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2 questions

Discussion in 'XJ Technical Chat' started by hash, Jul 12, 2012.

  1. hash

    hash Member

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    ok the petcock what direction to aim it mine runs on both up and down but bucks till i switch it from one to the other i never run it pointingbackwards i know thats bad another i switchted my oil for some 15w40 deisel oil was told its great in these bikes now idk if it did this before but the cltch seems to slip around 8000 rpm :D do i change my oil for new stuff or is this a clutch plate problem ?by the way ive come far on this bike its now a scarry bike to give wot more then double the power it had before as i got my carb cleaned at carbking.weebly.com and was able to adjust them but this clutch problem is the cherry on the sunday if it didnt slip im sure i could compete with sports bikes from today iv removed 50 pounds from the bike in usless parts and stuff iv cleaned carbs changed clutch oil cleand the spark plugs all i want now is for the clutch to stop slipping
     
    hash, Jul 12, 2012
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  2. fintip

    fintip Member

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    You can try an oil change and see if that fixes it. Otherwise, go buy some clutch plates and check the video link in my sig.
     
    fintip, Jul 12, 2012
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  3. fintip

    fintip Member

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    Reserve is lever covering left side

    Prime is lever facing down/middle

    On is lever covering right side
     
    fintip, Jul 12, 2012
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  4. hash

    hash Member

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    hey fin tip my lever facing to the rear of the bike is marked pri so we do not have the same petcock
     
    hash, Jul 12, 2012
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  5. maverickbr77

    maverickbr77 Member

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    forward/left res, down on, back/right pri.
    try an oil change my take a few miles to clear up if its the oil, if it keeps slipping time to look at your clutch plates.
     
    maverickbr77, Jul 12, 2012
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  6. hash

    hash Member

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    oh my pet cock wont face forwards if i try :S
     
    hash, Jul 12, 2012
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  7. KrS14

    KrS14 Active Member

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    82 seca 750, original petcock, is:

    forward - res
    down - on
    rearward - prime
     
    KrS14, Jul 13, 2012
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  8. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Your clutch isn't slipping because you had gas in the oil.

    Your clutch is slipping because it's 30 years old. The little friction pads have turned to linoleum.

    Rebuild it.

    New friction plates and springs; new plain plates if those're burnt, warped or scored otherwise they should clean up.

    And you'll need a cover gasket.
     
    bigfitz52, Jul 13, 2012
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  9. hash

    hash Member

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    no my plates are still very thick and the guy i bought te bike off of bought it from some biker who take really good care of his bikes im sure its been rebuilt a few times def not 30 years old geez :D thanks for the reply nd i think the noise is valve float and i was shifting to late. i rode it again today and it doesnt slip the power just tapers off.if i hold it to long anyone know of a good place to get a tack i can splice to my harness?
     
    hash, Jul 13, 2012
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  10. BluesBass

    BluesBass Member

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    For the petcock: Run it in the ON position most/all of the time. When it starts to sputter and die, switch it 180 degrees to RES (reserve). This helps you NOT get stranded. Use PRIME (in the middle) after you have the carbs off or run out of gas and need to refill the carb bowls so the bike will start.

    If your valve appears to not be functioning properly (allowing gas to always pass into the carbs in ON or RES or not allowing fuel even when the bike is running) you should rebuild it. I had to rebuild mine when I got my bike.


    Your clutch may still need replaced. Many of these bikes still have original clutches in them (BOTH mine included) and so it is quite possible that the clutch could be your problem.

    Now in the event you confirm the clutch is fine, it may also be the oil you are using. Here's a good question for you: Why would you use diesel oil over motorcycle specific oil in a gasoline motorcycle with a WET clutch?

    Change out your oil with motorcycle oil (I have had no problems with Yamalube brand 10W40 for motorcycle engines), ride a few hundred miles and change the oil again. Make sure you drain ALL the oil (including the final drive in the bottom of the transmission) so you can get all that diesel stuff out.

    IF you suspect gasoline in the oil, SMELL the filler port on the left side of the transmission. If you don't smell gas then it is fine.

    Good luck, and congratulations on making progress so far.
     
    BluesBass, Jul 13, 2012
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  11. maverickbr77

    maverickbr77 Member

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    I have a spare seca cluster back home. Have you tried to clean yours yet?
     
    maverickbr77, Jul 14, 2012
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  12. hash

    hash Member

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    oh ye how much would you want for it im very interested
     
    hash, Jul 26, 2012
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  13. hash

    hash Member

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    well ive always used deisel oil in my cars trucks and quads used it in my dirtbikes too works great keeps well lubed and i find haults the alve noise ill try tho
     
    hash, Jul 26, 2012
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  14. maverickbr77

    maverickbr77 Member

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    make me a fair offer I'm back in NH right now so I cant get pics right away
     
    maverickbr77, Jul 26, 2012
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