[Lars450X]

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

[dirt clod]

Lars, your opinion please on the R&D stuff. Thanks.
Chris

[Lars450X]

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

[loff]

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

[belltownjefe]

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

[stsmith5150]

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

[honda_rules_2005]

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

[450X4LIFE]

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
_________________

[esaresky75]

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

[Four-Fifty-X]

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]

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]

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

[mxracer41]

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]

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]

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