremont CA
  2. Chris R

    Chris R Cruisin' Guzzisti

    Nov 10, 2008
    Likes Received:
    Nice job Patrick! If you made some spares I'll happily buy one.
  3. lomax

    lomax Cruisin' Guzzisti

    Mar 9, 2013
    Likes Received:
    Westminster, CO
    Old thread but as I just got one of these I am doing some research. It would be most welcome to find out where to get a bearing setup like this, or even a stock spare to carry with the bike. A spare cable would be a good addition also. I like the idea of somehow making the clutch arm captive if the cable breaks. I will look into that.

    Thanks for all you do.


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