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Stock Needle
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Posted by:

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.

Posted by: docj400

My 2002 400ex is adjustable. I put the dynojet washer on top of the e-clip

Posted by: underpowered

they are adjustable, 5 positions
the washer goes on top to hold the need in place.

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.

Posted by: underpowered

quote:
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.

Posted by: JOEX

quote:
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.

Posted by:

The needle we have has 6 grooves in it and not 5...WTF kind would that be...hmmmmm

Posted by: mrthomas396

I just put a jet kit in. The stock needle in an 05 is not adjustable.

Posted by: GPracer2500

quote:
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.

Posted by: mrthomas396

the needle had only one groove

Posted by: NCexRider

quote:
Originally posted by mrthomas396
The stock needle in an 05 is not adjustable.

Correct, and the air/fuel mixture screw takes a special tool.

Posted by: NCexRider

quote:
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.

Posted by: underpowered

quote:
Originally posted by NCexRider
Correct, and the air/fuel mixture screw takes a special tool.

the air fuel screw was never an issue

Posted by: JOEX

quote:
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

Posted by: 94F450SD

quote:
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.

quote:
the air fuel screw was never an issue

it was on mine

Posted by: NCexRider

quote:
Originally posted by underpowered
the air fuel screw was never an issue

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