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83 Seca 900 bogs down.

Discussion in 'XJ Technical Chat' started by MrSeca, May 17, 2020.

  1. MrSeca

    MrSeca Member

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    I just got a killer deal on a near mint 83 Seca 900 with 33k miles. I can't tell you how happy I am.

    Unfortunately it has come with one noticeable issue. The bike seems to bog down when I open the throttle. It eventually gets there but with some hesitation along the way. I'll be at 70 on the freeway and if I open the throttle it's almost like I hit the kill switch for a second. The bike idles nice and revs nice and it doesn't bog down in the lower gears necessarily but from my experience I feel like it's lacking a little power. The actual bogging down is more noticeable at higher revs/speeds.

    I just got the bike and haven't tried anything to fix the problem yet. Does anybody have any suggestions on what it might be. I bought it off the original owner and from what I can tell he barely rode the bike for the last 15 years. It just sat in his garage and collected dust taking it out occasionally. Any suggestions would be great. Thx
     
  2. Polock

    Polock Well-Known Member

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    start with easy things. replace the air filter with a new o e m style, could be all you need
     
  3. MrSeca

    MrSeca Member

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    Hmmmmm, I wonder.
     

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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    dirty , not that bad but if filter has been sitting for 15 years get a new one. eliminate it as the issue.
     
  5. Toomanybikes

    Toomanybikes Well-Known Member

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    C055AEAD-5553-4E1A-9C3A-BBCF39E89724.png
     
  6. hogfiddles

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

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    Make sure to send a pm to me so I can get it onto the 900rk database, or update a file.
    Dfox
     
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  7. Polock

    Polock Well-Known Member

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    HI-FLO-FILTRO........that sounds like a quality part, they made covid 19 masks last week
     
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  8. MrSeca

    MrSeca Member

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  9. MrSeca

    MrSeca Member

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    Could I ride the bike without the filter for one quick ride to find out if that was the issue or not or should I do no riding whatsoever and wait for the filter?

    On another note I heard only about 1200 of these bikes made it to the US. Is that true?
     
  10. hogfiddles

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

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    I sent a lengthy post to your inbox......

    dfox
     
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  11. Toomanybikes

    Toomanybikes Well-Known Member

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  12. Minimutly

    Minimutly Active Member

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    Bogging on throttle is a sign of lack of fuel. Take the filter out and go for a spin - no harm in it, but doubtful it will change anything. In theory it could be weak because you have a highflow filter, but I doubt it - maybe get a standard replacement?
    Take tha carbs apart and have a look in the float bowls, but before doing that perhaps an hour with some clear tube to check float levels might be a good idea?
     
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  13. MrSeca

    MrSeca Member

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    Bogging down has been solved. Poured a little seafoam down the carbs and voila! This thing runs smooth.
     
  14. MrSeca

    MrSeca Member

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    Could someone point me to a video or something on how to properly figure out how to put the wheels back on without the brake calipers rubbing on the rotor. I just changed the front and back tire but before I removed them I spun them and they turned as free as the air. Now when I put them back on they're rubbing all over the place. I don't know whether to secure the pinch bolts first or the axle nut first. The owners manual is extremely vague on this procedure. I only successfully done this once over a year ago but they were floating calipers and the 900 are dual pistons. Any help would be very much appreciated.
     
  15. hogfiddles

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

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    Pinch bolt is the last thing to do
     
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  16. MrSeca

    MrSeca Member

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    Can anybody give me some good tips on how to get the mixture screws right? I'm about to synch up the carbs on my Seca 900 and I always have a hell of a time with those darn mixture screws. What's the secret to getting them right? I have the Gunson color tune and I swear, I never see a change in the color when I use them. So in the past, I just put the mixture screws at factory standard, synch the carbs from there and call it a day.

    But with the Seca 900 I'd really like to give it a go and get it right with those mixture screws. I recorded what the PO has them at and they're all over the place. I do not know if this is where the factory put them or if he messed with them at some point. If anybody has some good tips that would be greatly appreciated.
     
  17. hogfiddles

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

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    Make sure you have no vacuum leaks first.....
     

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