Jetting Database
  • jms130
    Posts: 11
    Joined: Fri Mar 22, 2013 1:07 pm

    by jms130 » Fri Apr 19, 2013 9:25 pm

    Year: 2004
    Elevation: 800 feet to 3,350
    Temperature Range: 35-95F
    Airbox Modified Top: Stock
    Backfire Screen: stock
    Air Filter: UNI
    Pilot Jet: 45
    Main Jet: 120
    Needle: stock adjustable
    Needle Clip Position: 3rd
    Fuel Screw Type: CRFsOnly
    Fuel Screw Setting: 1.75
    Exhaust Type: BBR
    Exhaust Modified: Quiet insert
  • JD
    Posts: 396
    Joined: Wed Oct 26, 2005 8:17 pm

    by JD » Sun May 12, 2013 12:43 pm

    Year: 2006
    Elevation: 3000-6000' Standard Riding (7000-10,000' Mammoth Area)
    Temperature Range: 30-85F
    Airbox Modified Top: Removed
    Backfire Screen: In Place
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 110
    Needle: Power Up
    Needle Clip Position: Middle
    Fuel Screw Type: Stock
    Fuel Screw Setting: 1 turn out from seat
    Exhaust Type: Stock
    Exhaust Modified: Baffle in, but end plate cut off
  • js0102
    Posts: 17
    Joined: Fri Dec 07, 2012 1:30 pm

    by js0102 » Mon Jan 20, 2014 9:24 am

    Year:2013
    Elevation:1200
    Temperature Range:20-90f
    Airbox Modified Top:removed
    Backfire Screen:in place
    Air Filter:k&n
    Pilot Jet:45
    Main Jet:120
    Needle:03-05 c39a
    Needle Clip Position:4th from top
    Fuel Screw Type:crfsonly fuel screw
    Fuel Screw Setting:2 1/8 turns out
    Exhaust Type:yoshimura full system
    Exhaust Modified:
    Mods:03-05 crf150f webcam grind 40mc/402,weisco hi-comp piston
  • User avatar
    VortecCPI
    Posts: 41
    Joined: Mon Jan 18, 2010 10:06 am

    by VortecCPI » Mon Jan 26, 2015 10:26 am

    js0102 wrote:Year:2013
    Elevation:1200
    Temperature Range:20-90f
    Airbox Modified Top:removed
    Backfire Screen:in place
    Air Filter:k&n
    Pilot Jet:45
    Main Jet:120
    Needle:03-05 c39a
    Needle Clip Position:4th from top
    Fuel Screw Type:crfsonly fuel screw
    Fuel Screw Setting:2 1/8 turns out
    Exhaust Type:yoshimura full system
    Exhaust Modified:
    Mods:03-05 crf150f webcam grind 40mc/402,weisco hi-comp piston

    This is the mike coe jetting specs and the cam he recommended me for my riding style. And its spot on amazing.



    Do you have any trouble with detonation with the cam and piston you're using?
    2009 CRF230F | (1) BBR fork spring | Bruce Triplett damper rods | ED11 / VE-33 tires | EO Outlaw exhaust system | Fox Podium X shock | Procom CDI | Stock bars | Stock carb | Stock head | UNI air filter | Web 40mc/402 (340/402) | Wiseco 4816M06550
  • User avatar
    VortecCPI
    Posts: 41
    Joined: Mon Jan 18, 2010 10:06 am

    by VortecCPI » Mon Jan 26, 2015 10:28 am

    Year: 2009
    Elevation: 750 ft above sea level
    Temperature Range: 40'F - 100'F
    Airbox Modified Top: Snorkle Removed
    Backfire Screen: Still In
    Air Filter: UNI
    Pilot Jet: 48
    Main Jet: 110
    Needle: 03-05 Needle
    Needle Clip Position: 4th
    Fuel Screw Type: 2005
    Fuel Screw Setting: Depends on temperature
    Exhaust Type: Stock + Engines Only PoweRing
    2009 CRF230F | (1) BBR fork spring | Bruce Triplett damper rods | ED11 / VE-33 tires | EO Outlaw exhaust system | Fox Podium X shock | Procom CDI | Stock bars | Stock carb | Stock head | UNI air filter | Web 40mc/402 (340/402) | Wiseco 4816M06550
  • rasecarz
    Posts: 1
    Joined: Mon Jan 06, 2014 7:35 pm

    by rasecarz » Mon Jan 30, 2017 10:55 am

    Year:2012
    Elevation: 1000-1600 ft above MSL
    Temperature Range:60F-90F
    Airbox Modified Top:Snorkel removed
    Backfire Screen:in place
    Air Filter: Uni
    Pilot Jet:48
    Main Jet:118
    Needle: C39a 03'-05' 16012-KPS-901
    Needle Clip Position: 4th
    Fuel Screw Type: OEM
    Fuel Screw Setting:
    Exhaust Type: OEM
    Exhaust Modified: Drilled baffle ( Ramsey style)

    Pro-Com CDI
  • 19' CRF230
    Posts: 1
    Joined: Thu Feb 21, 2019 2:02 pm

    Re: Jetting Database

    by 19' CRF230 » Thu Feb 21, 2019 2:10 pm

    Year: 2019
    Elevation: 0-1,000ft above sea level
    Temperature Range: 30F to 100F
    Air box Modified Top: snorkel removed
    Backfire Screen: still in
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 120
    Needle: 03'-05' needle
    Needle Clip Position: 4th from top
    Fuel Screw Type: stock
    Fuel Screw Setting: 1.75 out
    Exhaust Type: stock
    Exhaust Modified: baffle removed


    Just a sweet tune. Great snap. Instant start with less than 30 seconds of choke.

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