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XJ650 Seca Seized Engine Help

Discussion in 'XJ Technical Chat' started by Rebem, Jul 28, 2016.

  1. Rebem

    Rebem Member

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    Should an electronic flasher relay drop straight in to this bike? No LEDs, just normal globes and I have unplugged the cancelling unit to rule it out but I get nothing on a new relay. Reason for the swap is that the thermal one was playing up so I thought to swap it out. I'll go over all the globes and sockets tonight with dielectric grease but I find it strange that it just doesn't do anything at all with the new relay.

    Checked these (very helpful) threads for info:
    http://xjbikes.com/forums/threads/turn-signal-problems.73794/#post-481325
    http://xjbikes.com/forums/threads/how-are-the-blinkers-supposed-to-work.113790/#post-570448
     
  2. k-moe

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

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    Which relay did you buy?
    Not all relays have the same terminals, and the substitute for the stock realy is a 2-terminal, not a 3.
     
  3. Rebem

    Rebem Member

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  4. a100man

    a100man Active Member

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    'supercheapauto.com' sound like my kind of shop!
     
  5. Rebem

    Rebem Member

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    Hehehe, yes it's not bad.

    So I re-wired the 3 terminal relay to work by putting in a negative wire. Works a treat.
     
  6. barry l

    barry l New Member

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    My XJ's turn signals quit flashing - just stayed on if switched left or right. I priced a new Yamaha flasher, but the $110 scared me off. I tried an electronic led style flasher - no lights. Finally I bought a two prong $4 incandescent flasher suitable for an older car. If you plug it in with the "L" terminal (found on the bottom of the relays) in the proper position, it works!
    IT WILL NOT SELF CANCEL so be careful.
     
  7. Rebem

    Rebem Member

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    Understood Barry - I've never had a bike with auto cancel before so it hasn't been any problem just cancelling it myself.

    Another question for the brains trust... I seem to have a cold cylinder - #3, but not all the time. I have new plugs, new caps, ohmed everything out to check the coils and the leads and I can see good spark when I test. The bike runs well through the gears but idles a bit rough and plug 3 tends to foul over time.

    Is it possible that I have something wrong with the idle circuit in that one carbie?
     
  8. rocs82650

    rocs82650 Well-Known Member Premium Member

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    Imo yes. Did you clean the carbs?

    Gary H.
     
  9. Rebem

    Rebem Member

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    Carbs have been to church. Thoroughly.

    I think I'll pop that one open and go over it though.
     
  10. Rebem

    Rebem Member

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    How do these look? I'm thinking #3 is ok, maybe a touch lean and the others are a bit rich? This is a tune without a Colortune. The bike idles ok, then stumbles to about 3,000rpm and then runs great from there.

    Spark Plugs.jpg
     
  11. Rebem

    Rebem Member

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    Well the Colortune was a good investment and showed me that cylinder 3 is misfiring a lot. Like I said in a previous post, it's poor until 3,000rpm then takes off so idle/pilot circuit is what I'm looking at.

    Carbies are off the bike and I've stripped #3. It looks pretty clean and throttle cleaner blasts through it from the pilot jet pipe out the air jet and out the mixture screw area. Anything else I should look at while I have it here?
     
  12. Rooster53

    Rooster53 Active Member Premium Member

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    Check flow through the idle / transfer ports for that carb, and maybe the others too. I drilled an old pilot jet to fit the straw on the carb cleaner, plugged the air jet with a wooden Q-tip with heat shrink applied, and installed the enrichment screw less the O-ring 3 turns up from soft bottom.



    If flow looks good consider float fuel level set again and condition of throttle shaft seals - or other possible air leaks.
     
  13. Toomanybikes

    Toomanybikes Well-Known Member

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    Have you checked the fuel port in the float bowl
     

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  14. Rebem

    Rebem Member

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    Thanks Rooster - those instructions were spot on. Everything looks clear and clean.

    Toomanybikes - yep, double checked it. I don't have any issues starting the bike but it's good to go over it anyway.

    Reassembling now and I'll see how it goes.
     
  15. OleDirtyDoc

    OleDirtyDoc New Member

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    good read.I'm at the very beginning of this story myself
     
  16. Rebem

    Rebem Member

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    Good luck with it Doc. Let me know if there's anything you want in the form of photos or reference material. It's sometimes hard to find or daunting to look at from a new user perspective.

    Update on the carbies : The bike runs better from 2000rpm now but still stumbles a bit up to there. I'm about to do a ton of mods (block your ears purists - it's going cafe) to it so I'm sure I'll have them off again at some point and I'll triple check everything.

    I did notice the floats are shedding some of their plastic - small plastic bits in the #3 float bowl so that could certainly be a source of trouble.
     
  17. Nuch

    Nuch Active Member

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    Nooooooo!

    It's already a cafe! Don't do it!
     
  18. Rebem

    Rebem Member

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    I get it, I really do and I have a bit of a goal to make it completely restore-able. Sometimes I keep some of these plans to myself because this forum tends to be a bit more focused on restoration than modification but hey, it's my bike :)

    Oh and these "Seca" bikes aren't nearly as rare over here as they are in the US.
     
  19. hogfiddles

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

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    I agree 190%
    I love these bikes out back to original condition, but yes- it's your bike, make it what's right for YOU, and yes-it's only a "rare" model for the USA, not for where you're at.

    Carry on :)

    Dave
     
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  20. Nuch

    Nuch Active Member

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    Only kidding of course...

    Send some over, we'll take them.


    ...or should I say, Dave will take them!
     
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