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Discussion Starter #1
THE RULES

1.Only post information that is listed below. If you start babbling in this thread, your post will get deleted. Short comments like "Thanks" or "Good Thread" will be tolerated as long as they are in conjuction with your jetting specs post.
2.If you feel I left something out or something needs to be changed, simply PM me, do not post it in here.

This thread is a trial run only. If it gets enough positive responses, it will end up in the FAQ and will be a very helpful tool for people to get a baseline for jetting. If it does not, it will end up in the trash. I've been thinking of doing this for quite some time, and finally decided to do so.

Each post should contain ONLY the following information:

Carb Type: Mikuni, FCR, Edelbrock (what bore is the carb?)

Main Jet: Please state what type of jets (Mikuni/Dynojet, etc.)

Pilot Jet:

Fuel Screw:

Needle:

*NOTE*Edelbrock guys, modify the above listings accordingly...the first person to post with an Edelbrock gets to set the template for others to follow.

Airbox: List any mods to include filter

Pipe: What brand-Full or slip-on

Engine Displacement: What size is it (434-455) and who's kit (Yosh/Max Power/Athena). Also list compression ratio.

Cams: Intake/Exhaust/None? What kind?

CDI: What brand, what setting if it's adjustable

Altitude: where you normally ride

Are you happy with the setup: Yes or No followed by breif description (this is the only babbling area...and it's only for comments on your setup).
 

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Carb Type: ---> Mikuni (stock)
Main Jet: ---> 155 Mikuni
Pilot Jet: ---> 25
Fuel Screw: ---> 2.5 turns out
Needle: ---> Dynojet 3rd clip
Airbox: ---> EHS Racing lid, NOSS adapter, K&N filter w/outerwears
Pipe: ---> CT Racing full system
Engine Displacement: ---> Stock (DRZe base gasket and springs)
Cams: ---> Hotcams - Stage 1 (intake and exhaust)
CDI: ---> Dyna Non-programmable
Altitude: ---> 250'

Runs strong. Plug color is perfect, looks like toast.
 

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Carb Type: ---> Edelbrock 34mm x 38mm Oval
Needle Size: ---> 17E
Needle clicks: ---> 13
Accel Pump Screw: ---> 3 turns out
Airbox: ---> Bare Performance aluminum, 250R K&N filter
Pipe: ---> Yoshi RS-3 full, stainless
Engine Displacement: ---> 434cc's
Cams: ---> Hotcams Stage 2
CDI: ---> Yoshimura 11k CDI
Altitude: ---> 4600ft MSL

Cylinder head has mild intake porting and port and polish exhaust.

Non-Edelbrock'ers: 'Brock carb numbers (jetting) are always given from full rich positions, i.e., Needle clicks stated as "13 clicks" would be 13 clicks from full rich (full rich would be stated as "0 clicks"). 'Brock carbs = turn right for richer, left for leaner.
 

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Whoa great post!

Carb type- stock mikuni
Main jet-150 mikuni
Needle-stock
Pilot-25
Air screw-3 turns out
Exaust-Hmf slip
Air filter-Twinair/no lid
everything else stock!
Elevation-close to 0
 

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74 Posts
04- Z
Carb- stock mikuni
Main Jet- 170 mikuni
Pilot- stock
Needle postion- Stock
Air screw- 2 1/2 out
Exhaust- HMF Full
Air Filter- K&N Pro flo W/Ehs Lid
Srp Rev box
Elev. 250ft Ar.
cams-stock
bore/stroke-stock

seems to work well.
 

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Carb Type: Stock 2003 LTZ400 Mikuni BSR36 SS
Main Jet: Mikuni 155 cc/min
Pilot Jet: 25 cc/min
Fuel Screw: 2.5 turns (depending on conditions)
Needle: Dynojet 0712 needle on 4th clip
Airbox: Modded airbox with Spectre gause import car air filter; 400EX airboot; Vented lid (4" X 5" hole) with nylon weave "home made outerwears"
Pipe: Full Yoshi RS-3
Engine Displacement: 398cc Compression ratio: 12.2:1
Cams: Both HotCams
CDI: Cheap Magic Racing (Procom)
Altitude: 300 to 800 feet

Mild head porting (clean - up)


Very Happy!
 

