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  1. #21
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    Quote Originally Posted by JIM'S PERFORMANCE View Post
    Quote Originally Posted by Mike H View Post
    Ok so who else is going to pull their cams out and check the run out to see if we can back this up with anyone else's findings. It would be extremely interesting to check those who have broke more then one chain.....
    My only question is did we catch a chain from breaking in time i do not know did we get lucky and just stumble on the issue or something very rear. I would say someone who has broke a chain would be a great candidate to take the cams out and have them check out.
    Completely agree!


  2. #22
    rxpdoo's Avatar
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    Quote Originally Posted by wolf714 View Post
    Quote Originally Posted by rxpdoo View Post
    for every crank revolution you only see 1/3 of cam movement.
    huh??? Lol.
    yes 1/2 camshaft for 1 crank rev. Thx for correcting me...

  3. #23
    incognito's Avatar
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    Next time I check chain I'll pull a middle cam bearing cap off and put a dial gauge on it and turn over motor.

  4. #24
    THE PLATE MAN JIM'S PERFORMANCE's Avatar
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    Quote Originally Posted by Toofast4you View Post
    Next time I check chain I'll pull a middle cam bearing cap off and put a dial gauge on it and turn over motor.
    Does not work that way the other caps are holding the rest of the cam down, only way to check is have cam out and put on a lathe were both ends are held or regrind machine.

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  6. #25
    i just checked my cams with my coors light and they came out goood bwahahahaha

    reaaly though thanks on this i was like i cant believe cars etc run on a belt and w are snappin chains

  7. #26
    Guidoo's Avatar
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    So if I'm understanding this correctly the cam is not "flat". If that's the case wouldn't the cam saddle show signs of the cam "whipping" and burning up the saddle(s)? I could see the sprocket flange(s) not being true allowing the chain to become over tighten.

  8. #27
    Quote Originally Posted by Guidoo View Post
    So if I'm understanding this correctly the cam is not "flat". If that's the case wouldn't the cam saddle show signs of the cam "whipping" and burning up the saddle(s)? I could see the sprocket flange(s) not being true allowing the chain to become over tighten.

    Sounds more to me like it is oblong.

  9. #28
    incognito's Avatar
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    Cool

    Cam is not "true"...its "bent",and yes that would make the cam bearing "saddles" wear unevenly on edges,also it would make cam sprocket "wobble",which obviously would effect cam chain.....I propose a New Poll!!who has a "Bent Camshaft "...

  10. #29
    Ive heard so many theories already about why the chain fails that i dont even know what to think anymore. If this is the true reason why the cam chains are breaking and causing several units to fail then that is a MAJOR quality control fuck up on yamahas part.

  11. #30
    incognito's Avatar
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    DITTO!!

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