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Help My 2001 ZZR250

Discussion in 'Kawasaki 250cc Twins' started by Sandra, Sep 17, 2015.

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  1. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Valve clearances are easy to check. You need feeler gauges. You have to remove the rocker cover and use the gauges to check the clearance between the camshaft lobe and the valve. You'll need to refer to the service manual for the valve specs.

    What happens is that the valve seats (they seal compression gasses) wear and start recessing. This causes the valve clearance to become tight. Which in turn means the valve is open longer, doesn't cool down as much (critical for exhaust valves) which can eventually burn them or crack them.

    As for clutch/roll starting... it's easy if you have a slightly downhill road. Sit on the bike, start rolling in neutral, clutch in. Once you have some speed, pop into 1st or 2nd (2nd is easier), let the clutch out, give it a bit of throttle. If it fires, keep the throttle on and pull in the clutch.
     
    Linkin, Sep 18, 2015
    #21
  2. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Frustrating issue. Have you tried some start ya bastard? So wierd that it just wont start.
     
    Th3_Huntsman, Sep 18, 2015
    #22
  3. Sandra

    Sandra Active Member

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    Yes i have a can of that, but a bit pointless to use it if the airbox and carbies aren't attached.

    Yes it is very frustrating, i have packed it up for today and will try again tomorrow
     
    Sandra, Sep 18, 2015
    #23
  4. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Is there any sign of fuel spitting back out of the carbs when you crank it? If so, this is a sign of inlet valves too tight (not enough clearance) and will need to be adjusted.
     
    Murdo, Sep 18, 2015
    #24
  5. Sandra

    Sandra Active Member

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    No fuel seen
     
    Sandra, Sep 18, 2015
    #25
  6. kiffsta

    kiffsta Senior Member

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    if the airbox is off, I would whip the carbs off and pull the slow jets out and make sure they are clean, you can also try and cover the inlets to the carbs with a rag to richen the air fuel mix
     
    kiffsta, Sep 18, 2015
    #26
  7. Sandra

    Sandra Active Member

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    I will pull the airbox right out tomorrow, and put the rubber boots in hot water so i can fit them back on the carbys.

    It is great of fuel, but i will check the jets while i am at it
     
    Sandra, Sep 18, 2015
    #27
  8. thebeefsalad

    thebeefsalad Well-Known Member

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    That's a vacuum operated petcock isn't it? What kinda shape is the vacuum line in?
     
    • Like Like x 1
    thebeefsalad, Sep 19, 2015
    #28
  9. kiffsta

    kiffsta Senior Member

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    @Sandra , how did you get on ?
     
    kiffsta, Sep 23, 2015
    #29
  10. Sandra

    Sandra Active Member

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    All good.

    have to dismantle the back end of the bike to remove the airbox, and ended up removing the carbs as well. But after all that the bike is running well just need to adjust the idle.

    I took it for a run around newcastle city, it runs better then it did before, so i am really happy now.

    All the advice was great appreciated
     
    • Like Like x 4
    Sandra, Oct 16, 2015
    #30
  11. kiffsta

    kiffsta Senior Member

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    good to hear you are back on the road Sandra
     
    kiffsta, Oct 16, 2015
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  12. Sandra

    Sandra Active Member

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    Thanks, will take it out again today.
     
    Sandra, Oct 16, 2015
    #32
  13. Phil

    Phil Senior Member Contributing Member

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    Hi Sandra
    Great to hear you are on the road again :thumb_ups:
     
    Phil, Oct 16, 2015
    #33
  14. Sandra

    Sandra Active Member

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    Thanks Phil,

    It has been a while, glad to be back on my bike again
     
    Sandra, Oct 16, 2015
    #34
  15. Phil

    Phil Senior Member Contributing Member

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    I know exactly how you feel, I've been off the road for nearly 3 months...not bike related at all.
    My leg operation has been sorted at long last and boy am I ready to hit the road.
     
    Phil, Oct 16, 2015
    #35
  16. risky

    risky risky

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    good news sandra- up to the ride to sawtell next weekend.good bunch of blokes who enjoy a chin wagand a laugh.i might even wind up the huntsman and kiffsta is always happy.murdo is tops and the tamworth people are always good fun. damus is trying to make it and this old coot will be tail end charlie if anyone strikes trouble.
     
    risky, Oct 16, 2015
    #36
  17. Sandra

    Sandra Active Member

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    i will be in tamworth at my brother's wedding, but the bike will stay home as my car is required.
     
    Sandra, Oct 16, 2015
    #37
  18. Sandra

    Sandra Active Member

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    You will be on the road again soon too
     
    Sandra, Oct 16, 2015
    #38
  19. risky

    risky risky

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    you might pass me on friday if damus cannot make it silver helmet with risky on it.
     
    risky, Oct 16, 2015
    #39
  20. Sandra

    Sandra Active Member

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    Not heading up until saturday
     
    Sandra, Oct 16, 2015
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