Jetting Database
  • User avatar
    hazard88
    Posts: 64
    Joined: Sun Apr 13, 2008 3:52 am

    by hazard88 » Thu Aug 18, 2011 3:49 pm

    Year: 2006
    Elevation: 500-6000
    Temperature Range: 32-110
    Smog (AIS): Applied Block off
    Airbox Modified Sides: Yes
    Backfire Screen: Removed
    Air Filter: NoToil Superflow
    Pilot Jet: 48
    Main Jet: 168
    Needle: JD Red
    Needle Clip Position: 4th
    Fuel Screw Type: R&D Flex
    Fuel Screw Setting: 2 1/4 turns
    AP Modified: Thick o ring
    Leak Jet: 55
    AP Cover: Boysen
    Exhaust Type: FMF Powerbomb, White Bros E2 w/sa
    Exhaust Modified: Yep
    Pink Wire Modified: Yes
    Cam: HotCams Stage 1
    _________________
  • latelearner
    Posts: 2
    Joined: Thu Feb 09, 2012 1:24 pm

    by latelearner » Fri Jun 15, 2012 12:00 pm

    Year: 2012
    Elevation: 50-1000
    Temperature Range: 50-80 F
    Smog (AIS): applied block off kit
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: gone
    Air Filter: power flow
    Pilot Jet: stock 45
    Main Jet: 165
    Needle: NCVS
    Needle Clip Position: 3
    Fuel Screw Type: stock modified
    Fuel Screw Setting: 1 1/2
    AP Modified: no
    Leak Jet: stock 70
    AP Cover: stock
    Exhaust Type: stock header
    Exhaust Modified: pro circuit t4 slip on
    Pink Wire Modified: no
  • Harley
    Posts: 8
    Joined: Sat Mar 15, 2008 5:58 pm

    by Harley » Thu Feb 28, 2013 8:52 pm

    Year: 2009
    Elevation: 2500-6000ft
    Temperature Range: 50-90F
    Smog (AIS): Applied block off
    Airbox Modified Top: Yes
    Airbox Modified Sides: No
    Backfire Screen: Removed
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 165
    Needle: NCVS
    Needle Clip Position: 3
    Fuel Screw Type: R & D Flex
    Fuel Screw Setting: 2 turns
    AP Modified: Its an 09
    Leak Jet: Stock
    AP Cover: Stock
    Exhaust Type: FMF Mega bomb header
    Exhaust Modified: no
    Pink Wire Modified: no
    Suspension Mod: Yes, kouba CRF4 lowering link
    Honda 1983 V-65 Magna
    Honda 2008 XR650L
    Honda 2000 CR500R
    Honda 2008 CRF250X
    Honda 2004 CRF230F
    Honda 2009 CRF450X
  • User avatar
    mpcv2000
    Posts: 10
    Joined: Sat Jul 13, 2013 3:22 am

    by mpcv2000 » Wed Jul 31, 2013 2:48 am

    Year: 2007
    Elevation: 50-800ft
    Temperature Range: 50-90F
    Smog (AIS): Custom block off plate
    Airbox Modified Top: Yes
    Airbox Modified Sides: Yes
    Backfire Screen: Removed
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 165
    Needle: Stock
    Needle Clip Position: N/A
    Fuel Screw Type: stock
    Fuel Screw Setting: 2 turns
    AP Modified: 2008 Diaphragm
    Leak Jet: # 40
    AP Cover: 2008+
    Exhaust Type: Stock
    Exhaust Modified: no
    Pink Wire Modified: no
    Suspension Mod: Stock
    Martin !
    The men's cave..
  • randy nix
    Posts: 7
    Joined: Sat Apr 20, 2013 10:32 am

    by randy nix » Sun Nov 24, 2013 7:10 pm

    Year: 2008
    Elevation: 500 - 3000
    Temperature Range: 50 - 110
    Smog (AIS): no
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: yes
    Air Filter: DT-1
    Pilot Jet: 42
    Main Jet: 185
    Needle: stock
    Needle Clip Position: 4th pos. from bottom
    Fuel Screw Type: moose
    Fuel Screw Setting: 2 out
    AP Modified: no
    Leak Jet: not sure
    AP Cover: stock
    Exhaust Type: yoshimura
    Exhaust Modified: no
    Pink Wire Modified: no

    05 450r cam
    05 450r carb
    PC Ported R head
    Del West valves
  • User avatar
    Kyle450x
    Posts: 211
    Joined: Sat Dec 12, 2009 10:51 am

    by Kyle450x » Mon Dec 16, 2013 11:45 am

    Year: 2005 crf450x
    Elevation: 0-3000
    Temperature Range: 60-100
    Smog (AIS): Applied block off kit
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: removed
    Air Filter: Twin Air with backfire resistant coating
    Pilot Jet: 48
    Main Jet: 170
    Needle: JD red
    Needle Clip Position: 4
    Fuel Screw Type: R&D Flex Jet (awesome!!!)
    Fuel Screw Setting: 2.0 turns out
    AP Modified: stock
    Leak Jet: 50
    AP Cover: updated honda
    Exhaust Type: Pro Circuit RC-5 header with T-4 muffler
    Pink Wire Modified: no


