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Thread: engine NOISE!! help

  1. #1
    Join Date
    Mar 2010
    Location
    zanesville ohio united states
    --
    21

    engine NOISE!! help

    hey guys . i just restored an 85 250 sx, everything but the internals of the engine. my problem is when i got it running i have this LOUD constant ticking/taping. imo it sounds like the timing chain or cam chain which ever you prefer to call it. or could it be the valves? chain tensioner worn out along with chain and slaping around? just wondering if it's somewhat common noise/thing to happen to this model or any of you have had one and experienced the same thing and what the problem actually was?the noise is there throughout the rpm range but is loudest and most noticable at idle. any help would be GREATLY APPRECIATED. thanks in advance. maxima

  2. #2
    Join Date
    Dec 2007
    Location
    Quebec,Canada
    --
    1,014
    valve/rocker/cam, timming chain,connecting rod,wirst pin,piston skirt....

    1986 ATC500X
    1985 ATC250SX
    1985 ATC200X
    1985 ATC250R
    1986 ATC250R
    1984 ATC250R
    1981 ATC70
    1984 ATC70
    1985 ATC70
    Custom built ATC70 / 250R laydwon swap
    1986 ATC250SX FATCAT

  3. #3
    Join Date
    Mar 2010
    Location
    zanesville ohio united states
    --
    21
    guess i'll just have to teardown,inspect and measure. i was just dreaming that after all the time i spent making the outside shiny and new again that the inside wouldn't need the same attention. i really do think it's the chain though. i shall see and report my progress.

  4. #4
    Join Date
    Apr 2010
    Location
    KC, MO
    --
    64
    valve clearance my friend start there then work your way down if your chain tensioner is all the way in I would say the timing chain is on its last leg
    " Remember .... Women leave, money burns, friends, memories and scars are the only things that truly last forever... and yes that is one of the original General Lees from the series "

  5. #5
    Join Date
    May 2010
    Location
    tijuana mexico
    --
    17
    first check the valves calibration.

  6. #6
    Join Date
    Mar 2010
    Location
    zanesville ohio united states
    --
    21
    thanks fellas. will do and let ya know

  7. #7
    Join Date
    Jul 2006
    Location
    western ny
    --
    3,366
    thats valve tapping for sure .. re gap the valves and u will be rollin in no time ..
    down to parts because i no longer have a place to ride trikes.

    GIT IT RAAAGGGGG !!!!

  8. #8
    Join Date
    Mar 2010
    Location
    Crest California
    --
    3,014
    Yeah, my vote goes to valve tapping.
    LED obsessed
    2015 Yamaha FJ-09

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