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Carb Type: Stock 2004 LTZ400 Mikuni BSR36 SS
Main Jet: Mikuni 165 cc/min
Pilot Jet: 25 cc/min
Fuel Screw: 2.5 turns (depending on conditions)
Needle: Dynojet 0712 needle on 3th clip
Airbox: no lid
Pipe: Full Yoshi team suzuki system
Engine Displacement: stock
Cams: stock
CDI: stock
Altitude: ohio
 

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Carb Type: Keihin, FCR40
Main Jet: 198
Pilot Jet: 45
Fuel Screw: 3 1/4 turns out
Needle: Keihin, 4th clip
Airbox: ESR intake with K&N filter
Pipe: Full Yoshi Pro Comp Stainless
Engine Displacement: 450cc Lukes Racing with JE 13.1:1 high compression piston
Cams: Intake/Exhaust (Hotcams)
CDI: Dyna FS
Altitude: 150'

Are you happy with the setup: YES!
 

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Carb type: Keihin FCR 39, Flat slide, set up by Sparks Racing
Main Jet: 170 main
Pilot Jet: 50
Fuel Screw: 2 1/2 turns out
Needle: Keihin, on 3rd clip from the top
Bare Perfomance (aluminum) open airbox w/ K&N and Filtercharger
Exhaust: LRD full ceramic
Engine Displacement: 440 Wiseco w/ 13.5:1 piston, kit w/ new cylinder, Nikasil plating
Cams: Hotcams (both)
CDI: Dyna FS (programable)
Altitude: between 900 and 1000 ft.
Port and Polish as well

Am I happy?? You betcha!


EDIT (5/08)

Carb type: Keihin FCR 41, Flat slide, set up by Sparks Racing
Main Jet: 180 main
Pilot Jet: 50
Fuel Screw: 2 turns out
Needle: Keihin, on 3rd clip from the top
Air intake: Custom air box eliminator setup: velocity type intake tube, large K&N w/ Precharger
Exhaust: LRD full ceramic
Engine Displacement: 440 Wiseco w/ 12.5:1 piston, kit w/ new cylinder, Nikasil plating
Cams: Web cams, 288/540 grind, .368/.384
CDI: Dyna FS (programable)
Altitude: between 900 and 1000 ft.
Port and Polish as well
 

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Carb Type: ---> Edelbrock 38mm round
Needle Size: ---> 23E
Needle clicks: ---> 12
Accel Pump Screw: ---> 2 turns out
Airbox: ---> custom air box, 250R K&N filter
Pipe: ---> Yoshi TRS
Engine Displacement: ---> 434cc's
Cams: --->Duncan mid-high
CDI: ---> vortex
Altitude: ---> ~ 900 ft



Lookin for somebody to beat me :re So yes, i'm happy. :evilgrin
 

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yellow 03Z ( I hear yellow is faster )

old intake set-up -
carb - Mikuni BSR36 stk
main - Mikuni 165
pilot - Mikuni 25
needle - Alba 4th clip
fuel screw - Keintech - 2 1/2 turns
air box - stk w/Noss adapter, K&N filter, EHS Racing lid, snorkle removed
a bit rich, but runs strong w/no stumble

new intake set-up-
carb - Sparks FCR39
main - 160
pilot - 50
needle - 3 down
fuel screw - 1 turn out
air box - custom stocker/EHS Racing lid, 400ex air tube/K&N filter
This set-up RIPS!!!

displacement - stk 398 cc
compression - 12.5:1 (Wiseco 13.5:1 w/stk base gasket )
cams - Hotcams stage 1 I/E
valve springs - DRZe
ignition - Dyna fs # 2 curve
exhaust - Pro Circuit T-4 full
plug - NGK CR8EIX
altitude - around 1300' in sw Pa.
 

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Carb Type: Stock

Main Jet: Mikuni 160
Pilot Jet: 2 turns

Fuel Screw: Stock

Needle: 2 clips richer

Airbox:Bare Airbox, 250r K&N w/outerwares

Pipe: Curtis Sparks Full system

Engine Displacement: Stock

Cams: Stock

CDI: Stock

Altitude: 800' above sea level

Happy: was until the airbox, now things seem a little leaner, not a whole lot though. I plan on getting an FCR 40 soon so no need to rejet right now. Awesome Idea CRAZIE!
 

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2003 Z400:
Carb Type: ---> Mikuni (stock)
Main Jet: ---> 155 Mikuni
Pilot Jet: ---> 25
Fuel Screw: ---> 2.5 turns out
Needle: ---> Dynojet 3rd clip
Airbox: ---> K&N w/Outerwears, EHS Racing lid
Pipe: ---> Yosh Comp full system
Engine Displacement: ---> Stock
Cams: ---> Stock
CDI: ---> Stock
Altitude: ---> Sea level

Comments: Seems to be rich still, haven't had time to fine-tune the jetting. Last trip was Glamis, ran great at midrange, had trouble pulling 5th gear in sand. Just got new EHS Racing lid w/Outerwears prefilter, will report back after next trip (also to Glamis, 3/18-20)

OK, after Glamis last month and Cal City last weekend, it's a still bit rich but runs like a scalded ape. I ain't messin' wit it no mo'.

