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Cam chain is loose after cam removal

Discussion in 'Kawasaki 250cc In-line 4's' started by zixxer, Oct 11, 2014.

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  1. zixxer

    zixxer Well-Known Member

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    hey fellas, removed my cams to do the valve clearances, all went well ( need new valves which did not go well) and i have put the cams back in lined it up perfectly and put in the cam chain tensioner and now have no tension.

    here scratching my head after going over everything, positive it didnt fall off the crank as i had tension on it the whole time and i am positive its not the tensioner as beforehand the chain was tight.

    also if anyone has a cylinder head with valves they want to get rid of for an A model give me a pm.
     
    zixxer, Oct 11, 2014
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  2. Phil

    Phil Senior Member Contributing Member

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    Hey mate
    If you have put everything back together as stated, my only thought is tensioner? Did you retract the tensioner when re-assembling and has the push rod extended fully after that? Tensioners can be fickle at times, would double check it just to be sure. Should the tensioner not extend fully try installing it fully extended, takes a bit of doing but in the absence of another it can get you out of trouble temporarily. Otherwise, I have no idea?
     
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    Phil, Oct 12, 2014
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  3. zixxer

    zixxer Well-Known Member

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    i am scratching my head aswell, i was about to kick the thing yesterday so ill just take the cams out again today, put it back together and see if it fixes itself.
     
    zixxer, Oct 12, 2014
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  4. cal

    cal Well-Known Member Premium Member

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    cam chain could have de-railed off the crank, check that one for sure mate
     
    cal, Oct 12, 2014
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  5. zixxer

    zixxer Well-Known Member

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    my first thought aswell, but after taking wise phils advice i took out the tensioner cleaned it in oil and put it back in and it is now tight again and after turning the crank afew times it all seems good.

    also would anyone know any good sites to look for valves, and also if anyone knows if the a model, c model and balius valves are all the same.
     
    zixxer, Oct 12, 2014
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  6. kiffsta

    kiffsta Senior Member

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    I think I have some spares here, how many do you need ?
     
    kiffsta, Oct 12, 2014
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  7. zixxer

    zixxer Well-Known Member

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    8 exhaust valves mate, all of them are soft and are wearing, got roughly 2000km's before the clearances tightened by .1-.3 so im lead to believe the valves are bad.

    also would i need to take the head to a shop to have the seats machined if this is the case, or could i use a valve seat cutter to clean them up and be on my way.
     
    zixxer, Oct 12, 2014
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  8. kiffsta

    kiffsta Senior Member

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    kiffsta, Oct 12, 2014
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  9. Mclaren

    Mclaren Well-Known Member Contributing Member

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    Bit of grinding paste and bearing blue mate
     
    Mclaren, Oct 12, 2014
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  10. zixxer

    zixxer Well-Known Member

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    lol dont worry i have seen them all and that seems to be the going price, highway robbery, might just wait until something pops up, maybe i will get lucky.

    so you would just need to clean the seat up and use the paste to see if there are leaks between the head and the valve.
     
    zixxer, Oct 12, 2014
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  11. Tim_

    Tim_ resident nutcase Contributing Member Dirty Wheel Club

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    Tim_, Oct 12, 2014
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  12. zixxer

    zixxer Well-Known Member

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    zixxer, Oct 12, 2014
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  13. zixxer

    zixxer Well-Known Member

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    upon closer inspection they are 50 a pop, the pain continues.
     
    zixxer, Oct 12, 2014
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  14. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    I also have an engine i had intended on pulling down.
     
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    Th3_Huntsman, Oct 12, 2014
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  15. Tim_

    Tim_ resident nutcase Contributing Member Dirty Wheel Club

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    Im sure between @Th3_Huntsman , @kiffsta and my self we can help you out..
     
    Tim_, Oct 12, 2014
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  16. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    I will try and pull the head of my spare c model engine thru the week. If you could check to see c model valves are the same before I do so I would appreciate that.
     
    Th3_Huntsman, Oct 12, 2014
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  17. zixxer

    zixxer Well-Known Member

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    the valves have the same part number from the a model, c model and balius so i reckon the valves will be the same, im not sure the cams are the same though.

    appreciate the help as well.
     
    zixxer, Oct 12, 2014
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  18. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Too easy mate i will have a look at em for you.
     
    Th3_Huntsman, Oct 12, 2014
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  19. zixxer

    zixxer Well-Known Member

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    also found valves from china for 120 odd dollars, 8 ex and 8 in, not sure if i can trust them at 19k rpm.
     
    zixxer, Oct 12, 2014
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  20. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    How many of what valves do you need?
     
    Th3_Huntsman, Oct 12, 2014
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