UK guys - yz cam timing

I have a 01 wr 426 and am thinking about changing the cam timing, I know this subject has been pretty much done to death but I need to know if I do the mod do I need to change the jetting to take advantage. If anyone has done this mod to their 426, is it worth doing?

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No, I think oil topics have been beat to death! My 01WR is YZtimed & done w/o jetting & that part works great!

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