jetting survey

[Leo]

A DIY jetting article was sent to me.. What I want to do is compile a list of common mods + what you are running for jetting... I'm going to make a list of as many setups as I can, so people can use them as a baseline when jetting...
So, what I need is for you to list;

if your quad is a 300/400...
engine mods...
airbox mods...
exhaust mods...
what air filter you run...
rough altitude you ride at...
main jet (specify OEM or dynojet)...
needle position (specifiy OEM or dynojet)...
pilot jet size...
pilot screw position...

Please include as many details as you can.. I think if we can come up with a decent list of mod/jetting combos it will give everyone a rough idea of where to start when jetting there quads!

Thanks to everyone who helps!

Leo

[400exRacerX]

400ex
stock engine, except for clutch mods, wich are listed in my signature
outerwear airbox lid
white brothers silencer with open end cap
powerbomb head pipe
K&N filter
roughly 700ft above sea level
158 main jet, OEM style jet
needle is at stock position
42 pilot screw, OEM style
pilot screw is at stock position

[MOFO]

Ok, here it goes...


400EX
-FMF Powercore IV SA
-Stock head pipe (for now)

Airbox Mods
-(6) 1" Uni filter vents
-Uni Filter airfilter

1246 ft above sea-level (airport 3 min away)

MAIN JET: 155 Summer - 160 Fall, Winter and Spring
I run this combo because my quad runs rich during the
hot summer days (air less dense). Yes I am very picky Anyone else notice their quad gets more air when its cooler out?

PILOT JET: 40 (going to change to a 42)

NEEDLE JET: STOCK (for now...going to move clip one position)

AIR/MIX SCREW: Went to dealer to use their special screw driver to adjust it. Have it adjusted for the highest idle, then back the idle down to stock RPM's via idle adjustment screw. (recommended by head mechanic/engine builder)

The reason I wanted to use their screwdriver is that when I had my quad warmed up, I could not get a regular screwdriver in there to adjust it without burning my arm on my exhaust. And I'm too cheap to buy that extended/flexible screwdriver



As you can see I am still tweaking my quad, but it runs GREAT as is. Just a tad rich, exactly how I want it.

Eric

[Leo]

Thanks guys...

Let's have some more!

Leo

400EX
no engine mods
4"x8" hole in airbox lid with foam filter attached
Pro-Circuit T-4 exhaust with stock headers
stock air filter
550' altitude
165 keihin main jet
stock needle position
stock pilot with stock setting plus 1/2 turn out

soon to increase pilot to 40 or 42
this bike runs strong
Thanks to all who have helped !
John

[Winged Warrior]

400EX uni filter/148 main oem/40 pilot oem/WB slipon/oem everything else/altitude ,who the heck knows-somewhere in the hills of
ky.

[4punksdad]

>2000 400EX
>no engine mods
>2 different airbox lids, both modified & pre-filtered
>Modified stock exhaust silencer (removed s/a & rear baffle plate)
>stock foam air filter
>elevation= 500 feet
>165 main jet
>stock needle position
>stock pilot jet
>stock screw setting

95 honda 300ex
stock engine
cobra silencer and headpipe
k&n filter w/ outerwear
stock airbox
130 oem style main
air/fuel screw turned once more in than stock
stock pilot and clip position
800 ft elevation

[Leo]

keep the setups coming

Leo

[400exBro]

2001 400ex
White Brothers e-seris s-bend pipe
K&N filter with pre charger
4 7/8inchs air box holes
160 main dyno jet
3rd notch
no engine mods
around 1000 feet