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Carburetor Vacuum Diaphragm

Discussion in 'XJ Technical Chat' started by Andy Dobkins, Mar 20, 2021.

  1. Andy Dobkins

    Andy Dobkins Member

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    Got a question I have seen on Amazon ,Ebay and a few other sites .Like this
    labwork Pack of 4 Carburetor Vacuum Membrane Diaphragm and wondering if any one has used them looks like all of them go on the same way. Even from JBM Industries I cant see any difference . Through I would
    ask and see what has been used
     
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    jbm are a suitable substitute.
    you can go direct to their web site he is starting to list what fits xj's
     
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  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The differences that you can't see will be what matters. I've not used them, but what rubber is used matters a lot. The JBM diaphrams are known to work.
     
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    our supporting vender sells oem and aftermarket diaphrams too.
     
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  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    this does concern me for the ;abwork
    Item model number XJ550 XJ650
    Manufacturer Part Number XJ550 XJ650

    I will check in morning if a 550 and 650 will swap I dont think thay are the same size.
     
  6. Andy Dobkins

    Andy Dobkins Member

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    Was just trying to save a few on a fixed income. 1 had a hole in it fixed it last year but noticed engine not running right pulled carbs off and the liquid tape came off need to replace shaft seals so was going to strip down break rack and now that I got an Ultrasonic cleaned an a cheap soda blaster I could do a good job on rebuilding them. right now 100 bucks is a lot.
     
  7. Andy Dobkins

    Andy Dobkins Member

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    this is a air cold xj 700n maxim with Hitachi HSC33
     
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  8. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    They are absolutely NOT the same size nor fit!
     
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  9. XJ550H

    XJ550H Well-Known Member Premium Member

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    i did not think they were thanks for the reply.
     
  10. XJ550H

    XJ550H Well-Known Member Premium Member

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    you should add your bike to your signiture line thanks for the clarification
     
  11. Jetfixer

    Jetfixer Well-Known Member

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    There is a way to repair small holes in diaphragms, don't laugh a trojan condom cut a piece slightly larger than hole overlap by an inch all around , use rubber contact cement apply on both diaphragms and patch put it in place and let it set up for an hour or so you could also put a patch on the opposite side of hole as well . I once had an 82 Virago and was on the Vrago forum and this was a tip I picked up , several members said this worked for them , definitely cheaper than buying a new diaphragm.
     
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  12. a100man

    a100man Well-Known Member

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    I hesitate to ask but what's a 'trojan' condom?
     
  13. Jake750

    Jake750 Member

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    Just a popular brand of condom in the US. I dont think there's anything special about the material compared to other brands.
     
  14. Franz

    Franz Well-Known Member

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    Just don't say they are for carburettors :D
     
  15. a100man

    a100man Well-Known Member

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    Phew. Not just for use by ancient Greek warriors then?
     
  16. XJ550H

    XJ550H Well-Known Member Premium Member

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    my concern is they are latex and do not play well with petroleum products.......
     
  17. Andy Dobkins

    Andy Dobkins Member

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    If I use a trojan condom cut a piece of and use it on my bike going to start howl going down the road ? Or get all horny at the next bike that goes by and do wheelies just asking to be ready?
     
  18. XJ550H

    XJ550H Well-Known Member Premium Member

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    I had 1 bike in the garage then 2 and all of a sudden it jumped up to 10 should have gone the trojan route.....:eek:
     
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  19. a100man

    a100man Well-Known Member

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    I'm afraid that prompts more questions than answers - an Otter??

    On second thoughts I think I prefer to remain in ignorance
     
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  20. JCH

    JCH Active Member

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    What symptom's do you notice when you have a torn diaphragm ?
     

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