Great idea Crazie, this oughta become permanent!!!


Update, 1/2009: Still running this setup, anywhere from sea level to 3000', about eight to ten times a year. Ain't messed wit it yet, still runs good almost four years later...
 

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'05 400

Carb Type: ---> stock
Main Jet: ---> 165 Mikuni
Pilot Jet: ---> stock
Fuel Screw: --->2 turns out
Needle: ---> stock
Airbox: --->TwinAir filter - custom lid - snorkel on
Pipe: ---> White Bros (shorty) slip-on (no discs or endcap)
Engine Displacement: ---> Stock
Cams: ---> Stock
CDI: ---> Procom
Altitude: ---> Sea level - 500m

Runs great !
 

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Carb Type: ---> Mikuni (stock)
Main Jet: ---> 144 Dynojet (winter), 140 Dynojet (summer)
Pilot Jet: ---> 22.5
Fuel Screw: ---> 3.5 turns out
Needle: ---> Dynojet 3rd clip
Airbox: ---> Stock airbox with stock lid, removed snorkle baffle
Pipe: ---> Stock with modded endcap
Engine Displacement: ---> Stock
Cams: ---> Stock
CDI: ---> Stock
Altitude: ---> Sea level
 

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Carb Type: Mikuni - stock carb
Main Jet: Mikuni 155
Pilot Jet: 25
Fuel Screw: 2.25 turns out
Needle: alba middle notch
Airbox: Stock box, no lid w/k&n pro flow
Pipe: stock
Engine Displacement: 400cc 12.2:1
Cams: stock
CDI: stock
Altitude: 1000'
Are you happy with the setup: Yep, with a 13 tooth sprocket it is loads of fun on the trails :)
 

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Carb Type: ---> Mikuni BSR (stock)
Main Jet: ---> 155 Mikuni
Pilot Jet: ---> 22.5
Fuel Screw: ---> 2.5 turns out
Needle: ---> Stock needle shimmed w/ two 3mm washers
Airbox: ---> No lid, no snorkle, K&N w/ outerwear.
Pipe: ---> Yoshimura RS-3 Stainless
Engine Displacement: ---> Stock
Cams: ---> Stock
CDI: ---> Procom (sucks)
Altitude: ---> 1090'
 

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'04 KFX 400

Carb Type: Stock Mikuni BSR36

Main Jet: 150 Alba

Pilot Jet: 25 Alba

Fuel Screw: 2.75, but adjusted based on altitude (see below)

Needle: 4th Clip Alba

Airbox: Billet Adapter, K&N+Outerwear, No Lid, Sometimes Snorkel

Pipe: FMF Power Core 4 + Power Bomb Header

Engine Displacement: Stock 398cc

Cams: Stock

CDI: Stock

Altitude: Trails=1,500' Dunes=4,300'

Happy. Some recent mods so somewhat still tbd. Sounds great and pulls through the low end very quickly. Want to get a 13T front sprocket. Will have final results 3/4-3/6 at Sand Mountain, Fallon, NV....woohoo
 

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Carb Type: ---> Edelbrock 38mmx34mm
Needle Size: ---> 17E
Needle clicks: ---> 27
Accel Pump Screw: ---> 2.25 turns out
Airbox: ---> Stock air box, lid removed, alba adapter with KN
Pipe: ---> HMF full system
Engine Displacement: ---> 400cc's
Cams: --->Hot Cams stage 2
CDI: ---> not yet but soon
Compression ratio:--->12.5
Altitude: ---> ~ 1900 ft


Very happy with the current mods. Love the way the quad pulls through out the power band. Bad thing, I have to shift a lot cause of the stock rev limiter, but thats what the yosh cdi wil take care of.
 

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Carb Type: ---> Keihin CVK40mm
Needle Size: ---> Std Fixed Height Needle
Needle clicks: ---> 5 washers spacing it
Main Jet----> 175
Pilot Jet-----> 40
Accel Pump Screw: ---> 2.25 turns out
Airbox: ---> Stock air box, lid removed, snorkel removed, K & N Filetr with adapter
Pipe: ---> Full Duncan Racing Fat Boy 4
Engine Displacement: ---> 400cc's
Cams: --->Hot Cams stage 2
CDI: ---> Procom
Compression ratio:--->DRZ base gasket fitted
Altitude: ---> ~ 300 ft

Carb taken from a Kawasaki KLX650 (been a nightmare to get working right!!!) but hay, it was cheap!!!
 
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