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Thread: 1977 atc90 looking for manual or timing explanation

  1. 01-17-2012, 05:10 PM #1
    Super350's Avatar
    Super350
    Super350 is offline Got The Holeshot Arm chair racerJust too addicted
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    1977 atc90 looking for manual or timing explanation

    i have a 77 atc90 and im looking for a free downloadable manual or for someone to explain how to set the timing. I had to take the cylinder off so right now the timing chain is off the cam sprocket. I downloaded this one http://www.oscarmayer.net/atc/manuals/ but i cant find anything about doing the timing. thanks

    EDIT: Also the high low range lever seems to be stuck in the low position. i cant push it over to high. I just got this trike so i dont know for sure but it looks like it hasnt run in a LONG time. Any insight on this would be great too!
    Last edited by Super350; 01-17-2012 at 05:43 PM. Reason: added more
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  2. 01-17-2012, 06:13 PM #2
    rdlsz24's Avatar
    rdlsz24
    rdlsz24 is offline Power User Lord of the trike
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    This one was pretty good when I was rebuilding my 110

    http://www.mediafire.com/?1sy3fgmuqu6e8c7

    Rob
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  3. 01-17-2012, 07:40 PM #3
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    Vealmonkey
    Vealmonkey is offline Power User The day begins with 3WW
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    Sometimes with the hi/lo gearbox lever, you have to rock the trike some back and forth to get the lever to switch gears. Remember, you are dealing with a 35 year old machine that not have always been treated the best. Do a search here on the site for downloadable manuals, they are here. It's alot to type out to explain how to put the cam back in and time it.
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  4. 01-18-2012, 06:19 PM #4
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    WilliamJ
    WilliamJ is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Page 57 of that manual you downloaded - the pictures are not very clear and the instructions are a bit brief but it is there. As long as you have your piston at TDC and your cam lobes are pointing down symmetrically your marks should line up.

    Bill
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