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Clutch Slips XJ 750

Discussion in 'XJ Technical Chat' started by emre_xj_750, Mar 27, 2014.

  1. emre_xj_750

    emre_xj_750 New Member

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    I was basically recovered this xj 750 (`82) from dumpster. I was able to get it running but clutch slips after (say 4000 rpm) I don`t have a tachometer...

    Drained the oil took the clutch a part and observed a light rust on disks (steel ones) removed with wire brush, filled with 15/50 full syntheic mobile 1 oil but still slips.

    clutch disk thicknesses were 0.119" and seems in shape not worn...

    what should I do now?
     
    emre_xj_750, Mar 27, 2014
    #1
  2. adrian1

    adrian1 Active Member

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    wrong oil. Use something like 4t castrol mineral oil or similar motorcycle specific oil. Check cable is adjusted properly and not not binding somewhere along its length ie make sure actuator arm at clutch end returns freely. check clutch springs in spec.
     
    adrian1, Mar 27, 2014
    #2
  3. k-moe

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

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    Check my signature line for tips on chosing oil. Then make the assumption that the clutch friction plates and clutch springs are due for replacement.
     
    k-moe, Mar 27, 2014
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  4. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Indeed. Original friction plates become little linoleum squares (linoleum is essentially sun-dried oil) and the springs sag out.

    If you were able to clean up the steels and they weren't warped or burnt blue, then they should be OK.

    ***TIP*** Be very careful when tightening the bolts, they go to a very light torque spec.

    Make sure the dot on the pressure plate is oriented to line up with the dot on the hub.

    And leave the steel wool for refinishing furniture. Switch to Scotchbrite, it comes in many different grades (just like steel wool) but doesn't shed and/or imbed potentially harmful steel particles.

    And definitely get that full synthetic car oil out of there immediately. Before you replace the clutch friction plates, so you don't soak the new ones in the wrong stuff.
     
    bigfitz52, Mar 27, 2014
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  5. emre_xj_750

    emre_xj_750 New Member

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    After riding a while (5 miles or so) with 15/50 mobil one slip seems to be improving...I had filled with chevron`s cheapest oil before....
     
    emre_xj_750, Mar 28, 2014
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  6. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    You'll start having starter clutch issues if you leave the synthetic automotive oil in there.
     
    bigfitz52, Mar 28, 2014
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  7. emre_xj_750

    emre_xj_750 New Member

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    ohh! I must remove it as soon as possible then! wasted $12.5 ohh well
     
    emre_xj_750, Mar 28, 2014
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  8. k-moe

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

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    Wasted $12.50? No, you got a $12.50 lesson. Most lessons cost a lot more.
     
    k-moe, Mar 28, 2014
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  9. emre_xj_750

    emre_xj_750 New Member

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    I used this because I got another motorcycle which I run 5/30 mobil1 for years, no problem...
    yes I got a lesson for sure!
     
    emre_xj_750, Mar 28, 2014
    #9
  10. RATTLECANREBEL

    RATTLECANREBEL Member

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    I would use MC specific 10W40

    The steels or steel plates should have a perforated finish on them if it is worn you can ruff them up yourself and they will work till your next pay day

    If your bike is slipping under a load as in when you give her the throttle hard or when you have a passenger this is a good indication that your clutch springs need to be replaced
    It's a very cheap and easy fix
    ROBERT
     
    RATTLECANREBEL, Mar 29, 2014
    #10

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