    2002 CRF450R cam, TRX intake valves, 12.5:1 CP piston, Hot Rods crank.
  • advbedouin

    2013 CRF450X Jetting & setup

    by advbedouin » Wed Oct 28, 2015 9:44 am

    Year: 2013 crf450x
    Elevation: 0-5000
    Temperature Range: 50-80
    Smog (AIS): AppliedRacing block off kit
    Airbox Modified Top: No
    Airbox Modified Sides: Yes
    Backfire Screen: Stock/Installed
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 170
    Needle: NCVS
    Needle Clip Position: 4th pos. from top
    Fuel Screw Type: R&D Flex Jet
    Fuel Screw Setting: 1-1.5 turns out
    AP Modified: stock
    Leak Jet: Stock
    AP Cover: Stock
    Pink Wire Mod: Yes
    Exhaust Type: ProCircuit T-4 muffler
    Pink Wire Modified: Yes
  • User avatar
    CRF250XRider
    Posts: 28
    Joined: Sat Dec 20, 2008 6:33 pm

    by CRF250XRider » Thu Nov 12, 2015 1:51 pm

    Year: 2005
    Elevation: 500-2000
    Temperature Range: 50-95F
    Smog (AIS): unknown
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: removed - Twin Air cage
    Air Filter: Twin Air
    Pilot Jet: 47
    Main Jet: 168
    Needle: unknown/stock?
    Needle Clip Position: middle
    Fuel Screw Type: unknown
    Fuel Screw Setting: about 2 out
    AP Modified: no
    Leak Jet: unknown/stock?
    AP Cover: unknown/stock?
    Exhaust Type: FMF 4.1Ti complete system, no spark arrestor
    Exhaust Modified: NA
    Pink Wire Modified: No
    Fuel: 110 octane
    You're not at fast as you used to be, but you're not as slow as you're going to be.
    05 CRF250X (my bike)
    05 CRF450X/R (my new bike)
    13 CRF250R (son's bike)
  • BSS
    Posts: 1
    Joined: Wed Sep 16, 2015 6:54 am

    by BSS » Mon Nov 30, 2015 11:26 am

    Year: 2009
    Elevation: Sea level-600
    Temperature Range: 50-95F
    Smog (AIS): Applied racing
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: removed
    Air Filter: Twin Air
    Pilot Jet: 45
    Main Jet: 170
    Needle: JD Jetting red needle
    Needle Clip Position: 5th
    Fuel Screw Type: Crfs only
    Fuel Screw Setting: 2 1/4
    AP Modified: no
    Leak Jet: stock
    AP Cover: stock
    Exhaust Type: FMF Q4 Hex
    Exhaust Modified: Yes
    Pink Wire Modified: No
    Fuel: 93 non ethanol
  • jrlastofthebreed
    Posts: 3
    Joined: Sat Jul 15, 2017 2:00 pm

    Re: Jetting Database

    by jrlastofthebreed » Sat Jan 06, 2018 4:20 pm

    Year:2007 with timbersled
    Elevation:4000-7000
    Temperature Range:-20F to 40F
    Smog (AIS): Blocked off
    Airbox Modified Top: Yes
    Airbox Modified Sides: Cut open
    Backfire Screen: installed
    Air Filter: mesh screen
    Pilot Jet:48
    Main Jet:172.5
    Needle: Blue
    Needle Clip Position:5th from top
    Fuel Screw Type: Flex Jet
    Fuel Screw Setting: +/- 2 turns out
    AP Modified: yes
    Leak Jet: R&D bowl (Way worth it, Its awesome)
    Exhaust Type: FMF power bomb header, FMF Q4 Hex Exhaust
    Exhaust Modified: no
    Pink Wire Modified: no
    Cam: Stage 2 Hot Cam
    Piston: 12.5 to 1 Wiesco Piston
    Valves: Stainless Valves
    Fuel: 91 non ethanol

    Note: May go to a 175 main jet. Its just a little lean. Rather have a little rich.
  • User avatar
    thatowensbloke
    Posts: 10
    Joined: Fri Jul 05, 2019 5:42 pm

    Re: Jetting Database

    by thatowensbloke » Sun Aug 21, 2022 6:34 pm

    not sure what happened here, i definitely posted this a couple years back:

    Year: 2005 (Aussie Spec)
    Elevation: Sea Level to 1000 meters
    Temperature Range: 10C to 45C
    Smog (AIS): n/a
    Airbox Modified Top: Yes, Cut Out
    Airbox Modified Sides: Yes, Cut Out
    Backfire Screen: Removed
    Air Filter: Funnelweb
    Pilot Jet: 45
    Main Jet: 165
    Needle: OEM
    Needle Clip Position: 5th clip from top (2 lower than factory)
    Fuel Screw Type: XRs Only
    Fuel Screw Setting: 1 3/4 turns
    AP Modified: No
    Leak Jet: OEM
    AP Cover: Boysen QuickShot 2
    Exhaust Type: Stock Header, Yoshi Slipon
    Exhaust Modified: .....yes?
    Pink Wire Modified: Yes, moved to blank slot in plug.
    '05 450X with all the usual bits on it.

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