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07 WR450F Gurgle Throttle Wide Open

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07 WR450F gurgles in all gears with throttle wide open (95-100%)

Mods-

Grey wire

Air Box

Exhaust pea shooter removed

(Street Legal- Hi/lo beams, brake light, horn and DOT tires)

Throttle Stop replaced

JD kit per email from JD:

168 Main

Red needle -clip in 5th position

Adjustable Fuel Screw (2 turns)

Accerator pump- thick rubber washer

AIS has not been removed

ACV has not been disabled

TPS has not been disabled

Live in Michigan - 800' MSL and 78 degrees F.

Could it be the TPS?

Other than the gurgle, seems to run smooth.

Thanks in advance for your help.

Doug

One other thing......the seat hurts my ass. Got anything for that?

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No......It very well could be that. I will ride it and keep that in mind. I had read about the rev limiter but that was 200 posts ago and I had totally forgotten about it. I think the only solution for that is a new box (that isn't on the market yet) isn't it?

Eddie, thanks again for your help.

Doug

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QUICKEST WAY TO PICK UP A VALVE PROBLEM. hENCE THE REV LIMITER

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Doug,

Did you try the blue in the fourth and 170 main as in the instructions?

Just curious as I am going to to be installing the kit soon and only want to R&R

the carb once. The 170 does seem rich.

Jeff

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Jeff,

Below is an email correspondense with James Dean. He recommended the setup below. Later email suggested a 170 main with the FMF pipe.

Hope this helps.

Doug

Originally Posted by Michigan DS

JD,

I just received a jet kit from you (with the adj fuel screw) for my 2007 WR450. I have 3 questions.

Living in Michigan, <1000' MSL, 60-90F -

1) Red Needle or Blue and which clip position? According to the chart I should use a blue for my altitude, but a red for my temperature.

2) Which main - I believe the directions call for the 168.

3) With your kit, is it beneficial to disable ACV (open or closed) and/or the TPS?

Bike info-

2007 WR450F

AIS removal

Air Box binocular removal

grey wire disconnect

Stock pipe (for now) with insert removed

Thanks in advance for your help,

Doug

Doug,

Use the Red needle in clip position #5 from top for the warm conditions and low elevations. I would also use the stock pilot jet and #168 main jet with your other changes.

The ACV can remain enabled and will not make much difference, as it only richens the jetting on deceleration.

Thanks,

James

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Doug,

Thanks for the info. Found on the jetting database at least 2 other guys

running this setup with good results. Going to give it a try.

Jeff

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