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Thread: compression

  1. #1
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    compression

    i had an extra gx200 clone head lying around.i then had the head milled .025(can anyone tell me my compression is?) and put it on and and it does not run as well as it used to(idles higher too) can anyone tell me what i will have to do/mod any advice will help.

  2. #2
    Senior Member milo raptors's Avatar
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    go to NR racineg they have a compress chart

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    Banned Strigoi's Avatar
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    Quote Originally Posted by milo raptors View Post
    go to NR racineg they have a compress chart
    here's a link. click the GX200 compression chart link and it will prompt you to download an Excel file.

    NR-Racing.com

  4. #4
    Senior Member novaracer's Avatar
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    Quote Originally Posted by ericmelia View Post
    i had an extra gx200 clone head lying around.i then had the head milled .025(can anyone tell me my compression is?) and put it on and and it does not run as well as it used to(idles higher too) can anyone tell me what i will have to do/mod any advice will help.
    may be sucking in air from somewere. will it adjust down and not stall when u ride it?

  5. #5
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    i am pretty sure it is not leaking anywhere i am trying to figure out where the needles are to mess around with them but i dont know where to start can any one direct me to where i can find a diagram or an exploded view it would help a lot thanks

  6. #6
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    o i know i have to adjust the idle screw and it only stalls some times when cold or warm mostly cold thow

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    Quote Originally Posted by ericmelia View Post
    i am pretty sure it is not leaking anywhere i am trying to figure out where the needles are to mess around with them but i dont know where to start can any one direct me to where i can find a diagram or an exploded view it would help a lot thanks
    if you're running a stock carb it doesn't have a needle.

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    ya i do have the stock carb but i will soon be switching to a 22mm keihin as soon as i get the adaptor

  9. #9
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    what octane of gas do you guys think i should be runnning 97 or 91 or 89

  10. #10
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    you should be fine with 91.

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