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82 XJ650 Carb Diaphragms

Discussion in 'XJ Technical Chat' started by colehole, Jan 24, 2013.

  1. colehole

    colehole Member

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    Hey guys I just got my carbs for my bike finally, pulled them apart to start cleaning and found the diaphragms in this shape. The rubber is a bit dried out but no holes.... Are they usable?
     

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    colehole, Jan 24, 2013
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  2. quebecois59

    quebecois59 Well-Known Member

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    I would spray them generously with silicone lube and put them in a tightly closed can (large enough so they don't squeeze each other) for a couple of days, then you'll see if they are more souple and usable.
     
    quebecois59, Jan 24, 2013
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  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    XJ4Ever offers a carb diaphragm "rejuvinator" compound that works quite well:

    HCP8540 Aftermarket carb diaphram rubber RnR FLUID. Dissolved and chlorinated paraffin wax is the best (and perhaps the only) way to safely bring some life back into stiff, worn rubber material... such as that found in those all-important carb piston diaphrams. Years of hard life inside of your carb take their toll, and whenever your carb is apart for service, and generous application of this product will help to clean, maintain, and restore the flexibility, while prolonging their usable service life. 10cc dripper bottle contains enough fluid to do about eight diaphrams. Simple to use, spread on, wait a few seconds, wipe off, repeat and you're done!
     
    bigfitz52, Jan 25, 2013
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  4. quebecois59

    quebecois59 Well-Known Member

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    No offense to bigfitz recommendation, but I remember that the last time I had to deal with shrunk diaphragms, I soaked them in fresh gasoline for a few days and they came back to normal dimensions.Gasoline would do no harm, but if it doesn't work properly for you, then the product bigfitz recommended will obviously do the trick.

    Silicone spray is good for long term storage indoors (I mean in the basement), because it virtualy smells nothing, so your wife won't notice it...
     
    quebecois59, Jan 25, 2013
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  5. colehole

    colehole Member

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    Thanks for the tips guys! I think I'll try soaking in gas first since I have that in the garage right now. If I can't bring them back to life, have any of y'all ever dealt with these? http://jbmindustries.com/HITACHI.html I'm on a pretty tight budget so just replacing the rubber and not the whole assembly is definitely the better route for me if possible.
     
    colehole, Jan 25, 2013
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  6. cds1984

    cds1984 Well-Known Member

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    cds1984, Jan 25, 2013
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