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.

Having trouble with my 1981 xj550 seca - need some advice

Discussion in 'XJ Technical Chat' started by arnold, Jul 8, 2015.

  1. arnold

    arnold New Member

    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Bay Area
    Hi Guys,
    I recently acquired a complete 1981 xj550 Seca in white for $350. Only 14,000 miles on the engine. I have cleaned the carbs and rebuilt with new jets and carb gaskets. I placed them back into the bike and it started right up. However, after a few seconds, the engine would die. I would try to restart the engine but it would not restart. I waited about 10 minutes and it fired up but then quickly died. I have played with the fuel/air mixture screw. I have it at 2.5 turns from seated position. I'm not too familiar with these yamahas so any advice would be helpful.

    Thanks

    ARnold
     
    arnold, Jul 8, 2015
    #1
  2. Luis

    Luis Member

    Messages:
    82
    Likes Received:
    18
    Trophy Points:
    8
    Location:
    Seacoast NH
    Luis, Jul 8, 2015
    #2
    Stumplifter likes this.
  3. k-moe

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

    Messages:
    19,657
    Likes Received:
    6,762
    Trophy Points:
    113
    Location:
    The City of Seven Hills
    Check your valve clearances. I think you will find at least some of the exhaust valves to be tight.
     
    k-moe, Jul 8, 2015
    #3
  4. hogfiddles

    hogfiddles XJ-Wizard, Host-Central NY Carb Clinic Moderator Premium Member

    Messages:
    14,982
    Likes Received:
    5,260
    Trophy Points:
    113
    Location:
    near utica, new york
    I wouldn't worry about the valve shims at this point---

    I'd suspect your floats are not at correct heights, and/or you have some throttle-shaft seal leaks, AND if your bench sync is off you'll have trouble, too
     
    hogfiddles, Jul 8, 2015
    #4
  5. Polock

    Polock Well-Known Member

    Messages:
    9,751
    Likes Received:
    2,097
    Trophy Points:
    113
    Location:
    Beaver Falls, PA
    put the fuel valve to prime and see what it does
     
    Polock, Jul 8, 2015
    #5

Share This Page