Jetting Database
  • User avatar
    Lars450X
    Posts: 156
    Joined: Mon Sep 08, 2008 8:46 pm

    work in progress...etc

    by Lars450X » Sun Dec 07, 2008 7:41 pm

    Year: 08
    Elevation: 0-4000
    Temperature Range: 40-100
    Smog (AIS): Applied Kit
    Airbox Modified Top: stock
    Airbox Modified Sides: cut door only
    Backfire Screen: yes
    Air Filter: Uni
    Pilot Jet: stock
    Main Jet:165
    Needle: red
    Needle Clip Position:4rd
    Fuel Screw Type: R&D
    Fuel Screw Setting: 2 out
    AP Modified: R&D bowl

    Still a work in progress yet this setup is working very well, i am very happy with this, ran about 30 miles at Stoney, a short run and never once stalled while riding from throttle inputs, which i can't say about the stock setup. Ran very nice. Any suggestions are very welcome.

    Thanks, Lars
    08 CRF450X Plated!
    Factory Connection Suspension
    RD Fuel Bowl, 170 Main/48 pilot
    Red Needle 3rd
    Rekluse Pro w/HD Cover
    Works Rad Braces, Applied smog E-kit
    05 R-Pipe w/moto-billet
    ProBend Cycra's / Moose Eline Carbon Skid
    Tubliss / Scotts Damper
  • dirt clod
    Posts: 152
    Joined: Tue Jul 18, 2006 10:30 am

    by dirt clod » Mon Dec 08, 2008 7:08 am

    Lars, your opinion please on the R&D stuff. Thanks.
    Chris
  • User avatar
    Lars450X
    Posts: 156
    Joined: Mon Sep 08, 2008 8:46 pm

    R and D Bowl

    by Lars450X » Wed Dec 10, 2008 1:09 pm

    So far its been as advertised, with not a single throttle stall or stall at all during riding, compared to stock it stalled all the time, I am happy with the adjustable mix screw also, it makes fine tuning during a ride a breeze. The leak jet adjustment is spot on and give that added adjustment that would otherwise require removing the bowl. Very pleased. Awesome improvements over stock.

    Lars
    08 CRF450X Plated!
    Factory Connection Suspension
    RD Fuel Bowl, 170 Main/48 pilot
    Red Needle 3rd
    Rekluse Pro w/HD Cover
    Works Rad Braces, Applied smog E-kit
    05 R-Pipe w/moto-billet
    ProBend Cycra's / Moose Eline Carbon Skid
    Tubliss / Scotts Damper
  • loff
    Posts: 215
    Joined: Sun Sep 10, 2006 7:20 am

    by loff » Sun Mar 08, 2009 12:11 am

    Year: 2005
    Elevation: 1000-6000
    Temperature Range: 30-95
    Smog (AIS): JB weld
    Airbox Modified Top: Yes
    Airbox Modified Sides: Yes
    Backfire Screen: Stock
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 165
    Needle: JD Red
    Needle Clip Position: 4th clip
    Fuel Screw Type: Factory R&D
    Fuel Screw Setting: 1turn
    AP Modified: JD Power Surge Kit
    Leak Jet: 50
    AP Cover: JD Power Surge Kit
    Exhaust Type: Stock
    Exhaust Modified: Stock
    Pink Wire Modified: No
  • User avatar
    belltownjefe
    Posts: 47
    Joined: Sat Mar 07, 2009 8:22 am

    by belltownjefe » Tue Mar 10, 2009 9:30 pm

    Year: 2008
    Elevation: 4000+
    Temperature Range: 40* - 100*
    Smog (AIS): Applied Racing Block Off Kit
    Airbox Modified Top: Yes
    Airbox Modified Sides: No
    Backfire Screen: Removed
    Air Filter: Stock
    Pilot Jet: 45
    Main Jet: 170
    Needle: NGGQ
    Needle Clip Position: 4th
    Fuel Screw Type: Stock
    Fuel Screw Setting: 2 Turns Out
    AP Modified: No
    Leak Jet: 65
    AP Cover: Stock
    Exhaust Type: XR's Only Gen II Full System
    Exhaust Modified:
    Pink Wire Modified: Yes
  • User avatar
    stsmith5150
    Posts: 39
    Joined: Thu Feb 15, 2007 12:05 pm

