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Thread: honda atc 200M updating problems carb !!!!

  1. #1
    Join Date
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    honda atc 200M updating problems carb !!!!

    hello i am rebuilding my 84 honda atc 200 m , with a WISECO 10.25: 1 , a UNO air filter and a black DG exhaust, i know that the main jet original is a 95 but i would like to know what size of jet I must use for this .....Thank you for your help ...!

  2. #2
    125Mmadness's Avatar
    125Mmadness is offline At The Back Of The Pack Arm chair racerFirst time rider
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    It depends on your elevation but, I would start with a 200x carb because it is 2mm bigger and will suit your mods well. What is your elevation?
    1985 ATC125M: Parts
    1985 ATC200S: 84 200S Bottem end, 200x Head, 200x Carb, S&S Cycle Exhaust, Wiseco 10.25:1 Piston, Reground Cam with About 1mm more lift(unknown specs).
    1988 TRX250X
    1983 ATC200E: Total Pile.


    "Bout Tree Fiddy" Master of Thy 22RE

  3. #3
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    100 meters only ..! i bought a new mukini carb on eBay so when i full throttle the motor run out !

  4. #4
    Join Date
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    You bought the same size carburetor as a replacment? Was the origional a Keihn, just asking.

  5. #5
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    yes it's the same 22 mm , original is KEIHIN ...

  6. #6
    barnett468 is offline FACT ! I have no edit button Arm chair racerThe day begins with 3WW
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    If you are using the original factory carb, I would try a 110 then try different positions on the needle clip and check plug color after after around 20 minutes as long as it runs decent. I would also possibly try a one size bigger pilot jet.


    PREVIOUS KAWASAKI INTERNATIONAL R & D PROJECT ENGINEER AND ATV DEPARTMENT SUPERVISOR AND THE ONLY PERSON ON 3WW WITHOUT AN EDIT BUTTON OR A STAR

  7. #7
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    yes original carb ( but i have a new mukini from eBay here) i ordered 100 ,105 and 110 ,118 pilot jet ( i have only 3660 full rpm)
    Last edited by superjeff97500; 11-06-2017 at 11:39 PM.

  8. #8
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    Aren't the Pilot jet sizes for Mikuni much small for the Keihin Equvilent? So like a 38 Keihin pilot jet is a Mikuni size 17 or something?

  9. #9
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ID:	247496hello i have a new carb (JIELLI 27mm on ebay) is it better or should I keep the old one? if i use a new jielli 27 mm carb ,what pilot jet should i use please??? (video with 118 main jet )
    -https://www.ebay.fr/itm/Carburetor-FITS-HONDA-ATC200M-ATC-200-M-1984-1985-NEW-Carb/270920908086?hash=item3f1424fd36:g:5eEAAOSwPe1T6kh b

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    Last edited by superjeff97500; 11-25-2017 at 11:50 AM.

  10. #10
    Join Date
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    Good evening I tried everything with my carburetor JIELI ebay but nothing goes to the nozzle 128, I dropped and I come back with my original carburetor ..!

  11. #11
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    With the oem carb the 105 main jet i have 6000 rpm . the motor run good ...! is this correct ?

  12. #12
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    it' s no good very bad i must change my carb for higher what's size ??

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