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Thread: need ATC70 valve clearance specs!

  1. #1
    whipit is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Dec 2002
    --
    374

    need ATC70 valve clearance specs!

    anyone got 'em handy? thanks in advance

  2. #2
    Join Date
    Dec 2004
    Location
    Baltimore, MD
    --
    6,088
    .05mm or .002in on the valve tappet clearance.

  3. #3
    Join Date
    Feb 2006
    Location
    Central Florida
    --
    1,090

    compression stroke tdc tappet

    please explain..

    piston at top - goes down the intake valve opens stroke 1
    comes back up as the intake valve closes comression stroke TDC? stroke 2
    goes down again - power stroke- stroke 3
    comes back up releasing exhaust - ( also TDC ) stroke 4

    when you adjust the valves do you do it at TDC between strokes 2 and 3?
    book says at tdc on the compression stroke.

    i just did this and - when i turn over the piston 2 strokes to get to the top of the cycle - the rockers are loooooose! when it comes back around to tdc of the compression stroke they are on the money.

    is this right? thanks

    ok- im an idiot - thought the intake valve was the exhaust for a min there HA HA

    now i got it right according to the book - but at the top of the exhaust stroke the intake valve is not fully closed. ev erything else checks out - and im baffled. doesnt sound right........

    UPDATE - doesnt seem to matter about the intake valve - it runs - so maybe its normal
    Last edited by rally4x4racer; 05-13-2006 at 11:40 AM.
    quiet people seem intelligent

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