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Thread: Hole in the head

  1. #1
    70ATC90's Avatar
    70ATC90 is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Nov 2006
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    Hole in the head

    Well i was working on the exaust from the welding thread and I noticed something... Is this hole supposed to be there?
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    1978 ATC 90
    2001 400EX



  2. #2
    Join Date
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    I think so - 110s are the same way - got me worried once. It is just the way the casting is made.
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  3. #3
    70ATC90's Avatar
    70ATC90 is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Quote Originally Posted by atctim View Post
    I think so - 110s are the same way - got me worried once. It is just the way the casting is made.

    Yeah I know it totally doesn't look natural. That is a 110 also. Theres no oil leaking out of it or anything.
    1978 ATC 90
    2001 400EX



  4. #4
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    Mar 2006
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    Hummm Never seen that , I hope it's nothing !

  5. #5
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    Yes my atc 70's had it as well as my ct70.

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