    by stsmith5150 » Thu Mar 19, 2009 11:41 am

    Year:2006
    Elevation:0-3000
    Temperature Range:60-90
    Smog (AIS):gone
    Airbox Modified Top:removed boot
    Airbox Modified Sides:cut
    Backfire Screen:gone
    Air Filter:TwinAir with billet cage
    Pilot Jet:48
    Main Jet:170
    Needle:NCVS
    Needle Clip Position:4th
    Fuel Screw Type:ProCircuit
    Fuel Screw Setting:1.5 out
    AP Modified:RD Racing ALJ
    Leak Jet:50
    AP Cover:Yes
    Exhaust Type:FMF Powercore Titanium
    Exhaust Modified:NA
    Pink Wire Modified:no
    2013 CRF450R
  • honda_rules_2005
    Posts: 83
    Joined: Wed Nov 16, 2005 10:41 pm

    by honda_rules_2005 » Sat May 16, 2009 5:08 am

    Year: 2007
    Elevation:
    Temperature Range: 5-45 oC
    Smog (AIS): never had one
    Airbox Modified Top: Yes
    Airbox Modified Sides: yes
    Backfire Screen: removed
    Air Filter: Twin air
    Pilot Jet: 45
    Main Jet: 180
    Needle: JD red needle
    Needle Clip Position: on #6 from top
    Fuel Screw Type: works connection
    Fuel Screw Setting: 2 out
    AP Modified: yep
    Leak Jet: 60
    AP Cover: stock
    Exhaust Type: Pro circuit T4 system
    Exhaust Modified: race
    Pink Wire Modified: Yes
    07 CRF450X
    Pro cercuit T-4 system.
    JD jetting kit,
    Hotcams stage 2 cam,
    CP 13:01 piston,
    Head modified with oversized Billet titanium CRN couted valves allround, ampco45 copper seats and guids with spring set.& also heavilly ported.
  • 450X4LIFE
    Posts: 30
    Joined: Sat Jan 10, 2009 2:16 pm

    by 450X4LIFE » Sun Jun 21, 2009 8:47 pm

    Year: '06
    Elevation: 1500'-5000'
    Temperature Range: 35'-115'deg.
    Smog (AIS): blocked (plugged hoses)
    Airbox Modified Top: cut open
    Airbox Modified Sides: Cut left and right side
    Backfire Screen: gone
    Air Filter: Twin Air fire retardant on stock cage.
    Pilot Jet: 48
    Main Jet: 170
    Needle: NCVS
    Needle Clip Position: 4th
    Fuel Screw Type: RD
    Fuel Screw Setting: 1.5
    AP Modified: no
    Leak Jet: stock
    AP Cover: stock
    Exhaust Type: stock
    Exhaust Modified: removed insert
    Pink Wire Modified: no
    _________________
  • User avatar
    esaresky75
    Posts: 50
    Joined: Wed Mar 11, 2009 1:35 am

    by esaresky75 » Wed Aug 19, 2009 10:15 am

    Year: 2007
    Elevation: 500-2000
    Temperature Range: 45-90
    Smog (AIS): Gone - Toyko Mods
    Airbox Modified Top: Yes
    Airbox Modified Sides: Yes
    Backfire Screen: Removed
    Air Filter: Factory
    Pilot Jet: 48
    Main Jet: 165
    Needle: JD Red
    Needle Clip Position: 4th
    Fuel Screw Type: R&D Flex Jet
    Fuel Screw Setting: 1 7/8-2 turns
    AP Modified: It's an 07
    Leak Jet: Facory
    AP Cover: Factory
    Exhaust Type: Factory
    Exhaust Modified: Spark Arrester & some other thingy removed.
    Pink Wire Modified: No
  • User avatar
    Four-Fifty-X
    Posts: 872
    Joined: Sun Sep 10, 2006 2:15 pm

    by Four-Fifty-X » Wed Aug 19, 2009 3:41 pm

    Year: 2006
    Elevation: 500-6000
    Temperature Range: 55-90
    Smog (AIS): Filled with goop
    Airbox Modified Top: Yes
    Airbox Modified Sides: Yes
    Backfire Screen: Removed
    Air Filter: Twinair flameproof
    Pilot Jet: 48
    Main Jet: 170
    Needle: JD Red
    Needle Clip Position: 4th
    Fuel Screw Type: CRFs Only
    Fuel Screw Setting: 1 1/2 turns
    AP Modified: Thick o ring
    Leak Jet: 55
    AP Cover: Factory
    Exhaust Type: MRD header, Yosh TRC
    Exhaust Modified: Pink Wire Modified: Yes
    Cam: 2003 R
  • G450tech
    Posts: 4
    Joined: Thu Apr 15, 2010 11:48 am

