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Old 11-20-2009, 08:08 PM   #1 (permalink)
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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.
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Old 11-20-2009, 09:44 PM   #2 (permalink)
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go to NR racineg they have a compress chart
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Old 11-20-2009, 11:33 PM   #3 (permalink)
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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
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Old 11-23-2009, 07:38 PM   #4 (permalink)
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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?
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Old 12-04-2009, 10:09 PM   #5 (permalink)
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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
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Old 12-04-2009, 10:13 PM   #6 (permalink)
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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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Old 12-05-2009, 12:15 AM   #7 (permalink)
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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
if you're running a stock carb it doesn't have a needle.
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Old 12-05-2009, 09:12 PM   #8 (permalink)
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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
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Old 12-15-2009, 07:51 PM   #9 (permalink)
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what octane of gas do you guys think i should be runnning 97 or 91 or 89
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Old 12-15-2009, 08:37 PM   #10 (permalink)
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you should be fine with 91.
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