Oil

Discussion in 'Technical Help' started by Cream_Revenge, Oct 14, 2017.

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  1. hmm. plenty time for a melt down once we tell you whats actually wrong.
     
    #81 finm, Oct 30, 2017
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  2. So how do I figure if it's rings or valves?

    Any point my unbolting anything else or should I just put back together and hand to a pro?
     
    #82 Cream_Revenge, Oct 30, 2017
  3. #83 Cream_Revenge, Oct 30, 2017
  4. Those plugs look like they centre electrodes are quite worn mate when was the last time you changed em?

    As you're getting the valves done soon anyway I'd suggest you just order some ThreeBond and get the valve cover off, clean it and the sealing ring, and then put it back on as per the manual.

    The manual shows you where, exactly, you need to put the ThreeBond when reinstalling.

    Both of those compression values are a bit low TBH, the V cylinder being lower could be due to a bunch of things, including the valve clearances tightening up and/or as mentioned earlier the valve stem oil seals or the piston rings.

    Leak down test will tell you quite a few things but again just take the valve cover off and check/reseal it for now as you have a valve job coming up.
     
    #84 Air Duck, Oct 30, 2017
  5. seeing as its the vertical cylinder a wee squirt or two of oil down the bore will eliminate the rings if its still low.
     
    #85 finm, Oct 30, 2017
    • Agree Agree x 1
  6. Ok. Please elaberate on what "a wee squirt" actually is please.
     
    #86 Cream_Revenge, Oct 30, 2017
  7. Plugs are just over 1 year/3k mls old.

    I'm not needing to ride bike again this year, I have other bikes and no TDs booked, so unless it will tell me something I won't take heads off. No need to reseal I think. If it was June it would be a different matter!
     
    #87 Cream_Revenge, Oct 30, 2017
  8. OK, so where's all that oil coming from on the outside of the plug?
     
    #88 Air Duck, Oct 30, 2017
  9. one exige to be more precise :innocent:
    i dunno, about a dessert spoon or two?
     
    #89 finm, Oct 30, 2017
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  10. Sorry, crossed wires. Yes agree it needs sorting.

    What I'm saying is, as I won't be riding the bike again no need to reseal. As it'll only need to come apart again anyway to get the valves done.

    I'm just trying to diagnose.
     
    #90 Cream_Revenge, Oct 30, 2017
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  11. Pistons are pretty big on these bikes mate so 2 or 3 teaspoons full should do the job, the oil acts as a temporary seal around the edge of the piston. Stick the oil in then do a compression test and write down the result.
     
    #91 Air Duck, Oct 30, 2017
  12. 128 wet on V.

    I put down 10ml.

    So that indicates?
     
    #92 Cream_Revenge, Oct 30, 2017
  13. Oh. Google says piston at fault.

    That'll be the expensive option then.

    Thanks guys, I think it's time she went to a pro.
     
    #93 Cream_Revenge, Oct 30, 2017
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  14. Both sound low to me? Not sure what they should be but I'd have thought around 150psi?
     
    #94 Dukedesmo, Oct 30, 2017
  15. Don't know. Did some Google but no luck. Did say numbers will be lower on a cold engine though.
     
    #95 Cream_Revenge, Oct 30, 2017
  16. That all sounds about right. As usual it could be a few things or something else, could be a scored bore, damaged or worn piston ring, some tw*t not spacing the ring gaps out, probably one of those. Nothing serious anyway.

    Sounds like the valves aren't being held open which is good or if they are, not by very much.
     
    #96 Air Duck, Oct 30, 2017
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  17. At least it's come to light at the beginning of winter so I have 4 months to sort.
     
    #97 Cream_Revenge, Oct 31, 2017
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  18. And another positive, I've done my first compression test.
     
    #98 Cream_Revenge, Oct 31, 2017
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  19. Do a compression test, you can get a tester from Halfords or off the internet for about £20 or so.
     
    #99 Samurai, Oct 31, 2017
  20. Oops, I'm I'm a bit late with that suggestion then :blush:
     
    #100 Samurai, Oct 31, 2017
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