05 CRF450X Jetting/Carb Help
  • wwrob
    Posts:1
    Joined:Wed Mar 11, 2009 11:45 am
    05 CRF450X Jetting/Carb Help

    by wwrob » Wed Mar 11, 2009 12:08 pm

    After reading some posts I thought I would do the AP mod and open the top of the airbox. After doing that, the bike ran very lean and would barely run. I tried a 172 and a 175 main with the fuel screw about 2 turns without success. What am I missing here? Thanks.

    Year: 2005
    Elevation: 0-4000
    Temperature Range: 50 to 90 F
    Smog (AIS): Removed
    Airbox Modified Top: Just opened it to about 4" x 4"
    Airbox Modified Sides: Yes
    Backfire Screen: Removed
    Air Filter: Twin Air System
    Pilot Jet: stk
    Main Jet: 170 (original) move to 172 than 175
    Needle: JD red
    Needle Clip Position: 4th position
    Fuel Screw Type: Zip-ty
    Fuel Screw Setting: 2 turns
    AP Modified: Just did (o-ring)
    Leak Jet: Stock
    AP Cover: QS
    Exhaust Type: Yosh TRC systems
    Exhaust Modified:
    Pink Wire Modified: Yes

    Thanks for your help.

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