/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Valve clearances - ZXR

Discussion in 'Kawasaki 250cc In-line 4's' started by zixxer, Jul 14, 2014.

Page 1 of 2
  1. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    Thought i would make a thread for this instead of hijacking other threads. Just finished checking all my valves and all exhaust valves are way out of spec, 3 valves had non existent clearance and all the others were well below spec, but all inlets are perfectly in the middle of the spec range.

    what could be causing this as i have had exhaust shims changed before.
     
    zixxer, Jul 14, 2014
    #1
  2. Mclaren

    Mclaren Well-Known Member Contributing Member

    Messages:
    1,971
    Likes Received:
    939
    Trophy Points:
    698
    Joined:
    Jul 31, 2013
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    cbr250rr
    Mayb something up with valves them selves
     
    Mclaren, Jul 14, 2014
    #2
  3. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

    Messages:
    2,428
    Likes Received:
    1,173
    Trophy Points:
    823
    Joined:
    Jul 1, 2013
    Gender:
    Male
    Occupation:
    Dispatch Manager
    Location:
    Beenleigh
    My Bike:
    NONE
    some kind of oil starvation up there? how often do you change your oil i have heard this can have an effect.
     
    • Like Like x 1
    Th3_Huntsman, Jul 14, 2014
    #3
  4. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    every 3000 odd k's give or take afew hundred, definitely going to replace them then check them again in 500 kays or so to see if there is a valve problem, just dont know what shims to use since i cant measure clearance, im guessing i just put in a shim that is .3mm less then recheck it and just replace it again if necessary.
     
    zixxer, Jul 14, 2014
    #4
  5. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

    Messages:
    2,428
    Likes Received:
    1,173
    Trophy Points:
    823
    Joined:
    Jul 1, 2013
    Gender:
    Male
    Occupation:
    Dispatch Manager
    Location:
    Beenleigh
    My Bike:
    NONE
    also did you check them stone cold as in not run the engine IE overnight?
     
    Th3_Huntsman, Jul 14, 2014
    #5
  6. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    yeah mate
     
    zixxer, Jul 14, 2014
    #6
  7. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

    Messages:
    2,428
    Likes Received:
    1,173
    Trophy Points:
    823
    Joined:
    Jul 1, 2013
    Gender:
    Male
    Occupation:
    Dispatch Manager
    Location:
    Beenleigh
    My Bike:
    NONE
    Good stuff thought I'd check as that could have been the difference. Mmmm
     
    Th3_Huntsman, Jul 14, 2014
    #7
  8. Mclaren

    Mclaren Well-Known Member Contributing Member

    Messages:
    1,971
    Likes Received:
    939
    Trophy Points:
    698
    Joined:
    Jul 31, 2013
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    cbr250rr
    Feeler gauge to check cost couple bucks any tool shop and 0-25mm micrometer to measure shims prob 50 odd bucks can use for other things like discs

    .3 is a lot mate
     
    Mclaren, Jul 14, 2014
    #8
  9. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    standard clearance should be 0.2-0.3 for exhaust valves, so will have to go 0.3mm less than what i have in there now then recheck and change again if need be. Just need to get a shim kit and torque wrench, local tool shop i use have some but there cheapest is 250 dollars, may aswell just send my bike to the mechanic for that dough.
     
    zixxer, Jul 15, 2014
    #9
  10. Mclaren

    Mclaren Well-Known Member Contributing Member

    Messages:
    1,971
    Likes Received:
    939
    Trophy Points:
    698
    Joined:
    Jul 31, 2013
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    cbr250rr
    Can get cheap ones mate but if u strip bike so mechanic does minimal work would cost less than 300
     
    • Like Like x 1
    Mclaren, Jul 15, 2014
    #10
  11. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

    Messages:
    2,428
    Likes Received:
    1,173
    Trophy Points:
    823
    Joined:
    Jul 1, 2013
    Gender:
    Male
    Occupation:
    Dispatch Manager
    Location:
    Beenleigh
    My Bike:
    NONE
    Send the specs needed to precision shims.
     
