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.

82 Yamaha Maxim Head Swap

Discussion in 'XJ Technical Chat' started by Kevin Skorski, Apr 11, 2023.

Tags:
  1. Kevin Skorski

    Kevin Skorski New Member

    Messages:
    11
    Likes Received:
    1
    Trophy Points:
    3
    Location:
    Fenton, MI
    Hi,

    I am planning on doing a head swap due to valve cover leaking oil from the bolts being stripped, and a couple exhaust bolts being broken. I have a spare head, just curious if I can do the swap without pulling the motor.

    Also, I know I'll have to replace the head gasket, redo the timing and valve lash. Is there anything else I have to look out for?

    Any insight is appreciated
     
    Kevin Skorski, Apr 11, 2023
    #1
  2. Finnish Cafe

    Finnish Cafe Member

    Messages:
    38
    Likes Received:
    36
    Trophy Points:
    18
    Location:
    Finland
    If problem with current head is just few threads / bolts it would probably be easier to fix those. Few helicoils in there and you're good to go. Exhaust studs you can usually do without taking head out, might be possible for valve cover threads too.
     
    Finnish Cafe, Apr 11, 2023
    #2
    k-moe likes this.
  3. vashtsdaytona

    vashtsdaytona Active Member

    Messages:
    329
    Likes Received:
    51
    Trophy Points:
    28
    Location:
    Fargo
    Yes you can remove the head with engine in bike. If you want to go further it's not much more work to pull cylinders, hone them and do new rings and timing chain is right there too. If those are wear items you are concerned about. You would then need the cylinder base gasket and a couple rubber seals, can come as a kit.
     
    vashtsdaytona, Apr 12, 2023
    #3
    k-moe likes this.
  4. Franz

    Franz Well-Known Member

    Messages:
    4,425
    Likes Received:
    1,249
    Trophy Points:
    113
    Location:
    Scotland UK.
    Watch the tubing Yamaha put on the front cylinder studs to prevent corrosion doesn't end up in the crankcase.
     
    Franz, Apr 12, 2023
    #4
    k-moe likes this.
  5. k-moe

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

    Messages:
    19,697
    Likes Received:
    6,787
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    While this is good advice, no work shuld be done before measuring and consulting the service manuals. Re-ringing an engine that already has good compression and isn't using oil is a waste of time and money. Re-ringing an engine that has out-of-round cylinders is also a waste of time and money.
     
    k-moe, Apr 12, 2023
    #5
  6. k-moe

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

    Messages:
    19,697
    Likes Received:
    6,787
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Perfect advice here.
     
    k-moe, Apr 12, 2023
    #6
  7. Kevin Skorski

    Kevin Skorski New Member

    Messages:
    11
    Likes Received:
    1
    Trophy Points:
    3
    Location:
    Fenton, MI
    Hey everyone, thanks for the advice. I went with just swapping the head with the spare the spare one I have route. Only one problem, I can't lift the old head off the cylinder studs. The head hits the frame where the horn and bracket goes. The manual even says the head can be removed if the horn bracket is removed, but the way its looking, thats not the case. Anyone run into this problem???? Here's a pic where the head is hitting the frame
     

    Attached Files:

    Kevin Skorski, Jun 6, 2023
    #7
  8. Kevin Skorski

    Kevin Skorski New Member

    Messages:
    11
    Likes Received:
    1
    Trophy Points:
    3
    Location:
    Fenton, MI
    Thanks for the reply. To do the helicoil, I would still need to remove the head correct? I don't see a way to get a drill over the bolt hole with the frame in the way.

    Also, I'm trying to remove the head right now, and it hits the frame where the horn and bracket goes. Almost seems like I can't remove the head with it in the frame. Are there any maxim models where the engine needs to be pulled? I have an 82 xj650 yics motor
     
    Kevin Skorski, Jun 6, 2023
    #8

Share This Page