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wilb67

Need a copy for JD jetting instructions

4 posts in this topic

Anyone have a copy of the jetting instructions for the JD jetting kit for a 07 WR 450. I have the kit but no instructions for elevation and which needle and jets to use.

Or let me know what jets and needle (red or blue plus clip position) to use for 700' elevation,75 deg. air temp.,ais removed,gray wire cut,air box snorkel removed,complete baffel removed from stock exhaust ,O ring mod., ZT fuel screw.

Thanks,Will.

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Anyone have a copy of the jetting instructions for the JD jetting kit for a 07 WR 450. I have the kit but no instructions for elevation and which needle and jets to use.

Or let me know what jets and needle (red or blue plus clip position) to use for 700' elevation,75 deg. air temp.,ais removed,gray wire cut,air box snorkel removed,complete baffel removed from stock exhaust ,O ring mod., ZT fuel screw.

Thanks,Will.

Hey Man,

i believe if go to JD jetting web site you can download them.

or just e-mail him, i sure they will send you the pdf

cheers

Warts

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From the Sticky. IMO, one of the best pieces of info on this forum....

Here is what works for me and you guys can use it as a starting point to jet your WR450 bikes only! :bonk:

(Note: do not use these for WR426 or WR400 due to carb differences!) :bonk:

This recommendation requires air box flow mods and an open stock or aftermarket pipe and ACV circuit intact. :bonk:

Elevation 0 to 4,000. feet

30 to 45 degrees: 172 main, JD Blue #5, 48 Pilot, 2.0 turns, 75 starter jet, #0 leak jet

45 to 60 degrees: 170 main, JD Blue #4, 48 Pilot, 1.75 turns, 72 starter jet, #0 leak jet

60 to 75 degrees: 168 main, JD Blue #3 or JD Red #5, 48 Pilot, 1.5 turns, 70 starter jet, #40 leak jet

75 to 90 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 68 starter jet, #50 leak jet

90 degrees plus: 160 main, JD Red #4, 45 Pilot, 2.0 turns, 65 starter jet, #60 leak jet

Elevation 4,000 to 8,000 feet:

30 to 45 degrees: 170 main, JD Blue #4, 48 Pilot, 1.75 turns, 72 starter jet, #0 leak jet

45 to 60 degrees: 168 main, JD Blue #3, 48 Pilot, 1.5 turns, 70 starter jet, #40 leak jet

60 to 75 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 68 starter jet, #40 leak jet

75 to 90 degrees: 165 main, JD Red #5, 45 Pilot, 2.0 turns, 65 starter jet, #50 leak jet

90 degrees plus: 160 main, JD Red #4, 45 Pilot, 1.75 turns, 65 starter jet, #60 leak jet

Elevation 8,000 to 11,000 feet: ( Note you will loose a lot of power due to altitude but your bike will idle and not foul plugs!)

45 to 60 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 70 starter jet, #40 leak jet

60 to 75 degrees: 160 main, JD Red #4 , 45 Pilot, 1.75 turns, 68 starter jet, #50 leak jet

75 to 90 degrees: 158 main, JD Red #3, 45 Pilot, 1.5 turns, 65 starter jet, #60 leak jet

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