1. 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.

Seca650 No spark

Discussion in 'XJ Technical Chat' started by MrSeca, Apr 2, 2019.

  1. jayrodoh

    jayrodoh YimYam Premium Member

    Messages:
    2,522
    Likes Received:
    1,102
    Trophy Points:
    113
    Location:
    Cleveland
    No the engine oil should not be. The shaft stays dry but is greased on both ends. Pull the rubber boot back at the motor and see if there is oil in there. If so then your seal on the motor is bad and could be running down inside the swing arm. I would suspect you’d have leakage at the boot though too.

    Have you cleaned it up throughly and ridden to see if there is a significant leak?
     
    hogfiddles likes this.
  2. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    No, not yet.
     
  3. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    Would anybody know if the final drive for the Seca 650 is the same as the Seca Turbo and or Maxim. I'm going to do a swap. Can I use the final drive off an xj750 maxim/seca as well?
     
    Last edited: Apr 1, 2020
  4. jayrodoh

    jayrodoh YimYam Premium Member

    Messages:
    2,522
    Likes Received:
    1,102
    Trophy Points:
    113
    Location:
    Cleveland
  5. hogfiddles

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

    Messages:
    14,626
    Likes Received:
    5,008
    Trophy Points:
    113
    Location:
    near utica, new york
    I believe they are the same
     
  6. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
  7. jayrodoh

    jayrodoh YimYam Premium Member

    Messages:
    2,522
    Likes Received:
    1,102
    Trophy Points:
    113
    Location:
    Cleveland
    It’s a different part number that only lists for the 82/83 turbo. I don’t know if that’s because it’s a different color or gear ratio etc. It may physically fit but I can’t answer that one.
     
    XJ550H likes this.
  8. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    Thanks everyone. There's a ton on ebay.

    clutch 2.jpeg clutch 1.jpeg
    On a different note can anybody tell me what I'm doing wrong with installing my clutch cable. I can't seam to get enough tension. After attaching it I tighten both sides of the cable until I can't anymore and there is still a lot of slack left over (see pics). My last clutch cable did this too so I think I'm doing something wrong. The part number is correct. I should also mention that the spring that goes around the push lever axle right beneath the push lever is broken. Any tips would be great.
     
  9. hogfiddles

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

    Messages:
    14,626
    Likes Received:
    5,008
    Trophy Points:
    113
    Location:
    near utica, new york
    Well, that spring needs to be replaced. Then there is some preload that you need to put on that lever. You may need to re-index the arm, too. That all said, are you sure the cable is the correct cable? My bet is you have the wrong cable, unless you got it from LEN.
     
  10. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    Re-indexing the arm made all the difference but you're right about that spring.
     
  11. XJ550H

    XJ550H Well-Known Member Premium Member

    Messages:
    13,199
    Likes Received:
    3,854
    Trophy Points:
    113
    Location:
    Great North Woods
    Your clutch safety switch is also popped out of perch I want to reinstall or replace it
     
  12. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    That thing has been out for a while. What's it for??
     
  13. XJ550H

    XJ550H Well-Known Member Premium Member

    Messages:
    13,199
    Likes Received:
    3,854
    Trophy Points:
    113
    Location:
    Great North Woods
    it lets you start bike in gear when clutch is pulled in. with it poped out your bike may turn over when in gear with clutch not pulled. if switch has broken and is Open your bike will only start in neutral
     
    MrSeca likes this.
  14. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    I've been having an issue with the clutch. When I shift into 2nd gear, unless I find that sweet spot, it makes a ka-lack sound and it kind of hurts my toes. It also does the same thing going into 3rd and then smooths out for 4th and 5th. I tried adjusting the cable by tightening and loosening it. I'm wondering if I need new plates. Any thoughts on what I need to do?
     
  15. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    I just did a valve check and one valve, the intake, measures at 0.16. It's suppose to be from 0.11 - 0.15. I don't mind fixing it but is it THAT important that I find a shim for that one valve or should I pretty much be okay?
     
  16. XJ550H

    XJ550H Well-Known Member Premium Member

    Messages:
    13,199
    Likes Received:
    3,854
    Trophy Points:
    113
    Location:
    Great North Woods
    do you know what shim you need?

    if you use the inch measurement feelers it will be in spec. 0.006 =.15mm and.16mm
     
  17. hogfiddles

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

    Messages:
    14,626
    Likes Received:
    5,008
    Trophy Points:
    113
    Location:
    near utica, new york
    .16mm is OUT OF SPEC for an intake. You need to pull the shim to find out what size it is and then you need to go up one size.
     
  18. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    that's what I wanted to hear, thanks
     
  19. MrSeca

    MrSeca Active Member

    Messages:
    422
    Likes Received:
    61
    Trophy Points:
    28
    Location:
    Oakland, CA
    Yeah. The shim in there currently is 280. So I believe I need to go up a size to 285. I was just more curious how important/not important it is to change the shim being that all the 7 of the other shims are perfectly in spec.
     
  20. hogfiddles

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

    Messages:
    14,626
    Likes Received:
    5,008
    Trophy Points:
    113
    Location:
    near utica, new york
    In spec is in spec. Out of spec is out of spec.
    If a clearance is out of spec, it needs to be put back in spec.

    my concern, though, is this——normal usage dictates tha clearances will diminish, but yours has increased. There’s very few ways that can happen;
    1.a wrong shim went in at the factory - unlikely
    2.a wrong shim got installed by a PO - possible... there are some incorrect charts out there, but if it’s only one shim, it’s unlikely this is the reason
    3. A shim went in that was marked wrong-unlikely but it can happen
    4. You have a bent valve or valve stem causing some binding- very possible.

    you need to do a compression test to see if it’s low on that cyl. With that great of a clearance, there’s no risk of riding on the cam so theoretically the valve is closed tight. You should have exceptional compression. If it seems to have lower compression, then I’d do a leakdown test to determine if it's that valve or not.
     
    MrSeca and Franz like this.

Share This Page