    by G450tech » Tue Apr 27, 2010 10:42 am

    Year: 2006
    Elevation: 1,000-2,000
    Temperature Range: 30-90
    Smog (AIS): N/A
    Airbox Modified Top: NO
    Airbox Modified Sides:NO
    Backfire Screen: INSTALLED
    Air Filter:STOCK
    Pilot Jet: STOCK
    Main Jet: 165
    Needle: STOCK
    Needle Clip Position: MIDDLE
    Fuel Screw Type: STOCK
    Fuel Screw Setting: 2
    AP Modified: NO
    Leak Jet: STOCK
    AP Cover: QS2
    Exhaust Type: LEXX SLIP ON
    Exhaust Modified: NO
    Pink Wire Modified: NO_________________
  • Heavysledz
    Posts: 10
    Joined: Tue Apr 27, 2010 8:48 pm

    Re: HOW TO: CARB JETTING DATABASE

    by Heavysledz » Wed Jun 02, 2010 2:55 pm

    Year:2005
    Elevation:2500-7000
    Temperature Range:50'F to 110'F
    Smog (AIS):Removed
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: removed
    Air Filter: Twin-Air Powerflow kit
    Pilot Jet: 48
    Main Jet: 170
    Needle: JD-Jetting Red needle
    Needle Clip Position: #4
    Fuel Screw Type: Applied
    Fuel Screw Setting: 1.75 turns out
    AP Modified: no
    Leak Jet: Stock
    AP Cover: Boyesen Powershot cover
    Exhaust Type: Big Gun Evo-X slip-on
    Exhaust Modified: No
    Pink Wire Modified: No
  • User avatar
    mxracer41
    Posts: 212
    Joined: Sat Mar 27, 2010 5:04 pm

    by mxracer41 » Sun Jul 04, 2010 2:57 pm

    Year: 2006 CRF 250R
    Elevation: 400-1500 ft.
    Temperature Range: 70-100 (usually)
    Smog (AIS): N/A
    Airbox Modified Top: No
    Airbox Modified Sides: No
    Backfire Screen: None (powerflow kit)
    Air Filter: Twin air power flow
    Pilot Jet: 48
    Main Jet: 175
    Needle: NCYR
    Needle Clip Position: 3rd from top
    Fuel Screw Type: Turner
    Fuel Screw Setting: 2 3/8 turns out
    AP Modified: No
    Leak Jet: 50
    AP Cover: Stock (possibly quickshot soon)
    Exhaust Type: FMF Factory 4.1 single w/ megabomb header
    Exhaust Modified: Race
    Pink Wire Modified: N/A

    Jetting is pretty much flawless besides a very slight low end (1/8-1/4 throttle) bog, which I am hoping the quickshot will help fix.
  • jsnotech
    Posts: 90
    Joined: Mon Mar 16, 2009 12:45 pm

    by jsnotech » Sat Apr 16, 2011 12:48 pm

    Year: 2008
    Elevation: 4300'asl-8500'asl
    Temperature Range: 46dF-90dF
    Smog (AIS): applied racing block off
    Airbox Modified Top: yes
    Airbox Modified Sides: yes
    Backfire Screen: removed
    Air Filter: twin air backfire w/ stock cage
    Pilot Jet: stock
    Main Jet: 170
    Needle: JD red
    Needle Clip Position: 4th
    Fuel Screw Type: R&D flex
    Fuel Screw Setting: 1 1/4
    AP Modified: no, it is an 08
    Leak Jet: stock
    AP Cover: stock
    Exhaust Type: FMF
    Exhaust Modified: mega bomb & Q4
    Pink Wire Modified: no
  • staffy24
    Posts: 742
    Joined: Wed Dec 29, 2010 3:29 am

    by staffy24 » Fri Jul 29, 2011 4:42 am

    Year: 09
    Elevation: sea level
    Temperature Range: 30-120
    Smog (AIS): n/a
    Airbox Modified Top: no
    Airbox Modified Sides: yes
    Backfire Screen: removed
    Air Filter: hi flo
    Pilot Jet: stock
    Main Jet: 170
    Needle: standard
    Needle Clip Position:4th
    Fuel Screw Type: jd
    Fuel Screw Setting:1/12 -2
    AP Modified:n/a
    Leak Jet: standard
    AP Cover: n/a
    Exhaust Type: fmf power bomb
    Exhaust Modified:lexx
    Pink Wire Modified:no
    over 40 still ridin hard
    still learning

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