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JETTING HELP 04 wr450

6 posts in this topic

My alt is 60 ft above sea level and the temp is between 80 - 100. Humidity today is 45%.

I currently have a 170 mj, JD red needle #5, #45 pilot and 1 1/4 tunrs out on the fuel screw.

Its running pretty good but i think it could be better any suggestion

would be appreciated.

PS I've done all the free mods and it has a yz pipe

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Cut back to a 160 main and JD red in clip #4 and it will rip even better. That is what I use in the hottest of summers! JD instructions are on the safe (rich) side. :cry: The 45 pilot is perfect for the high temps. :cry:

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Before i changed anything i checked the plug color and its a little on the white

side should i still lower the mj :cry:

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Did you do your plug chop at full wide open throttle for 10 seconds and then kill the engine? Otherwise the plug may be telling you you're lean on your pilot/idle circuit. :cry: If it is running good leave it. :cry: You can try the 165 first and see if it performs better. I use the 170 main as my "winter" main jet. :cry:

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Did you do your plug chop at full wide open throttle for 10 seconds and then kill the engine? :cry:

No i didn't oop's. I did a search on it and decided to put in the 165 mj and red needle #4 i will take it for a test run tomorrow.

Thanks for the help :cry:

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