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I have a new 06 crf 450x total stock condition.
I ride desert and MT.fire roads. I also have to ride slow to stay with some of the quads in our group.
I am happy with the power.
I want to modify the bike for engine and trans longevity.
The bike must stay Cal. green sticker legal.
What mods would you rercomend??

Welcome to the site!!!

Jetting kit and 1 quart of fluid in the transmission.

I took your advice and put the qt. of trany fluid in.
What jetting kit would you recomend for this job??
Would I need to do anything to the pipe because of the new jetting I will install??