1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Pl;astic Thingies

Discussion in 'XJ Technical Chat' started by TECHLINETOM, Dec 11, 2007.

  1. TECHLINETOM

    TECHLINETOM Member

    Messages:
    282
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    Deerfield OH
    My 82 XJ1100 Maxim has these plastic thingies between the fins. What are they? Are they important? I would like to remove them as some are missing but if they serve an important function i will try to replace them.

    My current theories are:
    1. They dampen vibration to make the machine quieter. OR..
    2. They support the fins to prevent breakage.

    Help me O Gurus of the XJ ( and XS ) world!
     
    TECHLINETOM, Dec 11, 2007
    #1
  2. Oldgoat

    Oldgoat Member

    Messages:
    115
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Montreal
    #1
     
    Oldgoat, Dec 11, 2007
    #2
  3. Altus

    Altus Active Member

    Messages:
    1,489
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    London, Ontario
    Actually it's #1 AND #2 -- they do both.
     
    Altus, Dec 11, 2007
    #3
  4. TIMEtoRIDE

    TIMEtoRIDE Active Member

    Messages:
    4,686
    Likes Received:
    11
    Trophy Points:
    38
    Location:
    Clermont FL near Orlando
    I'd say it's safe to remove them for cosmetic reasons, you won't hurt your engine--I;m leaving mine alone.
     
    TIMEtoRIDE, Dec 11, 2007
    #4
  5. MGM8675309

    MGM8675309 Member

    Messages:
    164
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Fort Worth, Texas
    always wondered what those were for 8O
     
    MGM8675309, Dec 11, 2007
    #5
  6. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    The technical reason is "Noise and Vibration Dampening"

    The noise it Dampens is a inaudible High Frequency Harmonic that causes fatigue when exposed to the frequency over long periods of time.

    I added a few extra to my 750 and there is a definite lowering of noise, in general, and a major reduction of the high-freq, fatigue causing "Hum" that emits from the block that can make you get tired and cranky!
     
    RickCoMatic, Dec 11, 2007
    #6
  7. a340driver

    a340driver Member

    Messages:
    294
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    Langley B.C. Canada
    Thanks for asking that question, I thought maybe they "fell down" and lodged in the fins ... I took them out, and was going to chuck them.
    You never know ...
     
    a340driver, Dec 11, 2007
    #7
  8. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    I'll take them if you are going to live without them. I'll find a use for them.
     
    RickCoMatic, Dec 11, 2007
    #8
  9. ryan_975

    ryan_975 Member

    Messages:
    146
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Conway, AR
    What are these plastic things? Anyone has a picture of them?
     
    ryan_975, Dec 11, 2007
    #9
  10. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

    Messages:
    9,329
    Likes Received:
    2,069
    Trophy Points:
    113
    Location:
    The room where it happened
    They're actually a very hard rubber material, very small, about 1/2" x 1/4", sorta wedge-shaped, and there's two different sizes:


    yy5) OEM Yamaha rubber Cylinder Fin Rubber Insulators. These are the small, rubber, wedge-shaped noise absorders that fit between adjacent levels of the cylinder head cooling fins at various places on the heads. Usually hardened or missing from original motors. Replacing these insulators with new ones really helps to quite down an engine, and especially eliminates the fin "ringing", while giving your engine that "factory" appearance.

    HCP1280RH OEM cylinder fin Rubber Insulator, for the RH side of engine. Differs between models, but normally use 8-10 per engine on the right side. Fits all XJ550/650/700/750/900 models. Each:
    $ 2.50

    HCP1280RHSET10 OEM cylinder fin Rubber Insulators, for the RH side of engine. Set of 10:
    $ 21.00


    HCP1280LH OEM cylinder fin Rubber Insulator, for the LH side of engine. Differs between models, but normally use 15 per engine on the left side. Fits all XJ550/650/700/750/900 models. Each:
    $ 2.00

    HCP1280LHSET10 OEM cylinder fin Rubber Insulators, for the LH side of engine. Set of 15:
    $ 27.00
     
    chacal, Dec 11, 2007
    #10
  11. unreconstructed

    unreconstructed New Member

    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Central Florida
    Could someone please post a picture?

    Thanks,
     
    unreconstructed, Dec 12, 2007
    #11

Share This Page