Rejet after going to YZ timing?

What do I need to do with the carb after going to the YZ timing, bigger main? I have stock exhaust w/ baffle removed. Also, stock gearing for the WR400 is 15/50 correct? After the YZ timed, should I go with something steeper like, 14/52?

I have a 2000 WR and I am running 180 main 48 pilot 5th clip position on a dvr needle and stock gearing which works fine.

Stock gearing is 14/50. I went to 13/50, others are going 14/52.


99 WR, all YZ mods, de-octopused, OEM YZ tank and seat, jetting by Clark.

for all yours,

is very interesting about jetting 00 wr4oo with timing wr, the big question? I live at level sea, warm place, and all my rides in weekend are beetwn o and 4500 feets, but 3 times for year make a trip though the montains from o´ 9000 Feets, with the mod´s (exauths, air box, totle stop) what kind of jetting do you recomend me. 14 days more I´ll get my new one, Before I had a big 600 stock now I see a ligth bike is more fun but I litle worry about the power and run lean.

thanks to every body.

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