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  • 1 Post By TonyXX
  • 1 Post By TonyXX

Thread: New here

  1. #1

    Member #
    37407
    Bike(s)
    -97 XX
    Join Date
    Apr 14 2019
    Location
    Finland
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    New here

    Hello! I just bought a 1997 bird. First of all bike has no history data, it has been driven ~53 000km (I don't believe that). It is already modified, for example it has kawasaki zx10r tail. Now I have one problem, when the bike is idling, oil pressure light is blinking slightly. Bike is idling around 1000 to 1100rpm. When raising rpm little, light doesn't light up anymore. Previous owner said that he changed engine oil 1000km ago, and I did check oil level and it was ok and oil was bright. Idling is also little wavy.

    What to check first? Carb sync upcoming days ofcourse, but that does not remove oil light problem

    Is this even right place for this kind of a question, if not can you please guide me to the right place

    And I am sorry for my bad english, I'm from Finland. I hope I'm not sounding like Yoda from star wars

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  3. #2

    Member #
    9984
    Bike(s)
    99 CBR1100XX
    Join Date
    Nov 01 2010
    Location
    Macclenny FL
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    Re: New here

    welcome to the bb family, well to start just make sure your idle stays at 1100 rpm that's normal but if you have 4 to 1 then I would go up to 1200 that's how I got mine set. unless you have a pc2 or 3.

  4. #3

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
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    Re: New here

    You can also tap off the oil pressure light with a T and install a guage to check you pressure.
    From the factory manual
    Oi l pressure at oil pressure switch
    490 kPa (5.0 kgf/cm 2 r 7 1 psi) at
    5,400 rpm / (176 °F/80 °C)
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

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  6. #4
    Supercharged Mod
    Member #
    4781
    Bike(s)
    99 Bird. 03 Supercharged KwakBird. DR800 Big
    Join Date
    Oct 25 2008
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    UK South West
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    Re: New here

    Welcome to the flock TonyXX.
    As noted already the idle is too low at present, 1125 is 'standard' but most riders up it a bit to avoid clutch rattle on start up.
    Personally I would check the oil pressure as suggested by beestoys, that should give you peace of mind.
    Full of Hot air? Intercool yourself............ you know it makes sense

  7. #5

    Member #
    37407
    Bike(s)
    -97 XX
    Join Date
    Apr 14 2019
    Location
    Finland
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    Well... I did check oil pressure, at idle it shows 0.4bar and at 5400rpm it shows 2bar.. can this be possible? If the pressure is that low, oil pump must be in poor condition. I'm just not sure about the gauges I used to check pressure, other one showed the above mentioned values and other gauge showed zero, even with 5400rpm.. 😄 What do you think, can oil pressure relief valve be plugged or something like that? Oil pressure light still only flashes at idle.

  8. #6

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
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    Re: New here

    Tony
    I'd borrow a tested gauge and retest using it. If it's still low your probably looking at either a bad pressure relief (good scenario) or hurt main bearings.
    What is the riding history of the previous owner IE raced thrashed or taken care of.
    The other possibility is plugged oil passages but then what is plugging them. Sadly it sounds like you might be heading for an engine teardown to make sure. I wouldn't run it any more until your certain. If the bearings have just started to go away then it's possible you won't have any severe damage yet.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  9. #7

    Member #
    326
    Bike(s)
    05 Bird
    Join Date
    Nov 16 2006
    Location
    Bombay, India
    Posts
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    59 times

    Re: New here

    Welcome from Mumbai, mate... happy riding, buddy... you'll most likely love the bike like most of us do on here.
    cheers

  10. #8

    Member #
    37407
    Bike(s)
    -97 XX
    Join Date
    Apr 14 2019
    Location
    Finland
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    Update.. pressure relief valve looks ok and moves well, I didn't find any value for that spring inside the valve, but I think it works well. I took oil pump off and did measure it and it is also ok. I did also clean oil strainer. Everything looks ok, engine sounds ok (no excessive noises and so on) but still theres no more than 200kpa pressure at 5400rpm.. and now its also tested with NEW gauge. Is it possible that spring inside of valve is dead? I just dont want to believe that rod bearings are worn out because theres no noise. Is there still any other possibilities than plugged oil passages or bearings? Crankshaft needle bearing? Thanks for your help

  11. #9

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
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    Re: New here

    Spring could be toast, buy a new one and see. Other possibilities could be plugged passages but the only way to confirm is a total teardown.

    20190512_115605.jpg
    Last edited by beestoys; 05-12-2019 at 3:02 PM.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  12. #10

    Member #
    37407
    Bike(s)
    -97 XX
    Join Date
    Apr 14 2019
    Location
    Finland
    Posts
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    And we have found the issue. Main bearing at the stator side end of crankshaft was toasted. Everything else inside of the engine looks very good and clean and so on, even camshafts looks like new. Fortunately the fault was found and can be fixed quite easily.
    o4xx likes this.

  13. #11

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
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    Re: New here

    Back check supply and be sure that passage is clean and free of debris or your going back in to replace it again. Glad it only took one bearing.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  14. #12

    Member #
    37407
    Bike(s)
    -97 XX
    Join Date
    Apr 14 2019
    Location
    Finland
    Posts
    6
    Liked
    2 times
    Yes thats what I'm going to do, also all main and rod bearings will be changed to be sure that it's ok and will last long without issues. Thanks for help Beestoys! And of course I will check all of other bearings, seals and components now when engine is open
    stellborn likes this.

  15. #13

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
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    Re: New here

    From us all your very welcome good sir.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  16. #14

    Member #
    37407
    Bike(s)
    -97 XX
    Join Date
    Apr 14 2019
    Location
    Finland
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    Cause of bearing failure found! When I found that one broken bearing I thought that one broken bearing just could not cause 300kpa pressureloss. Well now when I cleaned oil channels I found out that oil channel in stator housing does not have plug or bolt in the end of channel.. no wonder why that bearing is gone, it gets oil from that channel. Maybe some previous owner has taken off that bolt and forgot to put it back because I have not touched that bolt.


 

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