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Thread: spark plug

  1. #1
    Join Date
    Jul 2009
    Location
    chicago
    --
    17

    spark plug

    i have a 84 atc 250r and its bogging mid throttle somone told me to do a plug chop what is the correct way to do this i heard several diff ways please help

  2. #2
    Join Date
    Apr 2009
    Location
    Parker, CO
    --
    607
    look in the world class help section and read the jetting thread by . Good Luck.

  3. #3
    Join Date
    Jun 2004
    Location
    Oregon
    --
    1,779
    Clean your carb and check your needle
    1986 ATC 250R
    Ported w/ Cool head
    LED pipe and silencer.
    Vforce3
    Keihin PWK 38mm
    Works Ultra Cross Shock
    LSR +2 Axle
    American Star Racing +4 Swinger
    LED Intake
    Hi-Flite desert seat
    OEM clutch 89 upgrade
    2021 YFZ450Rse Rossier R5 Titanium Header AIS Delete FCI Vortex ECU


  4. #4
    Join Date
    Jul 2009
    Location
    chicago
    --
    17
    i cleaned the carb and its on the second from top should i move it up to the top notch idle good would wrong gas mixture be a part of it bogging md throttle

  5. #5
    Join Date
    Jun 2004
    Location
    Oregon
    --
    1,779
    What plug you using bro? And yes wrong oil ratio could make it bog.. I run 40:1 = 1 16oz bottle of mix to 5 gallons of gas.. Have you tried a leak down? MAybe you sucking in air somewhere in the system..

    Many better people at this that could be helping you tho, It took me over a year to get mine running right lol
    1986 ATC 250R
    Ported w/ Cool head
    LED pipe and silencer.
    Vforce3
    Keihin PWK 38mm
    Works Ultra Cross Shock
    LSR +2 Axle
    American Star Racing +4 Swinger
    LED Intake
    Hi-Flite desert seat
    OEM clutch 89 upgrade
    2021 YFZ450Rse Rossier R5 Titanium Header AIS Delete FCI Vortex ECU


  6. #6
    Join Date
    Jul 2009
    Location
    chicago
    --
    17
    k i am going to dump gas and do a fresh mix with good oil at 40 1 i did a leak test i sprayed starting fluid and carb cleaner all over carb boots and everthingg and idle stayed the same

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