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03-14-2006, 08:24 AM
I have two questions:

Is the stock 400ex needle adjustable?

Does the little washer go on top or underneath the clip on the needle?

Thanks for any help.
docj400
03-14-2006, 09:34 AM
My 2002 400ex is adjustable. I put the dynojet washer on top of the e-clip
underpowered
03-14-2006, 09:40 AM
they are adjustable, 5 positions
the washer goes on top to hold the need in place.
mrthomas396
03-14-2006, 10:50 AM
Dynojet sends you a needle that is adjustable. The stock one is not. The washer goes on top of the E-ring.
underpowered
03-14-2006, 10:54 AM
Originally posted by mrthomas396
Dynojet sends you a needle that is adjustable. The stock one is not. The washer goes on top of the E-ring.

The stock needle is adjustable, comes from the factory in the 3rd position with 2 above and below.
JOEX
03-14-2006, 10:55 AM
Originally posted by mrthomas396
Dynojet sends you a needle that is adjustable. The stock one is not. The washer goes on top of the E-ring.
The stock needle is adjustable. There are five postions and i've heard there is a shim available to make '1/2' adjustments.

If the Dyno jet kit is used the needle that comes with it must be used.
03-14-2006, 12:05 PM
The needle we have has 6 grooves in it and not 5...WTF kind would that be...hmmmmm
mrthomas396
03-14-2006, 01:08 PM
I just put a jet kit in. The stock needle in an 05 is not adjustable.
GPracer2500
03-14-2006, 01:23 PM
Originally posted by mrthomas396
I just put a jet kit in. The stock needle in an 05 is not adjustable.

That's interesting.

99-04 needle part number is 16012-HN1-003.
05-06 needle part number is 16012-HN1-A41.
mrthomas396
03-14-2006, 01:27 PM
the needle had only one groove
NCexRider
03-14-2006, 01:47 PM
Originally posted by mrthomas396
The stock needle in an 05 is not adjustable.

Correct, and the air/fuel mixture screw takes a special tool.
NCexRider
03-14-2006, 01:48 PM
Originally posted by mrthomas396
the needle had only one groove

That's the way the 05/06 stock needles are. You must also keep in mind that the new models also have a larger stock carb than the 99-04's.;)
underpowered
03-14-2006, 02:45 PM
Originally posted by NCexRider
Correct, and the air/fuel mixture screw takes a special tool.

the air fuel screw was never an issue:confused:
JOEX
03-14-2006, 03:52 PM
Originally posted by mrthomas396
I just put a jet kit in. The stock needle in an 05 is not adjustable.
Thanks for clearing that up;) :)

As for the carb being bigger, has anyone confirmed this? Last I heard the stock carb has an oval bore and the original size was an average of the two demensions. The current size is the larger of the two demensions :confused:
94F450SD
03-14-2006, 04:49 PM
Originally posted by NCexRider
Correct, and the air/fuel mixture screw takes a special tool.

untill you take it out and cut a slot for a screwdriver in it.





the air fuel screw was never an issue

it was on mine
NCexRider
03-14-2006, 05:33 PM
Originally posted by underpowered
the air fuel screw was never an issue:confused:

I was simply citing the differences in carbs between year models, sorry for getting off track Master.;)