//ArrowChat Code
Results 1 to 5 of 5

Thread: 1983 ATC250R piston help

  1. #1
    Join Date
    Jun 2017
    Location
    Vancouver, wa
    --
    3

    1983 ATC250R piston help

    So i need a new piston for my 1983 atc250r. It has a big bore kit on it but not sure how big. I measured the old piston with my calipers (which are in standard) and converted to metric it reads about 75.4062mm. Im need help finding a replacement piston. What is the cc? Wiseco sizes there piston by .020, .040, .060 over so what do i need?

  2. #2
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,737
    Sooooo, that's an odd measurement. 300 kits std piston is 76mm. The largest over bore for a stock cylinder is 72mm. I would check the measurement again.
    Feedback for yaegerb: Click Here

    Need something blasted or polished or both? Send me a PM

  3. #3
    Join Date
    Jun 2017
    Location
    Vancouver, wa
    --
    3
    Sorry it's an aftermarket cylinder head also

  4. #4
    Join Date
    Mar 2010
    Location
    Slidell, LA
    --
    4,737
    Quote Originally Posted by Mrven157 View Post
    Sorry it's an aftermarket cylinder head also
    Post some pics of the engine/cylinder/head so we can see what we are dealing with.
    Feedback for yaegerb: Click Here

    Need something blasted or polished or both? Send me a PM

  5. #5
    Join Date
    Jun 2017
    Location
    Vancouver, wa
    --
    3
    Ok I will when I get home today. I couldn't really see any identification of any sort on it.

//ArrowChat Integreation Code //