    • Like Like x 1
    Th3_Huntsman, Jul 15, 2014
    #11
  12. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    Have some time off work and hopefully everything goes smooth so i can get this done before the weekend.

    got the cams out and took out the buckets and discovered the person who done it before put the shims number side down just too make it that little bit harder, probably the same dude who put the jets in wrong.

    hopefully get the cams on later so i can check the clearances again and do another shim run if needed, then fire it up tomorrow.
     
    zixxer, Jul 17, 2014
    #12
  13. kiffsta

    kiffsta Senior Member

    Messages:
    9,066
    Likes Received:
    6,872
    Trophy Points:
    1,168
    Joined:
    Aug 7, 2010
    Gender:
    Male
    Location:
    Brisbane
    my 2c, make sure you put the right cam in the right place, they look similar, but they are different, its listed in the manual.

    Chris
     
    kiffsta, Jul 17, 2014
    #13
  14. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250

    i actually left the intake cam in to hold the chain up as i had no shims to do on that side, got it all back together with the right shims and clearances are all good now.

    for anyone who wants to do valve clearances with a timing chain, mark your chain and timing gear with a permanent marker too make getting it back together easier.
     
    • Like Like x 1
    zixxer, Jul 17, 2014
    #14
  15. Phil

    Phil Senior Member Contributing Member

    Messages:
    3,613
    Likes Received:
    1,549
    Trophy Points:
    923
    Joined:
    Aug 8, 2010
    Gender:
    Male
    Occupation:
    M C E
    Location:
    Sunshine Coast Qld
    Home Page:
    My Bike:
    Suzuki GT250X7 Kawasaki ZZR600
    Good thinking mate, glad to hear your sorted at last, time to enjoy your bike :thumb_ups:
     
    • Like Like x 1
    Phil, Jul 17, 2014
    #15
  16. Mclaren

    Mclaren Well-Known Member Contributing Member

    Messages:
    1,971
    Likes Received:
    939
    Trophy Points:
    698
    Joined:
    Jul 31, 2013
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    cbr250rr
    Start good now?
     
    Mclaren, Jul 17, 2014
    #16
  17. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    thanks phil, got it started and it started straight up and idled good,no choke needed. Engine sounds abit healthier and the exhaust note does aswell.

    had to take .4mm off #4 cylinder, hopefully the valves are all good dont want to go down that route.
     
    • Like Like x 3
    zixxer, Jul 17, 2014
    #17
  18. cal

    cal Well-Known Member Premium Member

    Messages:
    587
    Likes Received:
    461
    Trophy Points:
    248
    Joined:
    Aug 17, 2013
    Gender:
    Male
    Occupation:
    Mechanic
    Location:
    Perth, WA
    My Bike:
    Kawa '88 ZXR250A / 86' BMW K100. 1992 VFR400R
    good work mate!
     
    cal, Jul 17, 2014
    #18
  19. zixxer

    zixxer Well-Known Member

    Messages:
    457
    Likes Received:
    171
    Trophy Points:
    248
    Joined:
    Jan 26, 2014
    Gender:
    Male
    Location:
    Sydney, Australia
    My Bike:
    zxr250
    also to anyone who wants to do this follow this video, breaks it down and makes it very straightforward and is pretty much exactly what you have to do on the old 250's.





     
    • Like Like x 2
    zixxer, Jul 18, 2014
    #19
  20. edwardo

    edwardo Well-Known Member Contributing Member

    Messages:
    373
    Likes Received:
    192
    Trophy Points:
    273
    Joined:
    Feb 21, 2012
    Gender:
    Male
    Occupation:
    Teacher
    Location:
    Adelaide
    My Bike:
    srx250
    Just saw this thread as I think my bike may be due for valve clearances. Just a question though, last time I had my rocker cover off, the spark plug o rings were shot (still are) and they are leaking. I can't for the life of me find replacements even looking for balius o rings. Any one know of alternatives? Does anyone have accurate diameter so I can try and find similar ones off another bike? Mine are beyond recognisable!
     
    edwardo, Aug 13, 2014
    #20
Page 1 of 2

Share This Page