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.

redo valves or not?

Discussion in 'XJ Technical Chat' started by Bane, Jan 12, 2008.

  1. Bane

    Bane Member

    Messages:
    143
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Fargo, ND
    I have an 82 maxim 650. I am having the head shaved and was looking at redoing the valves. My bike has 32000 miles on it. One local shop says yes the other says no. Also, do the valves get shimmed or adjusted through rocker arms? This makes quite the price difference at the shop and they couldn't tell me with out looking it up.
     
    Bane, Jan 12, 2008
    #1
  2. MiCarl

    MiCarl Active Member

    Messages:
    4,373
    Likes Received:
    23
    Trophy Points:
    38
    Location:
    Livonia, MI (Metro Detroit)
    Your valves are shimmed. The clearance should definitely be checked.

    I'd have them lapped, and also put new seals on them since you've got it apart.
     
    MiCarl, Jan 12, 2008
    #2
  3. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

    Messages:
    9,192
    Likes Received:
    1,986
    Trophy Points:
    113
    Location:
    The room where it happened
    Perhaps new valve guides while you're in there, the extra cost is minimal given what you're doing.
     
    chacal, Jan 12, 2008
    #3
  4. Robert

    Robert Active Member

    Messages:
    7,479
    Likes Received:
    9
    Trophy Points:
    38
    Location:
    Ventura CA
    And extend the service interval for these components a considerable distance!
     
    Robert, Jan 14, 2008
    #4
  5. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,843
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    Since the Head is off and its going to be shaved ... you might as well install new Valve Seals and have the Valve Job done while the New Seals are being installed.

    Remove Valves
    Wire Brush Stems and Valve Faces removing all deposits.
    Cut or Lap Valves in for Gas Tight Sealing
    Lube New Seals and Install
    De-carbon Combustion Chambers
    De-carbon Exhaust Ports.

    De-carbon Piston Crowns
    Polish Chambers and Crowns.

    You'll be in the neighborhood just having the Head off.
    Might as well visit the relatives while your in town!
     
    RickCoMatic, Jan 14, 2008
    #5
  6. XJXLEE

    XJXLEE Member

    Messages:
    70
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    Dublin, Ireland
    +1 on the whole job

    You would be mad not to, the only extra cost being the new valve stem seals. Also, consider going for new valve springs as they are not that expensive.

    The bike will thank you for it.
     
    XJXLEE, Jan 14, 2008
    #6
  7. schmuckaholic

    schmuckaholic Well-Known Member

    Messages:
    2,260
    Likes Received:
    42
    Trophy Points:
    48
    Location:
    California
    Why did you have to bring Britney Spears into this? :mrgreen:
     
    schmuckaholic, Jan 14, 2008
    #7
  8. Danilo

    Danilo Member

    Messages:
    469
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    Vancouver canada
    Be carefull.. Aged engines really do not like having a 'top end ' alone redone. Most any competent auto mechanic will refuse to do this.
    Added efficiency/increased cylinder pressures do bad things to worn pistons rings and crank bearings.. from the 'as new loads' re-imposed on now out of spec bits.
    Bikes?? who knows? apparently anything is OK.?
    Your mileage is lowish (but then ..EVERY.. Old Bike I've seen in the last few years has 30/35,000 miles.. astonishing ain't it :) If accurate then you might be fine... or not... Certainly Know either way..in another couple of thousand miles.
    Gluck.
     
    Danilo, Jan 14, 2008
    #8

Share This Page